Atlas of the Flora of New England

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Genera - M

Macleaya
Maclura
Madia
Magnolia
Maianthemum
Malaxis
Malus
Malva
Malvastrum
Marrubium
Marsilea
Matricaria (see also Tripleurospermum)
Matteuccia
Mazus
Medeola
Medicago
Megalodonta (See Bidens)
Melampyrum
Melilotus
Melissa
Menispermum
Mentha
Mentzelia
Menyanthes
Mercurialis
Mertensia
Micranthes
Microseris
Microstegium
Microthlaspi
Mikania
Milium
Millegrana (see Radiola)
Mimulus (see also Diplacus & Erythranthe)
Minuartia
Mirabilis
Miscanthus
Misopates
Mitchella
Mitella
Moehringia
Molinia
Mollugo
Momordica
Monarda
Moneses
Monolepis
Monotropa
Montia (see also Claytonia)
Morella
Morus
Muhlenbergia
Mulgedium (see Lactuca)
Muscari
Mycelis
Myosotis
Myosoton
Myosurus
Myrica (see also Morella)
Myriophyllum
Myriopteris
Myrrhis


MACLEAYA (Family: Papaveraceae)


MACLEAYA CORDATA (Willdenow) R. Brown - Plume-poppy. 2n = (10), 20.


Waste places, thickets, roadsides. From eastern Asia.



MACLURA (Family: Moraceae)


MACLURA POMIFERA (Rafinesque) C.K. Schneider - Osage-orange. 2n = 56.


Fields, roadsides. From farther west and south.



MADIA (Family: Asteraceae)


MADIA GLOMERATA Hooker - Mountain Tarweed. 2n = 28.


Waste places, roadsides. From farther west.


MADIA GRACILIS (Smith) D.D. Keck - 2n = 32, 48.


Fields, waste places. From farther west. [M. DISSITIFLORA (Nuttall) Torrey & A. Gray; M. SATIVA Molina subsp. DISSITIFLORA (Nuttall) D.D. Keck]


MADIA SATIVA Molina - 2n = 32.


Fields, waste places, roadsides. From farther west. [M. SATIVA var. CONGESTA Torrey & A. Gray]



MAGNOLIA (Family: Magnoliaceae)


Magnolia acuminata (Linnaeus) Linnaeus - Cucumber-tree. 2n = 76.


Rich woods.


MAGNOLIA TRIPETALA (Linnaeus) Linnaeus - Umbrella-tree. 2n = 38.


Escaped in rich woods. From farther south and west.


Magnolia virginiana Linnaeus - Sweet-bay. 2n = 38, (76).


Swamps, low woods.



MAIANTHEMUM (Family: Asparagaceae)


Maianthemum canadense Desfontaines - Canada Mayflower. 2n = 36, (54), (72).


Woods, clearings. [M. canadense var. interius Fernald]


Maianthemum racemosum (Linnaeus) Link subsp. racemosum - False Solomon's-seal. 2n = 36, (72), (144).


Woods, clearings. [Smilacina racemosa (Linnaeus) Desfontaines; S. racemosa var. cylindrata Fernald]


Maianthemum stellatum (Linnaeus) Link - . 2n = 36, (54).


Sandy soil of shores, hillsides, fields, thickets. [Smilacina stellata (Linnaeus) Desfontaines; S. stellata var. crassa Victorin]


Maianthemum trifolium (Linnaeus) Sloboda - . 2n = 36.


Sphagnum bogs, sphagnous shores and woods. [Smilacina trifolia (Linnaeus) Desfontaines]



MALAXIS (Family: Orchidaceae)


Malaxis bayardii Fernald - . 2n = ?.


Dry, sandy woods and clearings.


Malaxis monophyllos (Linnaeus) Swartz var. brachypoda (A. Gray) F. Morris & E.A. Eames - . 2n = 28.


Thuja swamps and thickets. [M. brachypoda (A. Gray) Fernald]


Malaxis unifolia Michaux - Green Adder's-mouth. 2n = ?.


Woods, borders of swamps or bogs.



MALUS (Family: Rosaceae)


MALUS BACCATA (Linnaeus) Borkhausen - Siberian Crabapple. 2n = 34.


Roadsides, woodland margins, thickets, clearings, sandy, waste areas. From eastern and southern Asia. [PYRUS BACCATA Linnaeus]


MALUS FLORIBUNDA Siebold ex Van Houtte - Japanese Flowering Crabapple. 2n = 34.


