Atlas of the flora of New England: Poaceae Genera (M-R)

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Poaceae:   Introduction   Genera A-C   Genera D-L   Genera M-R   Genera S-Z   References


MIBORA

MIBORA MINIMA (Linnaeus) Desvaux - . 2n = 14.


Nurseries. From Europe.



MICROSTEGIUM

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


Roadsides. From tropical Asia.



MILIUM

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


Rich woods.



MISCANTHUS

MISCANTHUS SACCHARIFLORUS (Maximowicz) Hackel - Amur Silvergrass. 2n= 38-95.


Roadsides, waste places. From eastern Asia.

MISCANTHUS SINENSIS Andersson - Eulalia. 2n = 35-57.


Roadsides, old fields. From China.



MOLINIA

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


Dry fields. From Europe.



MUHLENBERGIA

Muhlenbergia capillaris (Lamarck) Trinius - Hairgrass.


Dry, exposed ledges.

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


Damp, open woods, shores.

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


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

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


Dry woods (often rocky and calcareous).

Muhlenbergia sylvatica Torrey - . 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.



NARDUS

NARDUS STRICTA Linnaeus - Moor Matgrass. 2n = 16, 26, 27, ca. 28, 30.


Old fields, grassy riverbanks. From Europe.



ORYZOPSIS

Oryzopsis asperifolia Michaux - . 2n = 46, 48.


Dry woods.

Oryzopsis canadensis (Poiret) Torrey - . 2n =22.


Dry, sandy or rocky woods.

Oryzopsis pungens (Torrey ex Sprengel) Hitchcock - . 2n = 22, 24.


Dry, sandy or rocky woods.



PANICUM

Panicum acuminatum Swartz var. acuminatum - . 2n = 18.


Dry sand or beaches. [P. auburne Ashe; P. lanuginosum Elliott]

Panicum acuminatum Swartz var. fasciculatum (Torrey) A. A. Beetle - . 2n = 18.


Thin, dry woodlands, dry or moist sterile soil in the open. [P. huachucae Ashe var. fasciculatum (Torrey) F. T. Hubbard; P. implicatum Scribner; P. lanuginosum Elliott var. fasciculatum (Torrey) Fernald; P. lanuginosum var. implicatum (Scribner) Fernald; P. lanuginosum var. tennesseense (Ashe) Gleason; P. subvillosum Ashe; P. tennesseense Ashe]

Panicum acuminatum Swartz var. lindheimeri (Nash) A. A. Beetle - . 2n = 18.


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

Panicum amarum Elliott var. amarum - . 2n = 54.


Sandy coasts.

Panicum amarum var. amarulum (Hitchcock & Chase) P. Palmer - . 2n = 36.


Sea beaches. [P. amarulum Hitchcock & Chase]

Panicum boreale Nash - . 2n = 18.


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

Panicum boscii Poiret - . 2n = 18, 36.


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

Panicum capillare Linnaeus - Witchgrass. 2n = 18.


Open sandy or stony soil, roadsides, waste places, cultivated land. [P. capillare var. agreste Gattinger; P. capillare var. occidentale Rydberg]

Panicum clandestinum Linnaeus - . 2n = 36.


Thickets, shores, alluvial woods borders.

Panicum columbianum Scribner - . 2n = 18.


Sandy open ground, thin woods. [P. columbianum var. oricola (Hitchcock & Chase) Fernald; P. columbianum var. thinium Hitchcock & Chase; P. tsugetorum Nash]

Panicum commutatum Schultes var. commutatum - 2n = 18.

Open woods, open sandy or rocky places. [P. divergens Kunth] This taxon is not mapped since we did not distinguish between the varieties of P. commutatum when we recorded specimen data.

Panicum commutatum Schultes var. ashei (G. Pearson ex Ashe) Fernald - . 2n = 18.


Dry, open woods, openings. [P. ashei G. Pearson ex Ashe]

Panicum depauperatum Muhlenberg - . 2n = 18.


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

Panicum dichotomiflorum Michaux var. dichotomiflorum - Fall Panicum. 2n = 36, 54.


Moist soil, shores, roadsides, railroads, waste areas. [P. dichotomiflorum var. geniculatum (Wood) Fernald]

Panicum dichotomiflorum Michaux var. puritanorum Svenson - .


