HITCHCOCK AND CHASE NORTH AMEEICAN PANICUM. 



173 



Fig. 165. — Distribution of P.fusiforme. 



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. 

 Georgia: Albany, Tracy 3614, 3635 in part. 

 Florida: 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, 



C/iase 3991, 4021; Eustis, Nash 



1226, 1856; Orange Bend, Chase 



4105; Lake Harris, C^ase 4119; 



Orange County, Combs 1037; 



Ovraond, Hitchcock 114; Lafay- 

 ette County, Combs 853, 899; 



Lakeland, Hitchcock 834, 837, 



850; Wiwauma, Hitchcock 980; 



Tampa, Combs 1340, 1343; 



Seminole, Tracy 7163; Bartow, 



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. 

 Alabama: Flomaton, Hitchcock 1054. 

 Mississippi: Ocean Springs, Trac?/ in 1892. \ 

 Cuba: Herradura, Caldivell & 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 See. 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 

 that of P. angustifolium and P. aciculare, grayish 

 green, slender, mostly 30 to 50 cm. high; lower 

 sheaths and blades softly villous; blades 7 to 12 cm. 

 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; 

 BBCond glume and sterile lemma scarcely covering the fruit at maturity, papillose- 



FiG. 166. — P. arenicoloides. From 

 type specimen. 



