270 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Froripa: Jacksonville, Curtiss 21, 3602*, 5588, Kearney 145; Baldwin, Hitch- 
cock 985; Lake City, Combs 127, Hitchcock 1027, 1037; Carabelle, Kearney 
92; Dunedin, Tracy 6726; St. Augustine, Canby in 1869; Indian River, 
Palmer 634 in 1874 in part; Melbourne, Curtiss 5804; Titusville, Chase 3965, 
Mitchcock 759; Jensen, Hitchcock 729; Sanford, Chase 4032, 4036, 4037, Hitch- 
cock 769, 778, 781, 828; Eustis, Chase 4053, Hitchcock 794, 806, 807, 318, 
Nash 51, 71, 335, 778, 1238; Oakland, Curtiss 6628; Lemon Bay, Tracy 7191, 
7200; Tampa, Combs 1344, Hitchcock 928, 934, 944; Braidentown, Hitch- 
cock 951, 952, 954, 973, Tracy 6732; Manatee, Hitchcock 975, Rugel 377; Myers, 
Chase 4153, 4156, 4171, Hitchcock 865, 866, 873, 885, 887, 895, 916, 924, Lee 
Co. PI. 472; Sneeds Island, Tracy 6451, 6464, 6693; Perdido, Tracy 8407. 
ALABAMA: Fort Morgan, Tracy 7207. 
Mississippi: Avondale, Tracy 4610; Mississippi City, Hitchcock 1114. 
In the herbarium of the Philadelphia Academy is a specimen said to be from 
Surinam which appears to be P. chamaelonche. 
0 161. Panicum glabrifolium Nash. 
Panicum glabrifolium Nash, Bull. Torrey Club 24: 196. 1897. ‘‘Collected by the 
writer in the ‘flatwoods’ at Tampa, Florida, on August 20, 1895, no. 2415a.”’ The 
type, in Nash’s herbarium, is the early branching state. The spikelets are 1.25 mm. 
long. The statement in the original description, ‘‘the spike- 
lets slightly exceeding .5 mm. in length” is doubtless a typo- 
graphical error. 
DESCRIPTION. 
Vernal form similar to that of P. chamaelonche, in smaller 
Fig. 2991p. glabrifoltum. tufts; culms stouter, more or less flattened, 15 to 50 em. high, 
From type specimen. erect or sometimes subgeniculate at base; blades firm, erect, 
or narrowly ascending 4 to 12 cm. long, or the lower occasion- 
ally asmuchas 20cm. long, 2 to 4mm. wide, usually involute at least toward the apex, 
glabrous; panicles 4 to 9 cm. long, two-thirds to three-fourths as wide, the branches 
ascending, the ultimate branchlets and spikelets more or. less secund along the lower 
side of the branches; spikelets 1.2 to 1.4mm. long, obovate, obtuse, turgid, glabrous; 
first glume about one-third as long as the spikelet; second glume shorter than the fruit 
and sterile lemma; fruit 1.1 to 1.2 mm. long, elliptic. 
Autumnal culms wiry, elongated, and spreading, with geniculate nodes and long 
internodes; freely branching from the middle and upper nodes, the blades long and 
narrow, overtopping the somewhat reduced panicles; winter leaves less numerous than 
in P. chamaelonche, as much as 10 to 15 cm. long, stiffly ascending. ; 
In the vernal form this species is distinguished from P. chamaelonche by the taller, ~ 
stouter culms, more involute blades, larger panicles, and slightly larger spikelets. The 
autumnal form is distinguished by the 
different branching habit. There are, 
however, intermediate specimens that 
appear to connect the two species, such 
as Hitchcock 893, from Myers, which has 
the tall culms, elongated lower blades 
and large panicles of P. glabrifolium but 
the smaller spikelets of P. chamaelonche. 
DISTRIBUTION. 
Low sandy woods, peninsular Florida. 
Frormwa: Crystal, Combs . 1024; 
Braidentown, Combs 1313, 
1316, Hitchcock 966, Tracy 6715; Manatee, Hitchcock 978, Simpson in 1889; 
Cedar Key, Combs 780; Bartow, Combs 1187. 
Fig. 300.—Distribution of P. glabrifolium. 