Fields, woodland margins. Origin unknown.


MALUS PRUNIFOLIA (Willdenow) Borkhausen - Chinese Apple. 2n = 34, (51).


Waste places, roadsides, thickets, wooded terraces. From China. [PYRUS PRUNIFOLIA Willdenow]


MALUS PUMILA Miller - Common Apple. 2n = 34, (51), (68).


Open woods, thickets, fields, roadsides, woodland margins, clearings. From Eurasia. [M. DOMESTICA – misapplied; M. SYLVESTRIS Miller; PYRUS MALUS Linnaeus]


MALUS TORINGO (Siebold) de Vriese - Toringo Crabapple. 2n = (34), 51, (68), (85).


Rich woods, railroads, thickets, swampy woodland margins, open, rocky knolls. From eastern Asia. [M. SARGENTII Rehder; M. SIEBOLDII (Regel) Rehder -- illegitiate name; PYRUS SIEBOLDII Regel -- illegitimate name]


Malus hybrids

MALUS X ADSTRINGENS Zabel - .


[M. BACCATA (Linnaeus) Borkhausen X M. PUMILA Miller]


MALUS X ARNOLDIANA (Rehder) Sargent ex Rehder - .


[M. BACCATA (Linnaeus) Borkhausen X M. FLORIBUNDA Siebold ex Van Houtte; PYRUS ARNOLDIANA (Rehder) Bean]


MALUS X MAGDEBURGENSIS Hartwig - .


[M. PUMILA Miller X M. SPECTABILIS (Aiton) Borkhausen]


MALUS X MICROMALUS Makino (pro species) - .


[? M. BACCATA (Linnaeus) Borkhausen X M. SPECTABILIS (Aiton) Borkhausen]


MALUS X SOULARDII (L.H. Bailey) Britton (pro species) - .


[? M. IOENSIS (Alph. Wood) Britton X M. PUMILA Miller; PYRUS X SOULARDII L.H. Bailey]



MALVA (Family: Malvaceae)


MALVA ALCEA Linnaeus - Vervain Mallow. 2n = 84.


Roadsides, waste places. From Europe, Turkey.


MALVA MOSCHATA Linnaeus - Musk Mallow. 2n = 42.


Roadsides, fields, waste places. From Europe, Turkey.


MALVA NEGLECTA Wallroth - Common Mallow. 2n = 42, (84).


Waste places, roadsides, fields. From Eurasia, northern Africa. [M. ROTUNDIFOLIA Linnaeus - rejected name]


MALVA PARVIFLORA Linnaeus - Cheeseweed. 2n = 42.


Waste places. From Eurasia, northern Africa.


MALVA PUSILLA Smith - Dwarf Mallow. 2n = 42.


Fields, waste places, roadsides. From Eurasia. [M. ROTUNDIFOLIA Linnaeus - rejected name]


MALVA SYLVESTRIS Linnaeus - High Mallow. 2n = 42.


Waste places, roadsides. From Eurasia, northern Africa. [M. SYLVESTRIS var. MAURITANIA (Linnaeus) Boissier]


MALVA VERTICILLATA Linnaeus - Chinese Mallow. 2n = 84, 112, (120).


Waste places, roadsides. From China. [M. VERTICILLATA var. CRISPA Linnaeus; M. CRISPA (Linnaeus) Linnaeus]



MALVASTRUM (Family: Malvaceae)


MALVASTRUM COROMANDELIANUM (Linnaeus) Garcke - . 2n = 24.


Wool waste. From Texas, Mexico, Central America, Caribbean, South America.



MARRUBIUM (Family: Lamiaceae)


MARRUBIUM VULGARE Linnaeus - Common Horehound. 2n = 34, (36).


Waste places, roadsides. From Eurasia, northwestern Africa.



MARSILEA (Family: Marsileaceae)


MARSILEA QUADRIFOLIA Linnaeus - Water Clover. 2n = 40.


Lakes, ponds and quiet streams. From Europe.



MATRICARIA (Family: Asteraceae)


MATRICARIA CHAMOMILLA Linnaeus - German Chamomile. 2n = 18, (36).


