Atlas of the Flora of New England

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Genera - D

Dactylis
Dactyloctenium
Dactylorhiza
Dalea
Dalibarda (See Rubus)
Danthonia
Daphne
Dasiphora
Datura
Daucus
Decodon
Deinandra
Delphinium (see also Consolida)
Dennstaedtia
Dentaria (See Cardamine)
Deparia
Deschampsia (see also Avenella and Vahlodea)
Descurainia
Desmazeria (See Catapodium)
Desmodium (see alao Hylodesmum)
Deutzia
Dianthus
Diapensia
Dicentra (see also Lamprocapnos)
Dichanthelium
Dictamnus
Diervilla
Digitalis
Digitaria
Dinebra
Diodia
Dioscorea
Diospyros
Diphasiastrum
Diplachne
Diplacus
Diplazium (see Deparia & Homalosorus)
Diplotaxis
Dipsacus
Dirca
Distichlis
Dittrichia
Doellingeria
Doronicum
Draba
Dracocephalum
Drosera
Drymocallis
Dryopteris (see also Gymnocarpium, Phegopteris and Thelypteris)
Duchesnea
Dulichium
Dysphania
Dyssodia (see also Thymophylla)


DACTYLIS (Family: Poaceae)


DACTYLIS GLOMERATA Linnaeus subsp. GLOMERATA - Orchard-grass. 2n = 14, 28, (35).


Roadsides, fields, orchards, waste places. From Europe. [D. GLOMERATA var. CILIATA Petermann; D. GLOMERATA var. DETONSA Fries]



DACTYLOCTENIUM (Family: Poaceae)


DACTYLOCTENIUM AEGYPTIUM (Linnaeus) Willdenow - Crowfoot-grass. 2n = (18), (20), (22), (24), (34), (36), (38), 40, (42), (44), 46, 48, (52).


Waste land. From the Old World tropics.



DACTYLORHIZA (Family: Orchidaceae)


Dactylorhiza viridis (Linnaeus) R.M. Bateman, Pridgeon & M.W. Chase - Bracted Orchis. 2n = 40, (41), (42), (80).


Rich, moist woods, thickets, meadows. [Coeloglossum viride (Linnaeus) Hartman var. virescens (Muhlenberg ex Willdenow) Luer; Habenaria viridis (Linnaeus) R. Brown var. bracteata (Muhlenberg ex Willdenow) A. Gray]



DALEA (Family: Fabaceae)


DALEA CANDIDA Willdenow var. CANDIDA - White Prairie-clover. 2n = 14.


Railroads. From farther west.


DALEA LEPORINA (Aiton) Bullock - Foxtail Prairie-clover. 2n = 14.


Rich, open soil, waste places. From farther west, Mexico, Central and South America.


DALEA PURPUREA Ventenat var. PURPUREA - Purple Prairie-clover. 2n = 14.


Sandy waste areas. From farther west.



DANTHONIA (Family: Poaceae)


Danthonia compressa Austin - . 2n = 36.


Dry, open woodlands, clearings. [D. alleni Austin]


Danthonia spicata (Linnaeus) P. Beauvois ex Roemer & Schultes - Poverty Oat-grass. 2n = 36.


Dry, sterile soil. [D. spicata var. longipila Scribner & Merrill; D. spicata var. pinetorum Piper]



DAPHNE (Family: Thymelaeaceae)


DAPHNE CNEORUM Linnaeus - Rose Daphne. 2n = 18.


Dry, woodland roadside near cellar hole. From Europe.


DAPHNE MEZEREUM Linnaeus - Mezereon. 2n = 18.


Roadsides, thickets, calcareous rocky knolls and hillsides, dry woods, fields. From Eurasia.



DASIPHORA (Family: Rosaceae)


Dasiphora fruticosa (Linnaeus) Rydberg - Shrubby Cinquefoil. 2n = 14, 28, (42).


Meadows, swamps, fields, ledges, usually in calcareous soil. [D. fruticosa subsp. floribunda (Pursh) Kartesz; Pentaphylloides floribunda (Pursh) Á. Löve - illegitimate name; Potentilla fruticosa Linnaeus]



DATURA (Family: Solanaceae)


DATURA INNOXIA Miller - Downy Thorn-apple. 2n = 24, (48).


Waste places, roadsides, railroads. From Texas, Mexico, Central America, Caribbean, South America.


DATURA STRAMONIUM Linnaeus - Jimsonweed. 2n = 24, (36), (48).


Waste places, roadsides, fields. From Mexico and perhaps elsewhere in the Americas. [D. STRAMONIUM var. TATULA (Linnaeus) Torrey]


DATURA WRIGHTII Regel - Sacred Thorn-apple. 2n = 24.


Waste places. From farther west.



DAUCUS (Family: Apiaceae)


DAUCUS CAROTA Linnaeus - Queen Anne’s-lace. 2n = 18, (22), (36), (54).


Dry fields, waste places, roadsides. From Eurasia, northwestern Africa.



