274 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Porto Rico (near San Juan and Maricao), Santo Domingo, Haiti, Martinique, 
and Trinidad (Arima, Broadway 2374). 
6. ERIANTHUS Michx. 
Spikelets all perfect, awned, silky-pubescent; rachis disjointing; racemes 
arranged in a large dense panicle. 
1. Erianthus saccharoides Michx. Fl. Bor. Amer. 1: 55. 1803. 
A robust tall erect unbranched perennial with long harshly pubescent blades 
and tawny or purplish plumy panicles up to 40 cm. Jong. 
Swamps and moist soil from New Jersey to Florida and Texas on the Coastal 
Plain; also in Cuba. No definite locality is mentioned in the original descrip- 
tion, but the range is given “a Carolina ad Floridam.” 
Cuba (Laguna Jovero to Laguna Herradura, