HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 107 
spikelets 3 to 3.5 mm. long, 0.7 to 0.8 mm. wide, acuminate; first glume two-thirds to 
three-fourths the length of the spikelet; second glume and sterile lemma subequal, 
usually scabrous on the midnerve, 
much exceeding the fruit; fruit 1.8 to 2 
mm. long, 0.6 to 0.8 mm. wide. 
This species is closely related to P. 
longifolium from which it may be dis- 
tinguished by its shorter blades, longer 
spikelets, and usually by the lack of 
pubescence. 
DISTRIBUTION. 
Margins of ponds and wet woods, Geor- 
gia to Florida, and west to Louisiana. 
Fig. 101.—Distribution of P. combsii. 
Gzorera: Tifton, Hakper 1679; Douglas, Harper 2014, Huntington, Harper 1081. 
Froripa: Pensacola, Curtiss 6919; Argyle, Curtiss 6925A; Chipley, Combs 583; 
without locality, Chapman. 
ALABAMA: Gateswood, Tracy 8408.. 
MisstssiPrt: Biloxi, Tracy 4568 in part. 
Loutstana: Lake Charles, Chase 4434. 
55. Panicum anceps Michx. 
Panicum anceps Michx. Fl. Bor. Amer. 1: 48. 1803. ‘‘Has. in Carolinae herbosis 
humidis sylvaticis.” The type specimen, labeled ‘‘Panicum anceps, Hab. in her- 
bosis humidis Carolinae, Virginiae, Georgiae,”’ is in the Michaux Herbarium. 
Panicum rostratum Muhl.; Willd. Enum. Pl. 1032. 1809. ‘‘ Habitat in sylvaticis 
” 
humidis Pensylvaniae, Carolinae. 
The type specimen, in the Willdenow Herbarium, 
is marked ‘‘P. rostratum Am. Boreal. Muhlenberg.” Muh- 
lenberg later @ published P. rostratum as anew species. The 
specimen in the Muhlenberg Herbarium is the same species 
as the one sent to Willdenow. 
Agrostis nutans Poir. in Lam. Encycl. Suppl. 1: 255. | 
1810. ‘‘Cette plante a été recueillie dans la Caroline, par 
M. Bosc.” We have not seen this specimen, but the de- 
scription applies well to P. anceps, to which species Poiret 
later > refers his A. nutans. 
Panicum nutans Desv. Opusc. 93. 1831. Based on “‘ Agrostis 
nutans Poir. Enc. suppl.” 
Fig. 102.—P. anceps. From Panicum anceps angusta[um] Vasey, U.S. Dept. Agr. Div. 
type specimen. Bot. Bull. 8: 
Si e8on ie chexas (GalC.Nealley) a aulhe 
type specimen, in the National Herbarium, is a tall plant with an immature panicle, 
the long blades involute. 
Panicum anceps densiflorum Vasey, U. S. Dept: Agr. Div. Bot. Bull. 8: 37. 1889. 
“Texas (J. F. Riggs).”” The type specimen, in the National Herbarium, was collected 
November, 1884, Marshall, Texas, by J. 
F. Riggs, no. 91. It consists of the upper por- 
tions of two robust plants, the panicle branches densely flowered. 
DESCRIPTION. 
Plants in tufts of few to many culms, 
50 cm. to 1 meter or more high, with numerous 
stout, scaly rootstocks; culms usually robust, not strongly: compressed, glabrous; 
sheaths usually shorter than the internodes, glabrous to densely papillose-pilose, 
@ Descr. Gram. 121.1817. ~- 
6 In Lam. Encycl. Suppl. 5: 539. 1817. 