DECODON (Family: Lythraceae)


Decodon verticillatus (Linnaeus) Elliott - Swamp Loosestrife. 2n = 32.


Pond and bog margins, shores, swamps, usually in shallow water. [D. verticillatus var. laevigatus Torrey & A. Gray]



DEINANDRA (Family: Asteraceae)


DEINANDRA FASCICULATA (de Candolle) Greene - 2n = 24.


Wool waste. From farther west. [HEMIZONIA FASCICULATA (de Candolle) Torrey & A. Gray; H. FASCICULATA subsp. RAMOSISSIMA (Bentham) D.D. Keck; H. RAMOSISSIMA Bentham]



DELPHINIUM (Family: Ranunculaceae)


DELPHINIUM EXALTATUM Aiton - Tall Larkspur. 2n = ?


Roadsides. From farther south and west.



DENNSTAEDTIA (Family: Dennstaedtiaceae)


Dennstaedtia punctilobula (Michaux) T. Moore - Hay-scented Fern. 2n = 68.


Open woods, roadsides, stream banks, pastures and rocky slopes in sterile soils.



DEPARIA (Family: Dryopteridaceae)


Deparia acrostichoides (Swartz) M. Kato - Silvery Spleenwort. 2n = 80.


Rich moist woods, bottom lands, shaded slopes. [Athyrium thelypterioides (Michaux) Desvaux; Diplazium acrostichoides (Swartz) Butters]



DESCHAMPSIA (Family: Poaceae)


Deschampsia cespitosa (Linnaeus) P. Beauvois subsp. cespitosa - Tufted Hairgrass. 2n = (14), (18), (21), (24), 26, (28), (49), 52, (56).


Meadows, fields, riverbanks, gravelly shores. [D. cespitosa var. glauca (Hartman) Lindman (son) - illegitimate name; D. CESPITOSA var. PARVIFLORA (Thuiller) Cosson & Germain de Saint Pierre (a cultivar of the typical taxon)]


DESCHAMPSIA DANTHONIOIDES (Trinius) Munro - Annual Hairgrass. 2n = 26.


Wool waste. From farther west.



DESCURAINIA (Family: Brassicaceae)


Descurainia incana ((Bernhardi ex Fischer & C.A. Meyer) Dorn - Mountain Tansy-mustard. 2n = 14, (28), (42).


Calcareous gravels, roadsides. [D. richardsonii O.E. Schulz - illegitimate name]


Descurainia pinnata (Walter) Britton subsp. brachycarpa (Richardson) Detling - Green Tansymustard. 2n = 14, 28.


Roadsides, waste places, dry, rocky or sandy soils.


DESCURAINIA SOPHIA (Linnaeus) Webb ex Prantl - Flixweed. 2n = (12), (14), (20), 28, (56).


Roadsides, waste places. From Eurasia.



DESMODIUM (Family: Fabaceae)


Desmodium canadense (Linnaeus) de Candolle - Showy Tick-trefoil. 2n = 22.


Thickets, fields, open woods, meadows, riverbanks, sandy, open soil, roadsides, railroads, waste places.


Desmodium canescens (Linnaeus) Poiret - . 2n = ?


Dry, sandy woods, fields, thickets, roadsides and waste areas.


Desmodium cuspidatum (Muhlenberg ex Willdenow) de Candolle ex G. Don - . 2n = 22.


Rocky, rich, open woods.


Desmodium marilandicum (Linnaeus) de Candolle var. marilandicum - . 2n = ?


Dry, open, rocky or sandy woods, fields, roadsides.


Desmodium marilandicum (Linnaeus) de Candolle var. ciliare (Muhlenberg ex Willdenow) H. Ohashi - . 2n = (20), 22.


Dry, often sandy, woods and clearings. [D. ciliare (Muhlenberg ex Willdenow) de Candolle]


Desmodium marilandicum (Linnaeus) de Candolle var. lancifolium (Fernald & B.G. Schubert) H. Ohashi - . 2n = ?


Dry, sandy or rocky, open woods. [D. obtusum (Muhlenberg ex Willdenow) de Candolle; D. rigidum (Elliott) de Candolle]


Desmodium paniculatum (Linnaeus) de Candolle var. paniculatum - . 2n = 22.


Dry, open, often rocky or sandy woods, dry, woodland borders, thickets, clearings, fields, roadsides. [D. dillenii Darlington; D. glabellum (Michaux) de Candolle; D. perplexum B.G. Schubert]


Desmodium rotundifolium de Candolle - . 2n = 22.


Dry, often rocky, woods, clearings, fields, woodland margins, fields, roadsides.


Desmodium sessilifolium Torrey & A. Gray - . 2n = ?


Dry, sandy soils, roadsides, railroads.


Desmodium hybrid

Desmodium X humifusum (Muhlenberg ex Bigelow) L.C. Beck - .


[D. paniculatum (Linnaeus) de Candolle X D. rotundifolium de Candolle]



DEUTZIA (Family: Hydrangeaceae)


DEUTZIA SCABRA Thunberg - . 2n = 26, 130.