Damp sands, pond margins.

Panicum dichotomum Linnaeus var. dichotomum - . 2n = 18.


Dry, open woods. [P. dichotomum var. barbulatum (Michaux) Wood; P. barbulatum Michaux]

Panicum dichotomum Linnaeus var. lucidum (Ashe) Lelong - . 2n = 18.


Rocky woods. [P. lucidum Ashe]

Panicum dichotomum Linnaeus var. mattamuskeetense (Ashe) Lelong - . 2n = 18.


[P. annulum Ashe; P. annulum Ashe var. glabrescens Gleason; P. clutei Nash; P. mattamuskeetense Ashe; P. mattamuskeetense Ashe var. clutei (Nash) Fernald]

Panicum flexile (Gattinger) Scribner - . 2n = 18.


Shores in calcareous areas.

Panicum gattingeri Nash - . 2n = 18.


Sandy areas, roadsides, fields, wood borders. [P. capillare Linnaeus var. campestre Gattinger]

Panicum latifolium Linnaeus - . 2n = 18.


Open, usually dry, woods.

Panicum linearifolium Scribner - . 2n = 18.


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

Panicum meridionale Ashe - . 2n = 18.


Dry, open habitats. [P. meridionale var. albemarlense (Ashe) Fernald; P. albemarlense Ashe]

Panicum microcarpon Muhlenberg ex Elliott - . 2n = 18.


Woodlands, openings. [P. nitidum Lamarck var. ramulosum Torrey]

PANICUM MILIACEUM Linnaeus - Broom-corn Millet. 2n = 36, 54, 72.


Roadsides, waste places. From the Old World.

Panicum oligosanthes Schultes var. oligosanthes - . 2n = 18.


Dry, open soil.

Panicum oligosanthes Schultes var. scribnerianum (Nash) Fernald - . 2n = 18.


Dry, open soil. [P. scribnerianum Nash]

Panicum ovale Elliott var. pseudopubescens (Nash) Lelong - . 2n = 18.


Dry, sandy woods. [P. addisonii Nash; P. commonsianum Ashe var. commonsianum; P. commonsianum var. addisonii (Nash) Fernald; P. pseudopubescens Nash; P. villosissimum Nash var. pseudopubescens (Nash) Fernald]

Panicum philadelphicum Bernhardi ex Trinius - . 2n = 18.


Shores, woods, roadsides. [P. tuckermanii Fernald]

Panicum polyanthes Schultes - . 2n = 18.


Dry woods. [The identity of all New England voucher specimens is open to question.]

Panicum rigidulum Bosc ex Nees var. rigidulum - . 2n = 18.


Shores, meadows. [P. rigidulum var. condensum (Nash) F. Seymour; P. agrostoides Sprengel var. agrostoides; P. agrostoides var. condensum (Nash) Fernald; P. condensum Nash]

Panicum rigidulum Bosc ex Nees var. elongatum (Pursh) Lelong - . 2n = 18.


Swamps, shores, meadows. [P. stipitatum Nash]

Panicum rigidulum Bosc ex Nees var. pubescens (Vasey) Lelong - . 2n = 18.


Shores, meadows, bogs. [P. longifolium Torrey]

Panicum scabriusculum Elliott - . 2n = 18.


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

Panicum scoparium Lamarck - Velvet Panic-grass. 2n = 18.


Damp soil.

Panicum sphaerocarpon Elliott - . 2n = 18.


Dry fields and woods, beaches.

Panicum spretum Schultes - . 2n = 18.


Shores, meadows.

Panicum verrucosum Muhlenberg - . 2n = 36.


Moist soil, shores.

Panicum villosissimum Nash - . 2n = 18.


Open woods.

Panicum virgatum Linnaeus - Switchgrass. 2n = 18-154.


Dry soil, sandy or gravelly shores, fields. [P. virgatum var. cubense Grisebach; P. virgatum var. spissum Linder]

Panicum wrightianum Scribner - . 2n = 18.


Pond shores.

Panicum xanthophysum A. Gray - . 2n = 36.


Sandy, open woods and clearings.



PANICUM hybrids

Panicum acuminatum Swartz X P. dichotomum Linnaeus - .


Panicum dichotomum Linnaeus X P. latifolium Linnaeus - .