Waste places, roadsides. From Eurasia, northern Africa. [M. CHAMOMILLA var. CORONATA J. Gay ex Boissier; M. RECUTITA Linnaeus]


MATRICARIA DISCOIDEA de Candolle - Pineapple-weed. 2n = 18.


Waste places, roadsides, fields. From farther west. [M. MATRICARIOIDES - misapplied]



MATTEUCCIA (Family: Onocleaceae)


Matteuccia struthiopteris (Linnaeus) Todaro - Ostrich Fern. 2n = 78, 80.


Alluvium, bottomland thickets, swamps and moist woods, often in circumneutral soils. [M. struthiopteris var. pensylvanica (Willdenow) C.V. Morton; M. pensylvanica (Willdenow) Raymond; Pteretis pensylvanica (Willdenow) Fernald]



MAZUS (Family: Mazaceae)


MAZUS PUMILUS (Burman (son)) Steenis - . 2n = (16), (24), 40, (52).


Waste places. From eastern Asia, India. [M. JAPONICUS (Thunberg) Kuntze]



MEDEOLA (Family: Liliaceae)


Medeola virginiana Linnaeus - Indian Cucumber Root. 2n = 14, (21).


Rich woods.



MEDICAGO (Family: Fabaceae)


MEDICAGO ARABICA (Linnaeus) Hudson - Spotted Medick. 2n = 16.


Waste places. From Eurasia, northern Africa.


MEDICAGO LACINIATA (Linnaeus) Miller - . 2n = 16.


Wool waste, waste places. From south central and southwestern Asia, Africa. [TRIGONELLA LACINIATA – misapplied]


MEDICAGO LUPULINA Linnaeus - Black Medick. 2n = 16, (32).


Roadsides, waste places, fields. From Eurasia, northern Africa. [M. LUPULINA var. GLANDULOSA Neilreich]


MEDICAGO MINIMA (Linnaeus) Linnaeus ex Bartalini - Bur Medick. 2n = 16.


Wool waste, waste places, fields, dry, open soil. From Eurasia, northern Africa. [M. MINIMA var. COMPACTA Neyraut; M. MINIMA var. LONGISETA de Candolle]


MEDICAGO MONANTHA (C.A. Meyer) Trautvetter - . 2n = (30), 44, (48).


Waste places. From south central and southwestern Asia.


MEDICAGO POLYMORPHA Linnaeus - Toothed Medick. 2n = 14, 16.


Wool waste, waste places. From Eurasia, northern Africa. [M. POLYMORPHA var. VULGARIS – superfluous name]


MEDICAGO PRAECOX de Candolle - Mediterranean Medick. 2n = 14, 16.


Wool waste. From northern and eastern Mediterranean.


MEDICAGO RIGIDULA (Linnaeus) Allioni - Tifton Medick. 2n = 14, 16.


Wool waste. From Eurasia, northern Africa. [M. AGRESTIS Tenore]


MEDICAGO SATIVA Linnaeus subsp. SATIVA - Alfalfa. 2n = 32.


Roadsides, fields, waste places, meadows. From southwestern Asia.


MEDICAGO SATIVA Linnaeus subsp. FALCATA (Linnaeus) Arcangeli - Yellow Alfalfa. 2n = 16, 32.


Roadsides, waste places, wool waste. From Eurasia, northern Africa. [M. FALCATA Linnaeus]


MEDICAGO SATIVA Linnaeus subsp. VARIA (Martyn) Arcangeli - Bastard Medick. 2n = 32.


Roadsides, fields, waste places. From Eurasia. [M. SATIVA subsp. SATIVA X M. SATIVA subsp. FALCATA (Linnaeus) Arcangeli; M. SYLVESTRIS Fries]




MELAMPYRUM (Family: Orobanchaceae)


Melampyrum lineare Desrousseaux var. lineare - American Cow-wheat. 2n = 18.


Dry woods, grassy or rocky fields and clearings, roadsides, thickets of lowbush blueberries. [M. lineare var. americanum (Michaux) Beauverd]


Melampyrum lineare Desrousseaux var. latifolium W.P.C. Barton - . 2n = ?


Woods.


Melampyrum lineare Desrousseaux var. pectinatum (Pennell) Fernald - . 2n = ?


Dry, sandy pine woods or oak-scrub.



MELILOTUS (Family: Fabaceae)


MELILOTUS ALBUS Medikus - White Sweet-clover. 2n = 16, (32).