Waste places, roadsides, cemeteries, thickets, woodlands, streambanks. From Japan.



DIANTHUS (Family: Caryophyllaceae)


DIANTHUS ARMERIA Linnaeus subsp. ARMERIA - Deptford Pink. 2n = 30.


Roadsides, dry, grassy fields. From Eurasia.


DIANTHUS BARBATUS Linnaeus subsp. BARBATUS - Sweet William. 2n = 30.


Waste places, roadsides, fields. From Europe.


DIANTHUS CARTHUSIANORUM Linnaeus - Clusterhead Pink. 2n = 30, (60).


Disturbed ground, fields. From Europe.


DIANTHUS CARYOPHYLLUS Linnaeus - Clove Pink. 2n = 30, (60).


From Mediterranean region.


DIANTHUS DELTOIDES Linnaeus subsp. DELTOIDES - Maiden Pink. 2n = 30, (60).


Fields, roadsides, waste places. From Europe.


DIANTHUS PLUMARIUS Linnaeus subsp. PLUMARIUS - Garden Pink. 2n = 30, 60, 90.


Dry, sandy fields, roadsides. From eastern Europe.



DIAPENSIA (Family: Diapensiaceae)


Diapensia lapponica Linnaeus subsp. lapponica - Diapensia. 2n = 12.


Bare, rocky alpine summits or other open, rocky sites at high altitudes.



DICENTRA (Family: Papaveraceae)


Dicentra canadensis (Goldie) Walpers - Squirrel-corn. 2n = 64.


Rich woods.

Dicentra cucullaria (Linnaeus) Bernhardi - Dutchman's-breeches. 2n = 32, ca. 48.


Rich woods, often along rivers, in calcareous soil.


DICENTRA EXIMIA (Ker Gawler) Torrey - Eastern Bleeding Heart. 2n = 16, (18).


Moist soil, brooksides, roadsides. From farther south.


DICENTRA FORMOSA (Andrews) Walters subsp. FORMOSA - Pacific Bleeding Heart. 2n = 16, (24), 32.


From the Pacific coast.



DICHANTHELIUM (Family: Poaceae)


Dichanthelium acuminatum (Swartz) Gould & C.A. Clark var. acuminatum - . 2n = 18.


Dry sand, beaches, open habitats, sandy woods (damp or dry), damp meadows, salt marshes. [Panicum acuminatum Swartz var. acuminatum; P. addisonii Nash; P. albemarlense Ashe; P. auburne Ashe; P. columbianum var. oricola (Hitchcock & Chase) Fernald; P. columbianum var. thinium Hitchcock & Chase; P. commonsianum Ashe var. commonsianum; P. commonsianum var. addisonii (Nash) Fernald; P. implicatum Scribner; P. lanuginosum Elliott; P. lanuginosum var. implicatum (Scribner) Fernald; P. lanuginosum var. septentrionale Fernald; P. lanuginosum var. tennesseense (Ashe) Gleason; P. meridionale Ashe; P. meridionale var. albemarlense (Ashe) Fernald; P. ovale Elliott var. pseudopubescens (Nash) Lelong; P. pseudopubescens Nash; P. subvillosum Ashe; P. tennesseense Ashe; P. villosissimum Nash; P. villosissimum Nash var. pseudopubescens (Nash) Fernald]


Dichanthelium acuminatum (Swartz) Gould & C.A. Clark var. densiflorum (E.L. Rand & Redford) Gould & C.A. Clark - . 2n = 18.


Shores, meadows. [Panicum spretum Schultes]


Dichanthelium acuminatum (Swartz) Gould & C.A. Clark var. fasciculatum (Torrey) Freckmann - . 2n = 18.


Thin, dry woodlands, dry or moist sterile soil in the open. [Panicum acuminatum Swartz var. fasciculatum (Torrey) Beetle; P. huachucae Ashe var. fasciculatum (Torrey) F.T. Hubbard; P. lanuginosum Elliott var. fasciculatum (Torrey) Fernald]


Dichanthelium acuminatum (Swartz) Gould & C.A. Clark var. lindheimeri (Nash) Gould & C.A. Clark - . 2n = 18.


Thin, dry woodlands, dry or moist sterile soil in the open. [Panicum acuminatum Swartz var. lindheimeri (Nash) Beetle; P. lanuginosum Elliott var. lindheimeri (Nash) Fernald; P. lindheimeri Nash]


Dichanthelium acuminatum (Swartz) Gould & C.A. Clark var. longiligulatum (Nash) Gould & C.A. Clark - . 2n = 18.


Pond shores. [Panicum wrightianum Scribner]


Dichanthelium boreale (Nash) Freckmann - . 2n = 18.


Shores, meadows, moist woods, fields. [Panicum boreale Nash; P. bicknellii Nash var. bicknellii; P. bicknellii var. calliphyllum (Ashe) Gleason; P. calliphyllum Ashe]


Dichanthelium boscii (Poiret) Gould & C.A. Clark - . 2n = 18, 36.


