212 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Michigan: Port Huron, Dodge in 1909; Twin Lakes, Wheeler 24, 28; Magician 

 Lake, TJmbach 2155. 



Wisconsin: Lacrosse, in 1899, name of collector not given (Univ. Vt. Herb.). 



Delaware: Deakynes Landing, Commons 286. 



Maryland: Between Chesapeake Beach and Chesapeake Junction, Hitchcock 

 1629, 1636; Lanham, Chase 3466, Hitchcock 2395; Patuxent, House 957. 



District of Columbia: Chase 2428, Hitchcock 384, Pollard 353, Ward in 1878. 



Virginia: Portsmouth, Chase 3683; Dismal Swamp, Tyler in 1905. 



North Carolina: Highlands, J". D. Smith in 1882, Wilsons Mills, Chase 3100. 



Georgia: Blue Ridge, Ruth in 1900; Rabun County, House 2258; Stone Moun- 

 tain, Hitchcock 385. 



Tennessee: Ducktown, Chambliss 24, 25. 



Alabama: Pisgah, Chase 4478. 



122. Panicum albemarlense Ashe. 



Panicum velutinum Bosc; Spreng. Syst. Veg. 1: 315. 1825, not Meyer, 1818. This 

 herbarium name is given as a synonym under P. lanuginosum Ell. and credited to 

 "W. herb." The specimen, in the Willdenow Herbarium, is the vernal form of 

 P. albemarlense. 



Panicum albemarlense Ashe, Journ. Elisha Mitchell Soc. 16: 84. 1900. "Common 

 in well drained open woods in Beaufort and Hyde counties, N. C, where the type 

 material was collected by me May 26, 1899, near Scran ton." The type specimen has 

 been arbitrarily chosen from unmounted material in Ashe's herbarium in a cover 

 marked on the outside-' 'P. albemarlense, ' ' and on a sheet upon which is written ' ' Pani- 

 cum ? very common in N. E. Beaufort County, also in Hyde, in open woods well 

 drained." There is nothing to indicate in which place the specimens were collected, 

 except the published statement cited above. All the specimens are of the vernal 

 form. 



DESCRIPTION. 



Vernal form olivaceous; culms cespitose, 25 to 45 cm. high, slender, at first erect or 

 ascending, soon becoming geniculate at the lower nodes and more or less spreading; 

 culms, sheaths, and blades grayish- villous, the blades 4.5 to 7 cm. long, 3 to 6 mm. 

 wide, ascending, the upper surface puberulent as well as long- villous; panicles 3 to 



5 cm. long, about as wide, more densely flowered than 

 P. meridionale, axis puberulent, branches ascending; 

 spikelets 1.4 mm. long, 0.9 mm. wide, blunt and tur- 

 gid, pilose; first glume about two-fifths the length of 

 the spikelet; second glume and sterile lemma sub- 

 equal, the glume scarcely equaling the fruit at matu- 



„ ,„ ' „ , ^ rity; fruit 1.25 mm. long, 0.9 mm. wide, obtuse. 



Fig. 217.— P. albemarlense. From J ' . ? ' ' 



type specimen. Autumnal form widely decumbent-spreading or as- 



cending, freely branching at all but the uppermost 

 nodes, the branches narrowly ascending, the reduced, flat blades mostly exceeding 

 the panicles. 



Allied to P. meridionale, from which it differs mostly in the usually stouter, spreading 

 culms, which often form large mats in the autumn, and in the softer, denser pubescence 

 which gives the entire plant a grayish tone. 



Two specimens from Wilsons Mills, N. C, Chase 3100£ and 3106 are doubtfully 

 referred here. The spikelets are 1.6 mm. long, and the whole plants suggest a very 

 slender vernal form of P. aciculare. 