Roadsides, waste places, fields, rich woods. From Eurasia.


MELILOTUS INDICUS (Linnaeus) Allioni - . 2n = 16, (18).


Waste places, roadsides, fields, riverbanks. From Eurasia, northern Africa.


MELILOTUS OFFICINALIS (Linnaeus) Lamarck - Yellow Sweet-clover. 2n = 16.


Roadsides, waste places, fields, railroads. From Eurasia.



MELISSA (Family: Lamiaceae)


MELISSA OFFICINALIS Linnaeus - Common Balm. 2n = 32, 64.


Waste places, roadsides. From Eurasia, northwestern Africa.



MENISPERMUM (Family: Menispermaceae)


Menispermum canadense Linnaeus - Moonseed. 2n = 52.


Rich woods, thickets, stream banks.



MENTHA (Family: Lamiaceae)


MENTHA AQUATICA Linnaeus var. CITRATA (Ehrhart) Fresenius - Bergamot Mint. 2n = 96.


Waste places, roadsides. From Europe. [M. CITRATA Ehrhart]


MENTHA ARVENSIS Linnaeus subsp. PARIETARIIFOLIA (Becker) Briquet - Ginger Mint. 2n = 54, (60), 72.


Wet places, roadsides, fields, waste places. From Europe. [M. GENTILIS Linnaeus]


Mentha canadensis Linnaeus - American Corn Mint. 2n = (36), (54), 72, 96.


Moist, open soils, shores, fields, roadsides. [M. canadensis var. villosa Bentham; M. arvensis var. arvensis misapplied; M. arvensis Linnaeus var. canadensis (Linnaeus) Kuntze; M. arvensis var. villosa (Bentham) S.R. Stewart]


MENTHA SPICATA Linnaeus var. SPICATA - Spearmint. 2n = 36, 48, (54), (64), (72), (84).


Wet thickets, wet fields, shores, roadsides, waste places. From Europe. [M. LONGIFOLIA var. LONGIFOLIA misapplied; M. LONGIFOLIA var. MOLLISSIMA misapplied]


MENTHA SUAVEOLENS Ehrhart subsp. SUAVEOLENS (Becker) Briquet - Apple Mint. 2n = (18), 24, (42).


Swales, waste places. From Europe.


Mentha hybrids

MENTHA X GRACILIS Sole (pro species) - Scotch Spearmint.


[M. ARVENSIS Linnaeus X M. SPICATA Linnaeus; M. CARDIACA J. Gerarde ex Baker]


MENTHA X PIPERITA Linnaeus (pro species) - Peppermint.


[M. AQUATICA Linnaeus X M. SPICATA Linnaeus; M. CRISPA Linnaeus]


MENTHA X ROTUNDIFOLIA (Linnaeus) Hudson (pro species) - .


[M. LONGIFOLIA (Linnaeus) Linnaeus X M. SUAVEOLENS Ehrhart]


MENTHA X SMITHIANA R.A. Graham - .


[M. AQUATICA Linnaeus X M. ARVENSIS Linnaeus X M. SPICATA Linnaeus]


MENTHA X VERTICILLATA Linnaeus (pro species) - .


[M. AQUATICA Linnaeus X M. ARVENSIS Linnaeus]


MENTHA X VILLOSA Hudson (pro species) - .


[M. SPICATA Linnaeus X M. SUAVEOLENS Ehrhart; M. ALOPECUROIDES Hull]



MENTZELIA (Family: Loasaceae)


MENTZELIA OLIGOSPERMA Nuttall ex Sims - . 2n = 22.


Wool waste. From farther west.



MENYANTHES (Family: Menyanthaceae)


Menyanthes trifoliata Linnaeus - Buckbean. 2n = 54, (108).


Bogs, pond margins, shallow water. [M. trifoliata var. minor Fernald]



MERCURIALIS (Family: Euphorbiaceae)


MERCURIALIS ANNUA Linnaeus - Herb Mercury. 2n = 16, (32), (48), (56), (64), (80), (96), (112).


Waste places. From Eurasia, northern Africa.



MERTENSIA (Family: Boraginaceae)


Mertensia maritima (Linnaeus) Gray subsp. tenella (Th. Fries) Elven & Skarpaas - . 2n = 24.


Sea beaches, often gravelly.


MERTENSIA PANICULATA (Aiton) G. Don ex Link - . 2n = 24, 48, 72.


