264 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
3- to 5-nerved, half as long as the spikelet or a little less; second 
glume 5-nerved, slightly shorter than the spikelet; sterile lemma 
5-nerved, as long as the spikelet, staminate, the palea as long as 
the lemma, scabrous on the keels; fertile lemma as long as the 
sterile, pale, rather acute (fig. 220). 
Type in the United States National Herbarium, no. 1296166, col- 
lected in temporarily flooded places, Mendoza, prov. Pinar del Rio, 
Cuba, November 16, 1923, by E. L. Ekman (no. 18085). 
Dr. Ekman also collected this species at Jagiiey Chico, on the 
Handbana River, prov. Santa Clara (no. 17010). Dr. Ekman states 
on the label that it is found on both sides of the Handbana River 
(Santa Clara and Matanzas Provinces). 
The species appears to be allied to P. prionitis Nees, of Brazil, 
agreeing closely in the habit and foliage but with larger spikelets. 
Dr. Ekman wished to have the species named for Mr. F. J. Peterson, 
a good friend who aided him greatly in Cuba. 
26. Panicum tenerum Beyr., in Trin., Mém. Acad. St. Pétersb. VI. 
Sci. Nat. 1: 341. 1834. Georgia. 
Plants in small tufts from a knotted crown; culms erect, stiff, wiry, 
40 to 90 em tall; blades erect, firm, 4 to 15 cm long, 2 to 4 mm wide; 
panicles 3 to 8 cm long, narrow, the branches appressed, the pedicels 
usually with a few long hairs at the summit; 
spikelets about 2.5 mm 
long, narrowly ovate, glab- 
rous (fig. 221). 
Margins of swamps and 
wet places near the coast, 
southeastern United States, 
Bahamas, Cuba, and Puerto 
Rico. FIGURE 222.—Panicum cari- 
FIGURE 221.—Panicum tene- BawHAmMas: Andros [sland coides. Two views of 
rum. "Two views of spike- = amie spikelet, and floret, X 10 
let, and floret, X 10 (type). Brace 7019, (132 (both In (type). 
Field Mus. Herb.). 
Cusa: Pinar del Rio, Wright 3870; Hitchcock 23272. Herradura, 
Hitchcock 154; Tracy 9080; Ekman 10759. Laguna Jovero, Shafer 
10750. Laguna los Indios, Shafer 10807. Guane, Léon 6919, 
Jagiiey Grande, Ekman 16965. Baragud, Hitchcock 23378. Mordazo 
Léon 5977. Manacas, Léon 5856. Placetas del Sur, Léon 6416. 
Isla de Pinos, Britton and Wilson 14741, 15364, 15380, 15385. 
Dominican Repusiic: Cuenca, Ekman H 11009, 13331. El Valle, 
Ekman H 15653, H 15670, H 15701. 
Purrto Rico: Campo Alegre, Chase 6617. 
27. Panicum caricoides Nees; Trin., Gram. Pan. 149. 1826; Agrost. 
Bras. 108. 1829. Brazil. 
Culms tufted, erect, stiff and wiry, as much as 90 cm tall; blades 
appressed, narrower than the sheath, involute, 1 to 5 em long; panicles 
narrow, nearly simple, 1 to 1.5 cm long, the pedicels bearing long erect 
white hairs at the summit; spikelets 1.5 to 1.8 mm long, glabrous 
(fig. 222). 
Wet savannas, Trinidad to Brazil; Cuba. 
Cupa: Manacas, Léon 9305. Mordazo, Ekman 17048. Isla de 
Pinos, Britton and Wilson 14282, 14701. 
Trinipap: Aripo Savanna, Hitchcock 10069. O’Meara Savanna, 
Britton and Hazen 1564. 
