168 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 



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



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



Monticello, Combs 301, 329; Tallahassee, Combs 372, 3S0; Quincy, Combs iOS; 



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

 hoochee, Tracy 3639; Mari- 



anna, Tracy 3637 ; Milton, Chase 



4302; Eustis, iVas/i 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, Hitchcoch 1082, Kearney 



284i, 306 in part, Tracy 1417, 

 • 3634. 

 Louisiana: Covington, Langlois 



48b in 1884; Calcasieu, CocAs 2194; Lake Charles, Hitchcock 1127, 1139J, 1140, 



Tracy 3650. 

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

 Oklahoma: Sapulpa, Sms/j 1388 in 1895 (Mo. Bot. Gard. Herb.). 



V '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^ 



Fig. 158. — P. chrysopsidifolium. From 

 type specimen. 



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

 12: 183. 1909. 