Riverbanks. From farther west.

MERTENSIA VIRGINICA (Linnaeus) Persoon ex Link - Virginia Cowslip. 2n = 24.


Waste places. From farther west and south.



MICRANTHES (Family: Saxifragaceae)


Micranthes foliolosa (R. Brown) Gornall - Leafy Saxifrage. 2n = (40), 56.


Mossy, alpine rocks. [Saxifraga stellaris Linnaeus var. comosa Retzius]


Micranthes pensylvanica (Linnaeus) Haworth - Swamp Saxifrage. 2n = 56, 84, 112.


Swamps, wet meadows, boggy thickets. [Saxifraga pensylvanica Linnaeus var. pensylvanica; S. pensylvanica var. purpuripetala (A.M. Johnson) Bush]


Micranthes virginiensis (Michaux) Small - Early Saxifrage. 2n = 20, 28, (38).


Open rocky woods, rock outcrops, ledges, rocky hillsides. [Saxifraga virginiensis Michaux]



MICROSERIS (Family: Asteraceae)


MICROSERIS DOUGLASII (de Candolle) Schultz-Bipontinus subsp. DOUGLASII - 2n = 18.


Wool waste. From farther west.



MICROSTEGIUM (Family: Poaceae)


MICROSTEGIUM VIMINEUM (Trinius) A. Camus - . 2n = 40.


Roadsides. From tropical Asia.



MICROTHLASPI (Family: Brassicaceae)


MICROTHLASPI PERFOLIATUM (Linnaeus) F.K. Meyer - Perfoliate Penny-cress. 2n = 14, 28, 42, (70).


Fields, waste places. From Eurasia, northern Africa. [THLASPI PERFOLIATUM Linnaeus]



MIKANIA (Family: Asteraceae)


Mikania scandens (Linnaeus) Willdenow - Climbing Hempweed. 2n = (30), (36), 38.


Wet thickets, swamps, stream banks, pond or lake margins, marshes.



MILIUM (Family: Poaceae)


Milium effusum Linnaeus - . 2n = (14), (26), 28, (42).


Rich woods.



MIMULUS (Family: Phrymaceae)


Mimulus alatus Aiton - . 2n = 22.


Muddy or marshy shores, meadows, alluvial soil.


Mimulus ringens Linnaeus var. ringens - . 2n = 16, 22, 24.


Muddy shores, swamp margins, meadows, marshy shores, wet woods. [M. ringens var. minthoides (Greene) A.L. Grant]


Mimulus ringens Linnaeus var. colpophilus Fernald - . 2n = ?


Estuaries, marshy or sandy river shores, river meadows.



MINUARTIA (Family: Caryophyllaceae)


Minuartia caroliniana (Walter) Mattfeld - Pine-barren Sandwort. 2n = ?


Dry, open, sandy soil. [Arenaria caroliniana Walter]


Minuartia glabra (Michaux) Mattfeld - Appalachian Stitchwort. 2n = 20.


Siliceous, wooded outcrops. [Arenaria groenlandica (Retzius) Sprengel var. glabra (Michaux) Fernald]


Minuartia groenlandica (Retzius) Ostenfeld - Mountain Sandwort. 2n = 20.


Granitic ledges. [Arenaria groenlandica (Retzius) Sprengel var. groenlandica]


Minuartia marcescens (Fernald) House - Serpentine Sandwort. 2n = ?


Magnesium ledges. [Arenaria marcescens Fernald]


Minuartia michauxii (Fenzel) Farwell - Rock Sandwort. 2n = 30, 44.


Dry, calcareous ledges. [Arenaria stricta Michaux]


Minuartia rubella (Wahlenberg) Hiern - Boreal Sandwort. 2n = 24, (26).


Calcareous rocks. [Arenaria rubella (Wahlenberg) Smith]



MIRABILIS (Family: Nyctaginaceae)


MIRABILIS ALBIDA (Walter) Heimerl - . 2n = 58.


Dry, sandy waste places, roadsides. From farther west. [M. HIRSUTA (Pursh) MacMillan]


MIRABILIS JALAPA Linnaeus var. JALAPA - Marvel-of-Peru. 2n = 54, 58, (116).


Waste places, roadsides. From Mexico.


MIRABILIS LINEARIS (Pursh) Heimerl var. LINEARIS - . 2n = 40, 52.