Dry woods. [Panicum boscii Poiret; P. boscii var. molle (Vasey) Hitchcock & Chase]


Dichanthelium clandestinum (Linnaeus) Gould - . 2n = 36, (40).


Thickets, shores, alluvial woods borders. [Panicum clandestinum Linnaeus]


Dichanthelium commutatum (Schultes) Gould - . 2n = 18, (36).


Dry, open woods, open sandy or rocky places. [Panicum ashei T.G. Pearson ex Ashe; P. commutatum Schultes var. commutatum; P. commutatum var. ashei (T.G. Pearson ex Ashe) Fernald; P. divergens Kunth]


Dichanthelium depauperatum (Muhlenberg) Gould - . 2n = 18.


Dry or sandy soil, open woods. [Panicum depauperatum Muhlenberg; P. depauperatum var. involutum (Torrey) Alph. Wood; P. depauperatum var. psilophyllum Fernald]


Dichanthelium dichotomum (Linnaeus) Gould var. dichotomum - . 2n = 18.


Dry, open or rocky woods. [Panicum annulum Ashe; P. annulum Ashe var. glabrescens Gleason; P. clutei Nash; P. dichotomum Linnaeus var. dichotomum; P. dichotomum var. barbulatum (Michaux) Alph. Wood; P. barbulatum Michaux; P. dichotomum var. lucidum (Ashe) Lelong; P. lucidum Ashe; P. mattamuskeetense Ashe var. clutei (Nash) Fernald]


Dichanthelium dichotomum (Linnaeus) Gould var. ramulosum (Torrey) Leblond - . 2n = 18.


Woodlands, openings. [Panicum microcarpon Muhlenberg ex Elliott; P. nitidum Lamarck var. ramulosum Torrey]


Dichanthelium dichotomum (Linnaeus) Gould subsp. mattamuskeetense (Ashe) Freckmann & Lelong - . 2n = 18, 32.


[P. dichotomum Linnaeus var. mattamuskeetense (Ashe) Lelong; P. mattamuskeetense Ashe]


Dichanthelium latifolium (Linnaeus) Harvill - . 2n = 18, 36.


Open, usually dry, woods. [Panicum latifolium Linnaeus]


Dichanthelium linearifolium (Scribner) Gould - . 2n = 18.


Dry soil, open woods, slopes. [Panicum linearifolium Scribner; P. linearifolium var. werneri (Scribner) Fernald; P. werneri Scribner]


Dichanthelium oligosanthes (Schultes) Gould var. oligosanthes - . 2n = 18.


Dry, open soil.

[Panicum oligosanthes Schultes var. oligosanthes; P. oligosanthes var. scribnerianum (Nash) Fernald; P. scribnerianum Nash]


Dichanthelium portoricense (Desvaux ex Hamilton) B.F. Hansen & Wunderlin - . 2n = 18.


Sandy open ground, thin woods. [Panicum columbianum Scribner; P. tsugetorum Nash]


Dichanthelium scabriusculum (Elliott) Gould & C.A. Clark - . 2n = 18.


Moist open ground. [Panicum aculeatum Hitchcock & Chase; P. recognitum Fernald; P. scabriusculum Elliott]


Dichanthelium scoparium (Lamarck) Gould - Velvet Panic-grass. 2n = 18.


Damp soil. [Panicum scoparium Lamarck]


Dichanthelium sphaerocarpon (Elliott) Gould - . 2n = 18.


Dry fields and woods, beaches. [Panicum sphaerocarpon Elliott]


Dichanthelium xanthophysum (A. Gray) Freckmann - . 2n = 36.


Sandy, open woods and clearings. [Panicum xanthophysum A. Gray]


Dichanthelium hybrids

Dichanthelium acuminatum (Swartz) Gould & C.A. Clark X D. dichotomum (Linnaeus) Gould - .



Dichanthelium dichotomum (Linnaeus) Gould X D. latifolium (Linnaeus) Harvill - .



Dichanthelium X scoparioides (Ashe) Mohlenbrock (pro species) - .


Open woods. [D. acuminatum (Swartz) Gould & C.A. Clark X D. oligosanthes (Schultes) Gould; Panicum villosissimum Nash var. scoparioides (Ashe) Fernald]



DICTAMNUS (Family: Rutaceae)


DICTAMNUS ALBUS Linnaeus - Gas Plant. 2n = (30), 36, (72).


Ledges, woodlands. From Eurasia.



DIERVILLA (Family: Caprifoliaceae)


Diervilla lonicera Miller - Bush-Honeysuckle. 2n = 18, 36.


Dry woods, clearings, thickets, woodland margins, rocky places.



DIGITALIS (Family: Plantaginaceae)


DIGITALIS GRANDIFLORA Miller - Yellow Foxglove. 2n = 56.


Fields, waste places, roadsides, open woods, thickets, woodland margins. From Eurasia. [D. AMBIGUA Murray]


DIGITALIS LAEVIGATA Waldstein & Kitaibel - . 2n = 56.


