Part 7 - UNC Herbarium

POACEAE 902
ex Nees ssp. rigidulum – FNA; < P. rigidulum var. rigidulum – K, Z; < P. rigidulum – C, GW; > P. agrostoides var. agrostoides
– F, HC; > P. agrostoides var. ramosius (C. Mohr) Fernald – F, HC; = P. agrostoides – S; not Panicum]
Panicum tenerum Beyrich ex Trinius, Southeastern Panic Grass. Cp (GA, NC, SC): limesink ponds, depression meadows,
cypress savannas, wet pinelands, bogs; rare (GA Special Concern, NC Rare). June-September. Coastal Plain from se. NC to FL,
west to e. TX; West Indies. The rhizomes produce lines of closely spaced culms. Though 0.5-1 m tall, the culms are narrow and
inconspicuous. [= RAB, FNA, GW, HC, K, S, Z; not Panicum]
Panicum verrucosum Muhlenberg, Warty Panic Grass. Cp, Pd, Mt (GA, NC, SC, VA): wet pinelands, marshes, shores,
ditches; common (occasional in Piedmont, rare in Mountains). August-October. MA and PA west to MI and IN, south to FL and
se. TX. Spikelets deep green, the warty surface unique among Panicum in our region. [= RAB, C, F, FNA, G, GW, HC, K, S,
W, Z; not Panicum]
Panicum virgatum Linnaeus var. cubense Grisebach, Blunt Panic Grass. Cp (GA, NC, SC, VA?): wet to dry sandy
pinelands; occasional (frequent in the Sandhills). June-October. Coastal Plain from MA to FL, west to MS; also in MI; West
Indies. [= F, HC, S; < P. virgatum – RAB, C, FNA, G, GW, W, Z; < P. virgatum var. virgatum – K]
Panicum virgatum Linnaeus var. virgatum, Switchgrass. Cp, Pd, Mt (GA, NC, SC, VA): dry or wet sandy soils of
pinelands, fresh and brackish marshes, shores; common (occasional in Mountains). June-October. Sw. Québec and ND south to
FL and TX, west to NV; Bermuda; Central and South America. [= F, HC, S; < P. virgatum – RAB, C, FNA, G, GW, W, Z; < P.
virgatum var. virgatum – K; not Panicum]
* Panicum antidotale Retzius. Cp (SC): Native of India. Reported for NC and SC (FNA, Kartesz 1999). {investigate} [=
FNA, HC, K; not Panicum] {not keyed at this time}
* Panicum bergii Arechav. Cp (GA): disturbed areas; rare, native of South America. Reported for sc. GA (HC) and AL
(Kartesz 1999). {investigate} [= FNA, HC, K; Panicum s.s.] {not keyed at this time}
* Panicum bisulcatum Thunberg. Cp (GA, SC): disturbed areas; rare, native of Asia. Reported introduction in SC, GA, and
PA (Kartesz 1999), and as a ballast plant for se. PA (Philadelphia) (Rhoads & Klein 1993, as P. acroanthum Steudel). [= FNA,
K; ? P. acroanthum Thunberg] {not keyed at this time}
Panicum brachyanthum Steudel. Cp (GA): {habitat unknown}; rare. Sw. GA west to c. TX. [= FNA, HC, K]
Panicum dichotomiflorum Michaux var. puritanorum Svenson, Puritan Panic Grass. Alleged to be in VA northward
(FNA). [= F, G, HC, K; < P. dichotomiflorum – C; = P. dichotomiflorum Michaux ssp. puritanorum (Svenson) Freckmann &
Lelong – FNA]
* Panicum miliaceum Linnaeus ssp. ruderale (Kitag.) Tzvelev, Panic Millet. [= FNA, K; = P. miliaceum ssp. spontaneum
(Kit.) Tzvelev – C; < P. miliaceum – F, G, HC] {not keyed at this time}
Panicum virgatum Linnaeus var. spissum Linder ranges south to PA, MD, and DE (Kartesz 1999). [= F, HC, K; < P.
virgatum – C, FNA, G; not Panicum] {not keyed at this time}
References: Tucker (1996)=Z.
Parapholis C.E. Hubbard (Sickle Grass)
* Parapholis incurva (Linnaeus) C.E. Hubbard, Sickle Grass, Hard Grass, Thin-tail. Cp (NC, VA): sandy and muddy flats,
brackish or salt marshes; rare, introduced from Europe. [= RAB, C, HC, K, Z; = Pholiurus incurvus (Linnaeus) Schinzius &
Thellung – F, G; ? Lepturus filiformis (Roth) Trinius]
Pascopyrum A. Löve (Wheatgrass)
* Pascopyrum smithii (Rydberg) A. Löve, Western Wheatgrass. Mt (GA): disturbed areas; rare. Reported for ne. GA
(Rabun County) by Jones & Coile (1988), as Agropyron smithii Rydberg. It is also reported for TN and KY (Kartesz 1999). [=
K; = Elytrigia smithii (Rydberg) Nevski – C; = Agropyrum smithii Rydberg – F, G, W]
Paspalidium
(see Setaria)
Paspalum Linnaeus 1759 (Paspalum, Crown Grass, Beadgrass)
(by Alan S. Weakley & Richard J. LeBlond)
A genus of 300-400 species, of tropical and warm temperate regions. References: Allen & Hall in FNA (2003a); Banks
(1966)=Z; Silveus (1942)=Y. Key based closely on FNA and on Banks (1966).
1 Spikelets solitary, not associated with a rudimentary spikelets or naked pedicels.
2 Panicles with 1-70 branches, if > 1, the branches arranged racemosely.