Dry, open soil, disturbed areas. From farther west.


MIRABILIS NYCTAGINEA (Michaux) MacMillan - Wild Four-o'-clock. 2n = (52), 58.


Waste places, railroads, cracks in urban pavements. From farther west.



MISCANTHUS (Family: Poaceae)


MISCANTHUS SACCHARIFLORUS (Maximowicz) Bentham & Hooker (son) ex Franchet - Amur Silvergrass. 2n= 38, 40, 57, 64, 76, 95.


Roadsides, waste places. From eastern Asia.


MISCANTHUS SINENSIS Andersson - Eulalia. 2n = 28, 38, 40, 46.


Roadsides, old fields. From China.



MISOPATES (Family: Plantaginaceae)


MISOPATES ORONTIUM (Linnaeus) Rafinesque - Weasel’s-snout. 2n = (14), 16, (32).


Waste places, moist ditches. From Eurasia, northern and eastern Africa. [ANTIRRHINUM ORONTIUM Linnaeus]



MITCHELLA (Family: Rubiaceae)


Mitchella repens Linnaeus - Partridge-berry. 2n = 22.


Woods.



MITELLA (Family: Saxifragaceae)


Mitella diphylla Linnaeus - Fairy-cup. 2n = 14.


Rich woods.


Mitella nuda Linnaeus - Naked Miterwort. 2n = 14, 28.


Wet woods, swamps, often in moss. [M. prostrata Michaux]



MOEHRINGIA (Family: Caryophyllaceae)


Moehringia lateriflora (Linnaeus) Fenzl - Grove Sandwort. 2n = (24), 48, (50).


Woods, meadows, gravelly shores. [Arenaria lateriflora Linnaeus]


Moehringia macrophylla (Hooker) Fenzl - 2n = 24, 48.


Shaded ledges in humus, often with Hypnum, chiefly in magnesium or basic areas. [Arenaria macrophylla Hooker]



MOLINIA (Family: Poaceae)


MOLINIA CAERULEA (Linnaeus) Moench - Moorgrass. 2n = (18), 36, (90).


Dry fields. From Europe.



MOLLUGO (Family: Molluginaceae)


Mollugo verticillata Linnaeus - Carpetweed. 2n = 64.


Waste places, roadsides, fields, sandy riverbanks.



MOMORDICA (Family: Cucurbitaceae)


MOMORDICA CHARANTIA Linnaeus - Bitter Melon. 2n = 22.


Waste places. From tropical Africa, tropical Asia, northeastern Australia, south central and southwestern Pacific.



MONARDA (Family: Lamiaceae)


MONARDA CLINOPODIA Linnaeus - Basil Bee-balm. 2n = 36.


Roadsides, low woodlands. From farther south and west.


MONARDA DIDYMA Linnaeus - Oswego-tea. 2n = (32), 36.


Roadsides, waste places, woodland margins, thickets, fields, clearings. From farther south and west.


Monarda fistulosa Linnaeus var. fistulosa - Wild Bergamot. 2n = (18), (32), 36.


Roadsides, woodlands, clearings, thickets, meadows, fields, railroads, streambanks, waste places.


Monarda fistulosa Linnaeus var. mollis (Linnaeus) Bentham - . 2n = 32, 36.


Fields, roadsides, open woodlands, fencerows, waste places.


Monarda fistulosa Linnaeus var. rubra A. Gray - . 2n = ?


Roadsides.


MONARDA MEDIA Willdenow - Purple Bergamot. 2n = (32), 36.


Roadsides, thickets, fencerows, woodland margins. From farther west and south. [M. FISTULOSA var. RUBRA misapplied]


Monarda punctata Linnaeus var. villicaulis (Pennell) E.J. Palmer & Steyermark - . 2n = 22, 24.


Sandy fields and roadsides, dry, sandy soil.



MONESES (Family: Ericaceae)


Moneses uniflora (Linnaeus) A. Gray - Wood-nymph. 2n = 22, 24, 26, 32.


Dry, mossy, rich or rocky woods.



MONOLEPIS (Family: Amaranthaceae)


MONOLEPIS NUTTALLIANA (Schultes) Greene - Povertyweed. 2n = 18.


Waste places. From farther west. [M. CHENOPODIOIDES Moquin-Tandon]



MONOTROPA (Family: Ericaceae)


Monotropa hypopitys Linnaeus - Pinesap. 2n = (16), 48.