Woodland margins. From Balkan Europe.


DIGITALIS LANATA Ehrhart - Grecian Foxglove. 2n = (48), 56.


Fields, roadsides, waste places. From Eurasia.


DIGITALIS LUTEA Linnaeus - Straw Foxglove. 2n = (16), 96, 56, 112.


Roadsides, waste places. From Europe.


DIGITALIS PURPUREA Linnaeus - Common Foxglove. 2n = (48), 56, (112).


Waste places, roadsides, fields, woodland margins. From Europe, northwestern Africa.



DIGITARIA (Family: Poaceae)


Digitaria cognata (Schultes) Pilger - Fall Witchgrass. 2n = 36, (70), 72.


Dry, sandy soil near rivers. [Leptoloma cognatum (Schultes) Chase]


Digitaria filiformis (Linnaeus) Koeler var. filiformis - Slender Crabgrass. 2n = 36, 54.


Dry, gravelly or sandy, open soil.


DIGITARIA ISCHAEMUM (Schreber) Muhlenberg var. ISCHAEMUM - Smooth Crabgrass. 2n = 18, 36, (45).


Rail yards, dry, sandy soil, waste ground. From Eurasia.


DIGITARIA SANGUINALIS (Linnaeus) Scopoli - Common Crabgrass. 2n = (18), (28), 36, (54), (72), (76).


Yards, gardens, waste places, roadsides. From Europe.


DIGITARIA VIOLASCENS Link - . 2n = (18), 36.


Old fields. From farther south.


Digitaria hybrid

DIGITARIA ISCHAEMUM (Schreber) Muhlenberg X D. SANGUINALIS (Linnaeus) Scopoli - .




DINEBRA (Family: Poaceae)


DINEBRA PANICEA (Retzius) P.M. Peterson & N. Snow subsp. BRACHIATA (Steudel) P.M. Peterson & N. Snow - . 2n = 20.


Fields. From farther south. [LEPTOCHLOA PANICEA (Retzius) Ohwi subsp. brachiata (Steudel) N. Snow]


DINEBRA PANICEA (Retzius) P.M. Peterson & N. Snow subsp. MUCRONATA (Michaux) P.M. Peterson & N. Snow - Red Sprangletop. 2n = 20, (40).


Fields. From farther south. [LEPTOCHLOA FILIFORMIS - misapplied; L. MUCRONATA (Michaux) Kunth; L. PANICEA (Retzius) Ohwi subsp. MUCRONATA (Michaux) Nowack]



DIODIA (Family: Rubiaceae)


Diodia teres Walter - Poor-joe. 2n = 28.


Dry, sandy soil, beaches, roadsides, waste places.



DIOSCOREA (Family: Dioscoreaceae)


DIOSCOREA POLYSTACHYA Turczaninow - Cinnamon-vine. 2n = 140, 144.


Thickets, waste places. From China. [D. BATATAS Decaisne; D. OPPOSITIFOLIA - misapplied]


Dioscorea villosa Linnaeus - Wild Yam. 2n = 60.


Damp thickets, wet woods, roadsides.



DIOSPYROS (Family: Ebenaceae)


Diospyros virginiana Linnaeus - Persimmon. 2n = (60), 90.


Dry woods, old fields.



DIPHASIASTRUM (Family: Lycopodiaceae)


Diphasiastrum complanatum (Linnaeus) Holub - Northern Running Pine. 2n = 44, 46, 48.


Dry, open coniferous or mixed forests. [Lycopodium complanatum Linnaeus]    CONN herbarium image


Diphasiastrum digitatum (Dillenius ex A. Braun) Holub - Southern Running Pine. 2n = 46.


Usually dry woods, thickets, or open fields, in acid soils. [Lycopodium complanatum Linnaeus var. flabelliforme Fernald]    CONN herbarium image


Diphasiastrum sitchense (Ruprecht) Holub - Sitka Clubmoss. 2n = 46.


Alpine meadows, open rocky barrens, conifer woods (rarely). [Lycopodium sitchense Ruprecht]    CONN herbarium image


Diphasiastrum tristachyum (Pursh) Holub - Ground Cedar. 2n = 46.


Acid soils in open conifer or oak woods, thickets. [Lycopodium tristachyum Pursh]    CONN herbarium image


Diphasiastrum hybrids


Diphasiastrum digitatum (Dillenius ex A. Braun) Holub X D. X sabinifolium (Willdenow) Holub (pro species) - .



Diphasiastrum X habereri (House) Holub - .


[D. digitatum (Dillenius ex A. Braun) Holub X D. tristachyum (Pursh) Holub; Lycopodium X habereri House]


Diphasiastrum X issleri (Rouy) Holub - .


[D. alpinum (Linnaeus) Holub X D. complanatum (Linnaeus) Holub; Lycopodium X issleri (Rouy) Lawalrèe]


Diphasiastrum X sabinifolium (Willdenow) Holub - Savin-leaved Clubmoss.


