298 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
much as 9 mm wide, rounded or somewhat cordate at base with a 
petiole about 0.5 mm long, minutely scaberulous on the nerves on the 
upper surface, glabrous beneath except for a little pubescence near the 
base; panicles narrow, few-flowered, 2 to 2.5 cm long, the few branches 
narrowly ascending or appressed, 5 to 15 mm long, the lateral pedicels 
0.3 mm long; spikelets lanceolate, nearly terete, acute or acuminate, 
glabrous, strongly nerved, 3 mm long; first glume half as long as the 
spikelet, 3-nerved; second glume and sterile lemma equal, 5-nerved, 
acuminate; fertile lemma pale, a little shorter than the spikelet, 
acute, the wings wanting (fig. 287). 
Type in the United States National Herbarium no. 1387342, col- 
lected on moist logs in forest, Sabanos, prov. Oriente, Cuba, by E. L. 
Ekman (no. 6536). Known only from the type collection. 
3. Ichnanthus tenuis (Presl) Hitchc. and Chase, Contrib. U.S. Natl. 
Herb. 18: 334. 1917. 
Oplismenus tenuis Presl, Rel. Haenk. 1: 319. 1830. Mexico, Pan- 
ama. 
Panicum exile Steud., Nom. Bot. ed. 2. 2: 256. 1841. Based on 
Oplismenus tenuis Presl. 
se alsinoides Griseb., Fl. Brit. W. Ind. 550. 1864. Trini- 
ad. 
Ichnanthus alsinoides Munro; Hemsl., Biol. Centr. Amer. Bot. 3: 
500. 1885. 
Apparently annual; culms slender, spreading or creeping, rooting 
at the nodes, much branched, the fertile shoots ascending, 10 to 20 
em high; blades lanceolate, 2 to 5 cm long, 4 to 10 mm wide, thin, 
glabrous or puberulent; panicles terminal and axillary, 2 to 4 cm 
long, mostly on long slender peduncles; spikelets narrowly lanceolate, 
3 mm long, acuminate, hispid. 
Grisebach’s description of Panicum alsinoides applies to J. tenuis 
which is not known from Jamaica. Grisebach gives as original local- 
ities, ‘“Hab. Jamaica!, March; St. Kitts!; Trinidad!, Pd.’”’ March’s 
specimen (sterile) in the Gray Herbarium is Oplismenus setarvus. 
Purdie’s specimen at Kew Herbarium is J. tenwis. 
Damp shady places, at low and medium altitudes, Central America, 
Colombia, and Trinidad. 
TRINIDAD: Maracas, Broadway in 1925. Maraval, Broadway 4912, 
4913. Arima, Hitchcock 10313. St. Joseph, Hitchcock 10174 (Amer. 
Gr. Nat. Herb. 580). Port-of-Spain, Hitchcock 10052, 10199. Blanch- 
isseuse Road, Broadway 5539. 
4. Ichnanthus nemorosus (Swartz) Doell, in Mart., Fl. Bras. 27: 289. 
1877. 
Panicum nemorosum Swartz, Prodr. Veg. Ind. Occ. 22. 1788. 
Jamaica. 
Milium nemorosum Moench, Meth. Sup. 67. 1802. 
Echinolaena nemorosa Kunth, Rév. Gram. 1: 54. 1829. 
Differing from J. pallens in the more prostrate habit, thinner, usually 
proportionately broader, sparsely pilose blades and the blunter 
spikelets. 
Shady banks and rich woods, West Indies, Mexico, and Central 
America. 