Panicum X scoparioides (Ashe) Mohlenbrock - . 2n = 18.


Open woods. [P. acuminatum Swartz X P. oligosanthes Schultes; P. villosissimum Nash var. scoparioides (Ashe) Fernald]



PAPPOPHORUM

PAPPOPHORUM VAGINATUM Buckley - . 2n = 60.


Wool waste. From farther south and west. [P. MUCRONULATUM - misapplied]



PASCOPYRUM

PASCOPYRUM SMITHII (Rydberg) Á. Löve - Western Wheatgrass . 2n = 56.


Railroads. From farther west. [AGROPYRON SMITHII Rydberg; ELYTRIGIA SMITHII (Rydberg) Nevski]



PASPALUM

Paspalum laeve Michaux - . 2n = 40, 80, 58.


Meadows, shores, damp, sandy fields. [P. laeve var. circulare (Nash) W. Stone ex Fernald; P. laeve var. pilosum Scribner; P. circulare Nash; P. longipilum Nash]

Paspalum setaceum Michaux var. setaceum - . 2n = 20, 40, 50.


Sandy fields.

Paspalum setaceum Michaux var. muhlenbergii (Nash) D. J. Banks - . 2n = 20, 40, 50.


Dry fields, pastures. [P. ciliatifolium Michaux var. muhlenbergii (Nash) Fernald; P. pubescens Muhlenberg]

Paspalum setaceum Michaux var. psammophilum (Nash) D. J. Banks - . 2n = 20, 40, 50.


Dry, sandy fields near the coast. [P. psammophilum Nash]



PHALARIS

Phalaris arundinacea Linnaeus - Reed Canary-grass. 2n = 14, 28, 35, 42, 48.


Shores, wet meadows.

PHALARIS CANARIENSIS Linnaeus - Canary-grass. 2n = 12.


Roadsides, railroads, waste places. From Europe.



PHLEUM

Phleum alpinum Linnaeus - Mountain Timothy. 2n = 14, 28.


High altitudes.

PHLEUM ARENARIUM Linnaeus - . 2n = 14.


Waste areas, ballast. From Europe and North Africa.

PHLEUM PRATENSE Linnaeus - Timothy. 2n = 14, 21, 28-84.


Fields, roadsides. From Eurasia. [P. PRATENSE var. NODOSUM (Linnaeus) Hudson]

PHLEUM SUBULATUM (Savi) Ascherson & Graebner - . 2n = 14.


Waste areas, ballast. From the Mediterranean.



PHRAGMITES


PHRAGMITES AUSTRALIS (Cavanilles) Trinius ex Steudel spp. AUSTRALIS - Common Reed. 2n = 36, 40, 42-59, 72, 84, 96.


Marshes, shores, ditches. From Eurasia. [P. communis Trinius var. communis in part; P. communis var. berlandieri (Fournier) Fernald in part]


Phragmites australis (Cavanilles) Trinius ex Steudel spp. americanus Saltonstall, P.M. Peterson, & Soreng - Common Reed. 2n = 36, 40, 42-59, 72, 84, 96.


Marshes, shores, ditches. [P. communis Trinius var. communis in part; P. communis var. berlandieri (Fournier) Fernald in part]



PHYLLOSTACHYS


PHYLLOSTACHYS DULCIS McClure - Sweetshoot Bamboo.


Barnyards. From China.



PIPTATHERUM


Piptatherum racemosum (Smith) Eaton - Black Mountain-rice. 2n = 46, 48.


Dry, often calcareous, rocky woods. [Oryzopsis racemosa (Smith) Ricker]



PIPTOCHAETIUM


Piptochaetium avenaceum (Linnaeus) Parodi - Black Oat-grass. 2n = 22, 28.


Dry openings, open woods. [Stipa avenacea Linnaeus]



POA


Poa alsodes A. Gray - .


Alluvial woods.

POA ANNUA Linnaeus - Annual Bluegrass. 2n = 14, 24-26, 28, 52.


Roadsides, cultivated fields, waste places. From Eurasia.

POA BULBOSA Linnaeus - Bulbous Bluegrass. 2n = 14, 21, 24, 28, 31-58.


Lawns, dry fields. From Eurasia.

POA CHAPMANIANA Scribner - .


Cultivated fields, weedy places. From farther south and west.