Woods (often subalpine spruce), thickets, clearings. [D. sitchense (Ruprecht) Holub X D. tristachyum (Pursh) Holub; Lycopodium sabinifolium Willdenow]


Diphasiastrum X verecundum A.V. Gilman - .


[D. complanatum (Linnaeus) Holub X D. digitatum (Dillenius ex A. Braun) Holub]


Diphasiastrum X zeilleri (Rouy) Holub - .


[D. complanatum (Linnaeus) Holub X D. tristachyum (Pursh) Holub]



DIPLACHNE (Family: Poaceae)


Diplachne fusca (Linnaeus) P. de Beauvois ex Roemer & Schultes subsp. fascicularis P.M. Peterson & N. Snow - . 2n = 20, (40).


Salt marshes and seacoasts. [D. acuminata Nash; D. maritima E.P. Bicknell; Leptochloa fascicularis (Lamarck) A. Gray; L. fascicularis var. acuminata (Nash) Gleason); L. fascicularis var. maritima (E.P. Bicknell) Gleason]


DIPLACHNE FUSCA (Linnaeus) P. de Beauvois ex Roemer & Schultes subsp. UNINERVIA (J. Presl) P.M. Peterson & N. Snow - . 2n = 20.


Wool waste. From farther south and west, and South and Central America.



DIPLACUS (Family: Phrymaceae)


DIPLACUS BREVIPES (Bentham) G.L. Nesom - . 2n = 16.


Wool waste. From California and northwestern Mexico. [MIMULUS BREVIPES Bentham]



DIPLOTAXIS (Family: Brassicaceae)


DIPLOTAXIS MURALIS (Linnaeus) de Candolle - Indian-pipe. 2n = (18), (20), (22), 42, (44).


Waste places, roadsides. From Eurasia, Africa.


DIPLOTAXIS TENUIFOLIA (Linnaeus) de Candolle - Perennial Wall-rocket. 2n = (14), 22, (42).


Waste places, roadsides. From Eurasia, Africa.



DIPSACUS (Family: Caprifoliaceae)


DIPSACUS FULLONUM Linnaeus - Fuller’s Teasel. 2n = 16, 18.


Fields, roadsides, waste places. From Eurasia, northwestern Africa. [D. SYLVESTRIS Hudson]


DIPSACUS LACINIATUS Linnaeus - . 2n = (16), 18.


Waste places, roadsides. From Eurasia.



DIRCA (Family: Thymelaeaceae)


Dirca palustris Linnaeus Leatherwood - . 2n = ?


Damp, rich, deciduous or mixed woods.



DISTICHLIS (Family: Poaceae)


Distichlis spicata (Linnaeus) Greene var. spicata - Seashore Saltgrass. 2n = 40.


Salt marshes.



DITTRICHIA (Family: Asteraceae)


DITTRICHIA GRAVEOLENS (Linnaeus) Greuter - Stinkwort. 2n = (16), 18, (20).


Sandy, open, disturbed sites. From Eurasia, northern Africa. [INULA GRAVEOLENS (Linnaeus) Desfontaines]



DOELLINGERIA (Family: Asteraceae)


Doellingeria infirma (Michaux) Greene - Appalachian Flat-top Aster. 2n = 18.


Dry, open, deciduous, rocky woods. [Aster infirmus Michaux]


Doellingeria umbellata (Miller) Nees var. umbellata - Tall Flat-top White Aster. 2n = (9), 18.


Moist thickets and openings, meadows, swamps, bogs. [Aster umbellatus Miller]



DORONICUM (Family: Asteraceae)


DORONICUM PARDALIANCHES Linnaeus - Great Leopard’s-bane. 2n = 60, (120).


Open, disturbed ground. From Europe.



DRABA (Family: Brassicaceae)


Draba arabisans Michaux - Rock Whitlow-grass. 2n = 96.


Rock outcrops, usually calcareous or dolomitic.


Draba cana Rydberg - Ashy Whitlow-grass. 2n = 32.


Calcareous cliffs. [D. breweri S. Watson var. cana (Rydberg) Rollins; D. lanceolata - misapplied]


Draba glabella Pursh - Smooth Whitlow-grass. 2n = 64, (ca. 75), (80), (82).


Rock outcrops, usually calcareous. [D. glabella var. orthocarpa (Fernald & C.H. Knowlton) Fernald]


Draba incana Linnaeus - Twisted Whitlow-grass. 2n = 32.


Rock outcrops, usually calcareous.


Draba reptans (Lamarck) Fernald - Carolina Whitlow-grass. 2n = (16), 30, 32.


Fields, ledges, dry sands.


DRABA VERNA Linnaeus - Common Whitlow-grass. 2n = 14, 16, 20, 24, 28, 30, 32, 34, 36, 38, 40, 42, 52, 54, 58, 60, 64, 94.


Roadsides, fields, waste places, open, dry places. From Eurasia, northwestern Africa. [D. VERNA var. BOERHAAVII H.C. Hall]



DRACOCEPHALUM (Family: Lamiaceae)


DRACOCEPHALUM PARVIFLORUM Nuttall - American Dragonhead. 2n = 14.