Leaf mold in woods. [Hypopitys lanuginosa (Michaux) Rafinesque; H. monotropa Crantz]


Monotropa uniflora Linnaeus - Indian-pipe. 2n = 32, 48.


Leaf mold in woods.



MONTIA (Family: Montlaceae)


Montia fontana Linnaeus - Water Blinks. 2n = (18), 20, (40).


Moist woods, springy slopes. [M. lamprosperma Chamisso]


MONTIA LINEARIS (Douglas) Greene - . 2n = 24, 28.


Fields. From western North America.



MORELLA (Family: Myricaceae)


Morella pensylvanica (Mirbel) Kartesz - Northern Bayberry. 2n = 16.


Woodland borders, thickets, ledges, on sterile soil, primarily near the coast. [Myrica pensylvanica Mirbel]



MORUS (Family: Moraceae)


MORUS ALBA Linnaeus - White Mulberry. 2n = 28, (42).


Waste areas, roadsides. From eastern Asia.


Morus rubra Linnaeus - Red Mulberry. 2n = 28.


Rich woods, in calcareous soil, riverbanks.



MUHLENBERGIA (Family: Poaceae)


MUHLENBERGIA ALOPECUROIDES (Grisebach) P.M. Peterson & Columbus - Bristly Wolftail. 2n = 40.


Wool waste. From farther west. [LYCURUS SETOSUS (Nuttall) C. Reeder; Vouchers originally misidentified as LYCURUS PHLEOIDES Kunth.]


Muhlenbergia capillaris (Lamarck) Trinius - Hairgrass. 2n = ?


Dry, exposed ledges.


Muhlenbergia frondosa (Poiret) Fernald - . 2n = 40.


Damp, open woods, shores.


Muhlenbergia glomerata (Willdenow) Trinius - Marsh Muhly. 2n = 20, 40.


Swamps, meadows, bogs. [M. glomerata var. cinnoides (Link) F.J. Hermann]


Muhlenbergia mexicana (Linnaeus) Trinius var. mexicana - . 2n = 40.


Shores, wet woods, roadsides.


MUHLENBERGIA RACEMOSA (Michaux) Britton, Sterns & Poggenburg - . 2n = 40.


Dry soil, railroads. From farther west.


Muhlenbergia richardsonis (Trinius) Rydberg - Mat Muhly. 2n = 40.


Gravelly river shores.


Muhlenbergia schreberi J.F. Gmelin - Nimble Will. 2n = 20, 40.


Disturbed, damp or wet places, lawns, gardens, roadsides.


Muhlenbergia sobolifera (Muhlenberg ex Willdenow) Trinius - . 2n = 40.


Dry woods (often rocky and calcareous).


Muhlenbergia sylvatica (Torrey) Torrey ex A. Gray - . 2n = 40.


Gravelly shores, rich woods. [M. sylvatica var. robusta Fernald]


Muhlenbergia tenuiflora (Willdenow) Britton, Sterns & Poggenburg - . 2n = 40.


Rocky woods, shaded cliffs.


Muhlenbergia uniflora (Muhlenberg) Fernald - . 2n = ca. 42.


Bogs, meadows, sandy shores, roadsides.



MUSCARI (Family: Asparagaceae)


MUSCARI BOTRYOIDES (Linnaeus) Miller - Grape-hyacinth. 2n = 18, 36, (48), (54).


Pastures, fields, roadsides, waste places. From Europe.


MUSCARI NEGLECTUM Gussone ex Tenore - Blue-bottle. 2n = 18, 27, (28), 36, 45, 54, (63), (72).


Fields, roadsides, lawns, waste places. From Europe. [M. ATLANTICUM Boissier & Reuter; M. RACEMOSUM (Linnaeus) Lamarck & de Candolle]



MYCELIS (Family: Asteraceae)


MYCELIS MURALIS (Linnaeus) Dumortier - 2n = 18.


Roadsides, woodland margins or openings, waste places. From Eurasia, northern Africa. [LACTUCA MURALIS (Linnaeus) Gaertner - invalid name]



MYOSOTIS (Family: Boraginaceae)


MYOSOTIS ARVENSIS (Linnaeus) Hill - . 2n = (36), 48, 52, (54), (66).