POA COMPRESSA Linnaeus - Canada Bluegrass. 2n = 14-56.


Dry soil, roadsides, waste places. From Eurasia.

Poa glauca Vahl - . 2n = 42-78.


Alpine meadows and ravines.

Poa laxa Haenke subsp. fernaldiana (Nannfeldt) N. Hylander - . 2n = 42.


Alpine meadows. [P. fernaldiana Nannfeldt]

POA NEMORALIS Linnaeus subsp. NEMORALIS - Wood Bluegrass. 2n = 14, 28-70.


Dry woods, roadsides. From Europe.

Poa palustris Linnaeus - Fowl Meadow-grass. 2n = 28, 30, 32, 42.


Moist woods, shores, swamps, meadows.

POA PRATENSIS Linnaeus subsp. PRATENSIS - Kentucky Bluegrass. 2n = 14, 21, 25-124.


Roadsides, fields, meadows. From Europe.

Poa pratensis Linnaeus subsp. alpigena (Fries ex Blytt) Hiitonen - . 2n = 28-127.


Alpine regions. [P. alpigena (Fries ex Blytt) Lindman f.; P. arctica - misapplied]

POA PRATENSIS Linnaeus subsp. ANGUSTIFOLIA (Linnaeus) Arcangeli 2n = 46-72.

Dry soil in the open. From Europe. [P. ANGUSTIFOLIA Linnaeus] This taxon is not mapped since we did not distinguish between the subspecies PRATENSIS and ANGUSTIFOLIA of P. PRATENSIS when we recorded specimen data.

Poa saltuensis Fernald & Wiegand - . 2n = 28.


Rich, usually dry woods. [P. saltuensis var. microlepis Fernald; P. languida Hitchcock]

POA TRIVIALIS Linnaeus - Rough Bluegrass. 2n = 14, 28, 72.


Springheads, brook sides, glades. From Eurasia.



POLYPOGON

POLYPOGON MONSPELIENSIS (Linnaeus) Desfontaines - Rabbitfoot Grass. 2n = 14, 26, 28, 35, 42.


Wool waste, waste places. From Europe.



PUCCINELLIA

PUCCINELLIA DISTANS (Linnaeus) Parlatore subsp. DISTANS - . 2n = 14, 28, 42.


Roadsides, waste places. From Europe.

PUCCINELLIA DISTANS (Linnaeus) Parlatore subsp. BOREALIS (Holmberg) W. E. Hughes - . 2n = 42.


Roadsides, waste places. From Europe. [P. DISTANS var. ANGUSTIFOLIA (Blytt) Holmberg]

Puccinellia fasciculata (Torrey) Bicknell - . 2n = 14, 28, 42.


Salt marshes, brackish shores, sandy seashores.

Puccinellia laurentiana Fernald & Weatherby - . 2n = 56.

Gravelly seashores. [The voucher for this in New England from Mt. Desert Isl., ME at MASS has been determined to be Puccinellia pumila (Arthur Haines, pers. comm.) which in our treatment is included under Puccinellia tenella subsp. alaskana. In the Flora of North America treatment of Poaceae published in 2007 (vol. 24) after publication of our atlas installment for Poaceae Puccinellia laurentiana would be included under Puccinellia nutkaensis (J. Presl) Fernald & Weatherby. The taxon that we have treated as PUCCINELLIA DISTANS subsp. BOREALIS has also been included under Puccinellia nutkaensis.]

Puccinellia maritima (Hudson) Parlatore - . 2n = 14-77.


Salt marshes, brackish shores.

PUCCINELLIA NUTTALLIANA (Schultes) Hitchcock - . 2n = 28, 42, 56.


Moist, alkaline soil. From farther west. [P. AIROIDES (Nuttall) S. Watson & Coulter]

Puccinellia tenella (Lange) Holmberg subsp. alaskana (Scribner & Merrill) Tzvelev - . 2n = 42, 56.


Salt marshes, gravelly beaches. [P. paupercula (Holmberg) Fernald & Weatherby var. alaskana (Scribner & Merrill) Fernald & Weatherby; P. pumila (Vasey) Hitchcock]




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http://neatlas.org/Neatlas1/Poac-M-R.html -- Revised: March 3, 2011

Created by: Ray Angelo

rangelo@oeb.harvard.edu