Waste places, fields. From farther west.

DRACOCEPHALUM THYMIFLORUM Linnaeus - . 2n = 14, (20).


Wool waste. From Eurasia.




DROSERA (Family: Droseraceae)


Drosera anglica Hudson - . 2n = 40.


Calcareous bogs and fens in Sphagnum.


Drosera filiformis Rafinesque - Dew-thread. 2n = 20.


Sandy pond shores.


Drosera intermedia Hayne - . 2n = 20, (40).


Acidic sand or Sphagnum of bogs, swamps, shores. [D. longifolia Linnaeus - rejected name, sometimes applied to D. anglica Hudson specimens outside New England]


Drosera linearis Goldie - . 2n = 20.


Calcareous bogs and fens in Sphagnum.


Drosera rotundifolia Linnaeus - Round-leaved Sundew. 2n = 20, (40).


Sphagnous or acidic soil of bogs, swamps, fens, shores, seepages. [D. rotundifolia var. comosa Fernald]



DRYMOCALLIS (Family: Rosaceae)


Drymocallis arguta (Pursh) Rydberg - Tall Cinquefoil. 2n = 14.


Dry fields, open rocky woods, ledges, usually in calcareous soil. [Potentilla arguta Pursh]



DRYOPTERIS (Family: Dryopteridaceae)


Dryopteris campyloptera (Kunze) Clarkson - Mountain Wood Fern. 2n = 164.


Moist, cool woods, thickets, and banks. [D. austriaca (Jacquin) Woynar ex Schinz & Thellung var. austriaca; D. austriaca var. concordiana (Davenport) C.V. Morton; D. spinulosa (O.F. Müller) Watt var. americana (Fischer ex Kunze) Fernald; D. spinulosa var. concordiana (Davenport) Eastman]


Dryopteris carthusiana (Villars) H.P. Fuchs - Spinulose Wood Fern. 2n = 164.


Low, moist (occasionally dry) woods and thickets, stream banks, swamps. [D. austriaca (Jacquin) Woynar ex Schinz & Thellung var. spinulosa (O.F. Müller) Fiori; D. spinulosa (O.F. Müller) Watt var. spinulosa]


Dryopteris clintoniana (D.C. Eaton) Dowell - Clinton's Wood Fern. 2n = 246.


Wet (rarely only moist), often circumneutral woods and swamps. [D. cristata (Linnaeus) A. Gray var. clintoniana (D.C. Eaton) Underwood]


Dryopteris cristata (Linnaeus) A. Gray - Crested Wood Fern. 2n = (82), 164, (246).


Swamps, wet woods, marshes, boggy thickets.


Dryopteris filix-mas (Linnaeus) Schott - Male Fern. 2n = (41), (82), 164.


Rocky wooded slopes, cold ravines, rich woods, upland pastures in chiefly calcareous soil, trap, or slate.


Dryopteris fragrans (Linnaeus) Schott - Fragrant Cliff Fern. 2n = 82.


Dry, often north-facing and calcareous, cliffs, ledges, talus, and rocky banks. [D. fragrans var. remotiuscula (Komarov) Komarov]


Dryopteris goldieana (Hooker ex Goldie) A. Gray - Goldie's Fern. 2n = (41), 82.


Rich, moist woods, rocky slopes (mostly calcareous), ravines.


Dryopteris intermedia (Muhlenberg ex Willdenow) A. Gray - Glandular Wood Fern. 2n = (41), 82.


Moist, rocky woods and moist thickets. [D. austriaca (Jacquin) Woynar ex Schinz & Thellung var. intermedia (Muhlenberg ex Willdenow) C.V. Morton; D. spinulosa (O.F. Müller) Watt var. intermedia (Muhlenberg ex Willdenow) Underwood]


Dryopteris marginalis (Linnaeus) A. Gray - Marginal Shield Fern. 2n = 82.


Rocky, usually rich, wooded slopes, ravines.


Dryopteris hybrids

Dryopteris X benedictii Wherry - .


[D. carthusiana (Villars) H.P. Fuchs X D. clintoniana (D.C. Eaton) Dowell]


Dryopteris X boottii (Tuckerman) Underwood (pro species) - Boott's Wood Fern - .


[D. cristata (Linnaeus) A. Gray X D. intermedia (Muhlenberg ex Willdenow) A. Gray]. This common and widespread hybrid is not treated in Flora of North America (Flora of North America Editorial Committee 1993).


Dryopteris X burgessii B. Boivin - .


[D. clintoniana (D.C. Eaton) Dowell X D. marginalis (Linnaeus) A. Gray]


Dryopteris campyloptera (Kunze) Clarkson X D. intermedia (Muhlenberg ex Willdenow) A. Gray - .



Dryopteris campyloptera (Kunze) Clarkson X D. marginalis (Linnaeus) A. Gray - .



