490 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
TENERA. 
Second glume and sterile lemma exceeding the fruit; spikelets 
PD OUMGED 2:52 pe Peso ate ae ieee a ah ost AS pete, me aT ee ee 44, P. tenerum. 
Second glume and sterile lemma not exceeding the fruit; spikelets 
rather blunt. 
Pedicels bearing long stiff erect hairs at the summit....-----. 46. P. caricoides. 
Pedicels not hairy. 
Spikelets attenuate at base, about 2 mm. long; leaves more 
OR IOSSap UGS Lh. tk eae eet es cs ae ae ae 45. P.stenodoides. 
Spikelets not attenuate at base, about 1.5 mm. long; leaves 
SEL INO COMI ee ee ail ase Pi apathy ea alae etal eee ee gees ae 47. P. stenodes. 
44. Panicum tenerum Beyr. 
Panicum tenerum Beyr. in Trin. Mém. Acad. St. Pétersb. VI. Sci. Nat. 1: 341. 
1834; Contr. U. S. Nat. Herb. 15: 97. 
1910. 
DISTRIBUTION. 
Margins of sandy swamps and ponds 
and in wet places in sandy woods, 
southeastern United States, Cuba, and 
Porto Rico. The type specimen from 
Georgia. 
Cusa: Herradura, Hitchcock 154, 
Tracy 9080. Laguna Jovero, 
Shafer 10750. Laguna Los indios, Shafer 10807. Pinar del Rio, Wright 3870 
in part. 
Porto Rico: Campo Alegre, Chase 6617. 
Fig. 61.—Distribution of P. tenerum. 
45. Panicum stenodoides Hubbard. 
Panicum stenodoides Hubbard, Proc. Amer. Acad. 49: 497. 1913. ‘“‘Type (in the 
Gray Herb.) and only specimen seen, low pine ridge, Ycacos Lagoon, March 5, 1907, 
M. E. Peck, no. 681.’’ A portion of the type in Hubbard’s herbarium has been 
examined. 
DESCRIPTION. 
Plants perennial in dense tufts; culms erect, slender and wiry, glabrous or sparsely 
pilose below the glabrous nodes, 20 to 40 cm. high, producing from the upper nodes 
slender leafless panicle-bearing branches; sheaths papillose 
or more or less papillose-pilose, the lowermost bladeless, 
glabrous, in age fibrous; ligule membranaceous, about 0.3 
mm. long; blades erect, flat at base, involute toward the 
apex, 3 to 8 cm. long, 1 to 2 mm. wide, more or less papil- 
lose or papillose-pilose, at least on the upper surface, some- 
times glabrous; panicles short-exserted, usually exceeded 
by the uppermost blade, about 1 cm. long, narrow, bearing 
3 to7 spikelets on appressed scabrous pedicels, rarely a few Tage ganna eee 
delicate hairs at the apex of the pedicels; spikelets 2 to 2.1 type specimen: 
mm. long, 0.9 mm. wide, turgid, attenuate at base, glab- 
rous; first glume about half as long as the spikelet; second glume and sterile lemma 
subequal, barely covering the fruit, strongly nerved; fruit 1.7 mm. long, 0.8 mm. wide. 
to = 
