HITCHCOCK AND CHASE—TROPICAL NORTH AMERICAN PANICUM. 491 
This species resembles P. stenodes, but differs in having larger spikelets and papil- 
lose-pilose or at least papillose sheaths. The type specimen and Hitchcock’s no. 
8147 are conspicuously pilose on sheaths and blades, but the other specimens of this 
little-known species are papillose only or have a few hairs on the upper surface of the 
blades. 
DISTRIBUTION. 
Open grass land and moist savannas, 
Central America and northern South 
America. 
British Honpuras: Ycacos La- 
goon, Peck 681 (Gray Herb.). 
Costa Rica: Buenos Aires, Tonduz 
3583. 
Panama: Chorrera, Hitchcock 8147. 
Near Corozal, Hitchcock 9207. 
TRINIDAD: Piarco Savanna, south of Arouca, Hitchcock 10346. 
Fie. 63.—Distribution of P. stenodoides. 
46. Panicum caricoides Nees. 
Panicum caricoides Nees; Trin. Gram. Pan. 149. 1826. Trinius received the type 
specimen from Nees, ‘‘V. spp. Brazil. (N. ab Esenb.)” Nees! afterwards describes 
the species more fully and gives the original locality as ‘‘provincia Paraensi.’’ The 
type specimen is in the Trinius Herbarium at the St. Petersburg Academy of 
Science. It is evidently a portion of the specimen at the Munich Herbarium. This 
specimen, which is the basis of Nees’s later description, was collected in Pard by 
Martius. 
Panicum junciforme Steud. Syn. Pl. Glum. 1: 82. 1854. Given as a synonym of 
P. caricoides. 
DESCRIPTION. 
Perennial, in tufts; culms erect, slender, glabrous, stiff 
and wiry, as much as 90 cm. high; sheaths smooth; ligule 
membranaceous, lacerate, minute; blades appressed, nar- 
rower than the sheath, involute, glabrous, 1 to 5 cm. long, 
: the lower rarely longer; panicles terminal and axillary from 
IG. 64—P. caricoides. the upper sheaths, short-exserted, 1 to 1.5 cm. long, narrow, 
From type specimen. = : : ci 
nearly simple, the later panicles smaller, in fascicles of 2 or 
3, at first partially inclosed by the somewhat inflated sheaths, the pedicles bearing 
long erect white hairs just below the rather crowded spikelets; spikelets 1.5 to 1.8 
mm. long, about 0.8 mm. wide, turgid, glabrous; first glume about half gs long as 
the spikelet, subacute; second glume Lee iy 
and sterile lemma equal, covering the 
fruit, strongly nerved; fruit 1.4 to 1.5 
mm. long, 0.6 mm. wide. 
DISTRIBUTION. 
Wet savannas, Trinidad to Brazil. 
» 
oa . " 
/ Trintpap: Aripo Savanna, 
/ Cumuto Station, Hitchcock 
10069. Fa. 65.—Distribution of P. caricoides. 
1Acrost. Bue! 108. 1829. 
te eee flim, i Lan, Panrcbost Vlson [x 2a, 
