168 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Florida: Baldwin, Hitchcock 989; Lake City, Combs 183; Madison, Combs 216; 



Monticello, Combs 301, 329; Tallahassee, Combs 372, 380; Quincy, Combs 408; 



Washington County, Combs 554, 567a; Leon County, Curtiss E; Chatta- 

 hoochee, Tracy 3639; Mari- 



anna, Tracy 3637 ; Milton, Chase 



4302; Eustis, Nash 1243; Pasco 



County, Curtiss 6639. 

 Alabama: Tuskegee, Carver 96; 



Gateswood, Tracy 8420; Mo- 

 bile, Kearney 21 in part. 

 Mississippi: Starkville, Chase 



4444 ; vicinity of Biloxi, Chase 



4359, Hitchcock 1082, Kearney 



284i, 306 in part, Traq/ 1417, 



3634. 

 Louisiana: Covington, Langlois 



48b in 1884; Calcasieu, Cocks 2194; Lake Charles, Hitchcock 1127, 1139|, 1140, 



Traq/ 3650. 

 Texas: Waller County, Hitchcock 1225, Thurow 1 in 1900. 

 Oklahoma: Sapulpa, Bush 1388 in 1895 (Mo. Bot. Gard. Herb.). 



Fig. 157.— Distribution" of P. aciculare. 



92. Panicum chrysopsidifolium Nash. 



Panicum chrysopsidifolium Nash in Small, Fl. Southeast. U. S. 100. 1903. On page 

 1327, in the list of new genera and species, the following citation is given: "Type, Cur- 

 tiss, N. Am. PL, no. D, in Herb. N Y. B. G." The type, in the herbarium of the New 

 York Botanical Garden, is labeled "Hammock land, Leon Co. Fla., May 12, 1886," 

 and consists of a clump of four vernal culms 30 to 55 cm. high with mature, short- 

 exserted panicles. 



DESCRIPTION. 



Vernal form with ascending or spreading, rather slender culms, 30 to 45 cm. high, 

 purplish, grayish- villous, especially below, the nodes bearded; sheaths much shorter 

 than the internodes, villous like the culm, densely so at the summit; blades 5 to 10 

 cm. long, 3 to 5 mm. wide, tapering from base to apex, conspicuously pointed, villous 

 on both surfaces; panicles finally long-exserted, 4 to 6 cm. long, about three-fourths 



as wide, the flexuous branches ascending or spread- 

 ing; spikelets 2 mm. long, 1.2 to 1.3 mm. wide, ob~ 

 ovate, blunt and turgid ; first glume one-third the 

 length of the spikelet, subacute or obtuse; second 

 glume and sterile lemma subequal, scarcely cover- 

 ing the fruit at maturity, villous, the bullate pa- 

 pillae prominent; fruit 1.7 mm. long, 1.2 mm. wide, 

 broadly elliptic, minutely puberulent at the apex. 

 Autumnal form spreading and forming mats, the 

 culms slender, often zigzag toward the tip; blades 

 numerous, flat, becoming papery with age, mostly 

 1 to 3 cm. long, 1.5 mm. wide; spikelets more turgid than usual in the primary panicle. 

 Panicum chrysopsidifolium has been confused with P. neuranthum Griseb., because 

 both species were distributed by Wright under the same number (Wright 3453). 

 This number in the Grisebach Herbarium is the type of P. neuranthum. The same 

 number in several other herbaria consists of the autumnal form of P. chrysopsidifolium. a 



a For further discussion of Wright's Cuba grasses, see Hitchcock, Contr. Nat. Herb. 

 12: 183. 1909. 



Fig. 158.— P. chrysopsidifolium. 

 type specimen. 



From 



