490 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
TENERA. 
Second glume and sterile lemma exceeding the fruit; spikelets 
pointed. . 2... 22.22.22. e eee eee eee eee 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 less pilose... ....-..---2-2---2-2---2-0----22---00- 45, P.stenodoides. 
Spikelets not attenuate at base, about 1.5 mm. long; leaves 
glabrous. . 2... 22... eee eee ee eee eee eee eee 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. 
—=aTly 3 
i int 
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on re. 4™ 
> 
1910. 
DISTRIBUTION. 
Margins of sandy swamps and ponds 
and in wet places in sandy woods, 
southeastern United States, Cuba, and 
‘ 
-. ee Porto Rico. The type specimen from 
{ Georgia. 
CuBa: Herradura, Jiitcheock 154, 
Tracy 9080. Laguna Jovero, 
Laguna Los Indios, Shafer 10807. Pinar del Rio, Wright 3870 
Fia, 61,— Distribution of P. tenerum. 
Shafer 10750. 
in part. 
Porto Rico: Campo Alegre, Chase 6617. 
45. Panicum stenodoides Hubbard. 
Panicum stenodoides Mubbard, 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 em. 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 to 7 spikelets on appressed scabrous pedicels, rarely a few 
delicate hairs at the apex of the pedicels; spikelets 2 to 2.1 
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. 
Fic. 62.—P. stenodoides. From 
type specimen. 
