HITCHCOCK AND CHASE—NORTH AMERICAN PANICUM. 173 
the narrower lower blades; in the autumnal state by the involute blades and dis- 
tinctly longer spikelets. In the autumnal state this species resembles P. arenicoloides, 
but has larger spikelets. 
DISTRIBUTION. 
Sandy pine woods, southern Georgia to Florida and Mississippi; also in Cuba. 
Georata: Albany, Tracy 3614, 3635 in part. 
Fiorina: Lake City, Combs 136; De Funiak Springs, Combs 456; Monticello, 
Combs 298; Madison, Combs 231; Pensacola, Combs 516; Gainesville, Chase 
4248, Combs 731; Sanford, 
Hitchcock 786, 791; Titusville, 
Chase 3991, 4021; Eustis, Nash 
1226, 1856; Orange Bend, Chase 
4105; Lake Harris, Chase 4119; 
Orange County, Combs 1037; 
Ormond, //ttchcock 114; Lafay- 
ette County, Combs 853, 899; 
Lakeland, Hitchcock 834, 837, 
850; Wiwauma, [Hitchcock 980; 
Tampa, Combs 1340, 1343; 
Seminole, Tracy 7163; Bartow, Fig. 165.—Distribution of P. fusiforme. 
Combs 1241; Braidentown, 
Hitchcock 964; Manatee County, Tracy 6708, 6710 in part, 6713 in part, 6713a; 
Perico Island, Tracy 7371; Myers, Chase 4179, 4194, Hitchcock 877, 899, 912, 
923; Miami, Chase 3855, Hitchcock 627. 
AvaBAMA: Flomaton, Hitchcock 1054. 
Mississippi: Ocean Springs, Tracy in 1892. 
Cusa: Herradura, Caldwell & Baker 7139, Hitchcock 117, Tracy 9074; western 
Cuba, Wright 3453 in part, 3454 in part; Isle of Pines, Curtiss 406. 
96. Panicum arenicoloides Ashe. 
Panicum arenicoloides Ashe, Journ. Elisha Mitchell Soc. 16:89. 1900. “Shady 
sandy woods along the coast of North Carolina. Type material collected by me near 
Wilmington, N. C., June 6, 1899.” The type, in Ashe’s herbarium, consists of three 
vernal culms with involute blades and mature panicles; the spikelets are 2.4 mm, 
long. 
Panicum orthophyllum Ashe, Journ, Elisha Mitchell Soc. 16:90. 1900. ‘Shady 
slopes of sand hills, New Hanover County, N.C., June, 1899.’ The type, in Ashe’s 
herbarium, consists of a small tuft of vernal culms 
beginning to branch, about 60 cm. high, the lower 
nodes geniculate. The primary panicles are mostly 
devoid of spikelets, the secondary nearly mature; 
the spikelets are 2.2 mm. long. 
DESCRIPTION. 
Vernal form intermediate in appearance between 
F 1a. 166.—P. arenicoloides. From that of P. angustifolium and P. acieulare, grayish 
type specimen. green, slender, mostly 30 to 50 cm. high; lower 
sheathsand blades softly villous; blades 7 to 12cm. 
long (the lower shorter), 3 to 4, rarely 5 mm. wide, tapering from the base to a more 
or less involute apex; panicles 4 to 6 cm. long, two-thirds to three-fourths as wide, 
the lower branches ascending; spikelets 2.1 to 2.5 mm. long, 1.2 to 1.3 mm. wide, 
obovate, obtuse; first glume one-third the length of the spikelet, truncate or pointed; 
second glume and sterile lemma scarcely covering the fruit at maturity, papillose- 