Dryopteris carthusiana (Villars) H.P. Fuchs X D. goldieana (Hooker ex Goldie) A. Gray - .


There is one known collection for this taxon. Other collections so identified are variations of D. goldieana (W.H. Wagner, Jr., pers. comm.).


Dryopteris clintoniana (D.C. Eaton) Dowell X D. cristata (Linnaeus) A. Gray - .



Dryopteris clintoniana (D.C. Eaton) Dowell X D. filix-mas (Linnaeus) Schott - .



Dryopteris clintoniana (D.C. Eaton) Dowell X D. goldieana (Hooker ex Goldie) A. Gray - .



Dryopteris X dowellii (Farwell) Wherry - .


[D. clintoniana (D.C. Eaton) Dowell X D. intermedia (Muhlenberg ex Willdenow) A. Gray]


Dryopteris filix-mas (Linnaeus) Schott X D. marginalis (Linnaeus) A. Gray - .



Dryopteris goldieana (Hooker ex Goldie) A. Gray X D. intermedia (Muhlenberg ex Willdenow) A. Gray - .



Dryopteris intermedia (Muhlenberg ex Willdenow) A. Gray X D. marginalis (Linnaeus) A. Gray - .



Dryopteris X neowherryi W.H. Wagner - .


[D. goldieana (Hooker ex Goldie) A. Gray X D. marginalis (Linnaeus) A. Gray]


Dryopteris X pittsfordensis Slosson - .


[D. carthusiana (Villars) H.P. Fuchs X D. marginalis (Linnaeus) A. Gray]


Dryopteris X slossoniae Wherry ex Lellinger - .


[D. cristata (Linnaeus) A. Gray X D. marginalis (Linnaeus) A. Gray]


Dryopteris X triploidea Wherry - .


Rocky or swampy (often rich) woods. [D. carthusiana (Villars) H.P. Fuchs X D. intermedia (Muhlenberg ex Willdenow) A. Gray; D. austriaca (Jacquin) Woynar ex Schinz & Thellung var. fructuosa (Gilbert) C.V. Morton; D. spinulosa (O.F. Müller) Watt var. fructuosa (Gilbert) Trudell] This common and widespread hybrid is not treated in Flora of North America (Flora of North America Editorial Committee 1993).


Dryopteris X uliginosa (A. Braun ex Döll) Druce - .


[D. carthusiana (Villars) H.P. Fuchs X D. cristata (Linnaeus) A. Gray]



DUCHESNEA (Family: Rosaceae)


DUCHESNEA INDICA (Andrews) Teschemacher var. INDICA - Mock Strawberry. 2n = (14), (28), (42), 84.


Waste places, railroads. From Asia. [POTENTILLA INDICA (Andrews) Th. Wolf]



DULICHIUM (Family: Cyperaceae)


Dulichium arundinaceum (Linnaeus) Britton var. arundinaceum Three-way Sedge - . 2n = 32.


Swamps, shores, bogs, marshes.



DYSPHANIA (Family: Amaranthaceae)


DYSPHANIA AMBROSIOIDES (Linnaeus) Mosyakin & Clemants - Mexican-tea. 2n = (8), (16), 32, (36), (64).


Waste places. From farther south. [CHENOPODIUM AMBROSIOIDES Linnaeus var. AMBROSIOIDES]


DYSPHANIA ANTHELMINTICA (Linnaeus) Mosyakin & Clemants - Wormseed. 2n = ?

Waste places, roadsides. From farther south. [CHENOPODIUM AMBROSIOIDES Linnaeus var. ANTHELMINTICUM (Linnaeus) A. Gray; This taxon is not mapped because it is not typically separated from C. AMBROSIOIDES in New England herbaria.]


DYSPHANIA BOTRYS (Linnaeus) Mosyakin & Clemants - Jerusalem-oak. 2n = 18.


Waste places, roadsides, shores. From Eurasia. [CHENOPODIUM BOTRYS Linnaeus]


DYSPHANIA GRAVEOLENS (Willdenow) Mosyakin & Clemants - Fetid Goosefoot. 2n = ?


Waste places. From farther west. [CHENOPODIUM GRAVEOLENS Willdenow]


DYSPHANIA MULTIFIDA (Linnaeus) Mosyakin & Clemants - Scented Goosefoot. 2n = 32, (36).


Waste places. From South America. [CHENOPODIUM MULTIFIDUM Linnaeus; ROUBIEVA MULTIFIDA (Linnaeus) Moquin-Tandon]


DYSPHANIA PUMILIO (R. Brown) Mosyakin & Clemants - Small Crumbweed. 2n = (16), 18.


Waste places, sidewalks, fields. From Australia. [CHENOPODIUM CARINATUM - misapplied; C. PUMILIO R. Brown]



DYSSODIA (Family: Asteraceae)


DYSSODIA PAPPOSA (Ventenat) Hitchcock - Fetid Marigold. 2n = 26.


Wool waste, roadsides, gravelly, river shores. From farther west.





Designed by Ray Angelo. Revised Jan. 19, 2017