HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 245 
Autumnal form spreading, branching from the middle and upper nodes, the 
branches rather crowded, the reduced 
involute-pointed blades exceeding the 
ultimate panicles; blades of the winter 
rosette as much as7 cm. (rarely 12 
cm.) long. 
DISTRIBUTION. 
Sandy woods, North Carolina and 
Alabama; rare. 
NortH Carona: Wilmington, 
Ashe in 1899, Hitchcock 316; 
Jacksonville, Chase 3195. 
AtaBaMA: Auburn, Alabama Bio- 
logical Survey, Earle & Baker 1530 in part, Hitchcock 1325; Gateswood, 
Tracy 8429. 
Fic. 264.—Distribution of P. wilmingtonense. 
146. Panicum tsugetorum Nash. 
Panicum tsugetorum Nash, Bull. Torrey Club 25: 86. 1898. “‘Type material 
collected by the writer in the Hemlock Grove, New York Botanical Garden, on dry 
soil, June 22, 1896, no. 287.’’ The type, in Nash’s herbarium, consists of a clump of 
8 vernal culms 20 to 37 cm. high, decumbent at base and bearing scarcely mature pan- 
icles. The culms are less stiff and the blades thinner than usual in this species, as 
the plants grew in the shade. 
Panicum lanuginosum siccanum Witche. & Chase, Rhodora 8: 207. 1906. ‘Type 
Chase 1602. Dry, hot sand of sandstone cliff. Starved Rock, Ill.”’ This specimen, 
in the National Herbarium, is the early autumnal form, and represents an extremely 
hairy form of P. tsugetorum. The culms and sheaths are ascending-pilose and the 
blades are sparsely long-pilose on the upper surface. 
DESCRIPTION. 
Vernal plants usually pale bluish green; culms 30 to 50 cm. high, spreading or 
ascending, the lower nodes often geniculate, densely appressed-pubescent with short, 
crisp hairs, long hairs more or less copiously intermixed with these on the lower inter- 
nodes or sometimes nearly to the summit; sheaths commonly not much shorter than 
the internodes, pubescent like the culm but less densely so, ascending-ciliate on the 
margin; ligules | to 1.5 mm. long; blades thickish, 
firm, with a thin white cartilaginous margin, ascend- 
ing, 4 to 7 cm. long, 4 to 7 mm. wide, rounded at the 
base, acuminate, glabrous or with a few long hairs 
near the base on the upper surface, appressed- 
puberulent beneath; panicles 3 to 7 cm. long, nearly 
as wide, the axis and spreading, flexuous branches 
appressed crisp puberulent; spikelets 1.8 to 1.9mm. 
Pia. ane - tsugetorum. From Jong 1 mm. wide, obovate-obtuse, rather turgid, 
ype sprees short-pubescent; first glume one-third to two-fifths 
as long as the spikelet, acute; second glume and sterile lemma barely equaling the 
fruit at maturity; fruit 1.5 mm. long, 1 mm. wide, broadly elliptic, obtuse. 
Autumnal form decumbent-spreading, branching from the lower and middle nodes 
often before the maturity of the primary panicles, the branches ascending, the ulti- 
mate branchlets appressed, the blades not greatly reduced nor crowded; winter 
rosette appearing rather early, the blades often conspicuously long-pilose. 
