HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 



169 



The specimen referred to by Grisebach,^ under P. neuranthum as, "forma ascendens, 

 ramosa, foliis planis, spiculis ut in <?" is P. chrysopsidifolium. 



This species can fee distinguished from P. consanguineum by the smaller spikelets, 

 and from P. aciculare by the bearded 

 nodes and by the lax culms and flat 

 blades of the autumnal form. 



DISTRIBUTION. 



Sandy pine woods of the Coastal 

 Plain, Florida to Louisiana; also in 

 Cuba and Porto Rico. 



Florida: Leon County, Curtiss D; 

 Orange County, Baker 45; San- 

 ford, Hitchcock 775. 

 Louisiana: Lake Charles, Chase 



4405. 

 Cuba: Consolacion del Sur, Palmer & Riley 481; Herradura, Hitchcock 116; 



eastern Cuba, Wright 3453 in part; Isle of Pines, Palmer & Riley 982. 

 Porto Rico: Santurce, Heller 982; Las Marias ad Tabomeo, Sintenis 5985. 



Fig. 159.— Distribution of P. chrysopsidifolium. 



93. Panicum consanguineum Kunth. 



Panicum villosum Ell. Bot. S. C. & Ga. 1: 124. 1816, not Lam. 1791. No locality 

 is cited. The type, in the Elliott Herbarium, consists of a single culm lacking the 

 base, bearing four leaves and an immature, scarcely exserted panicle. The accom- 

 panying label reads: "Panicum villosum mihi. Hab. in umbrosis. Flor. Ap. Ma." 



Panicum consanguineum Kunth, Rev. Gram. 1: 36. 1829. Based on P. villosum 

 Ell., the name presumably changed because of P. villosum Lam. 



Panicum commutatum consanguineum Beal, Grasses N. Amer. 2: 141. 1896. Based 

 on P. consanguineum Kunth. 



Panicum georgianum Ashe, Journ. Elisha Mitchell Soc. 15: 36. 1898. "Georgia: 

 Small; Darden [Darien] Junction, Mcintosh Co., June 27, 1895." The type speci- 

 men, which is in the Biltmore Herbarium and which is marked "P. georgianum 

 W. W. Ashe," in Ashe's writing, is the autumnal form. 



Panicum cahoonianum Ashe, Journ. 

 Elisha Mitchell Soc. 15 :& 113. 1899. Based 

 on P. georgianum Ashe, the name changed 

 because of Panicum georgicum Spreng. 

 1825. 



DESCRIPTION. 



Vernal form with culms ascending or 

 spreading, often geniculate at base, 20 to 

 55 cm. high, rather stout, densely felty- 

 villous below, less so above, nodes 

 bearded; sheaths villous, the upper often 

 sparsely so; blades erect or ascending, 7 

 to 11 cm. long, 5 to 8 mm. wide, (the 

 lowermost shorter and broader), tapering slightly toward the base, more or less invo- 

 lute-pointed, villous on both surfaces or nearly glabrous above, the longitudinal 



a Cat. PI. Cub. 232. 1866. 



b The title page, vol. 15, pt. 2. (pp. 76-114) is incorrectly numbered 14. (XIV). 



Fig. 160.— P. consanguineum. From type specimen 

 of P. villosum Ell. 