Roadsides, waste places, fields. From Eurasia, northwestern Africa.


Myosotis laxa Lehmann - Smaller Forget-me-not. 2n = 84, 88.


Springs, muddy or gravelly shores.


MYOSOTIS SCORPIOIDES Linnaeus - True Forget-me-not. 2n = (22), (44), (64), 66.


Springs, muddy shores, quiet water, wet ditches, swampy meadows, and other wet ground. From Eurasia.


MYOSOTIS STRICTA Link ex Roemer & Schultes - . 2n = (24), (36), 48.


Old fields, roadsides, waste places, often in rocky soil. From Eurasia, northwestern Africa. [M. MICRANTHA misapplied]


MYOSOTIS SYLVATICA Hoffmann - Garden Forget-me-not. 2n = (14), 18, (20), (22), (24), (32), (48).


Roadsides, waste places. From Eurasia.


Myosotis verna Nuttall - Early Scorpion-grass. 2n = ?


Dry, rocky woodlands, ledges, open banks.



MYOSOTON (Family: Caryophyllaceae)


MYOSOTON AQUATICUM (Linnaeus) Moench - Water Chickweed. 2n = (20), 28, (29).


Stream banks, meadows, alluvial woods. From Eurasia. [Stellaria aquatica (Linnaeus) Scopoli]



MYOSURUS (Family: Ranunculaceae)


MYOSURUS MINIMUS Linnaeus - Little Mousetail. 2n = 16, (28).


Fields. From farther west and south.



MYRICA (Family: Myricaceae)


Myrica gale Linnaeus - Sweet Gale. 2n = (16), 48, (80), (96).


Shallow water at edges of ponds, lakes, streams, swamps, bogs. [M. gale var. subglabra (A. Chevalier) Fernald]



MYRIOPHYLLUM (Family: Haloragaceae)


Myriophyllum alterniflorum de Candolle - . 2n = 14.


Quiet water of ponds, lakes and streams.


MYRIOPHYLLUM AQUATICUM (Vellozo) Verdcourt - Parrot’s-feather. 2n = ca. 48.


Quiet water of ponds and streams. From South America.


Myriophyllum farwellii Morong - . 2n = ?


Quiet water of ponds and streams.


MYRIOPHYLLUM HETEROPHYLLUM Michaux - . 2n = ?


Quiet water of ponds, lakes and streams. From farther south and west.


Myriophyllum humile (Rafinesque) Morong - . 2n = ?


Quiet water of ponds, lakes and streams, shorelines of receding waters.


Myriophyllum pinnatum (Walter) Britton, Sterns & Poggenburg - . 2n = ?


Peaty or muddy shores, shallow waters.


Myriophyllum sibiricum Komarov - Siberian Water-milfoil. 2n = (14), 42.


Quiet waters of lakes, ponds, and streams, in circumneutral or calcareous water. [M. exalbescens Fernald]


MYRIOPHYLLUM SPICATUM Linnaeus - Eurasian Water-milfoil. 2n = 28, 36, 42.


Quiet waters of lakes, ponds, and streams, in circumneutral or calcareous water. From Eurasia, northwestern Africa.


Myriophyllum tenellum Bigelow - . 2n = 14.


Shallow water, or sandy or muddy shores, of of circumneutral or acidic ponds and lakes.


Myriophyllum verticillatum Linnaeus - . 2n = 28, (42).


Quiet water of ponds, lakes and streams. [M. verticillatum var. pectinatum Wallroth]


Myriophyllum hybrids

MYRIOPHYLLUM HETEROPHYLLUM Michaux X M. LAXUM Shuttleworth ex Chapman - .



MYRIOPHYLLUM HETEROPHYLLUM Michaux X M. pinnatum (Walter) Britton, Sterns & Poggenburg - .




MYRIOPTERIS (Family: Pteridaceae)


Myriopteris lanosa (Michaux) Grusz & Windham - Hairy Lip Fern. 2n = 60.


Rocks and cliffs, calcareous or siliceous. [Cheilanthes lanosa (Michaux) D.C. Eaton; C. vestita (Sprengel) Swartz]



MYRRHIS (Family: Apiaceae)


MYRRHIS ODORATA (Linnaeus) Scopoli - Garden Myrrh. 2n = 22.


Roadsides. From Europe.





Designed by Ray Angelo. Revised Jan. 19, 2017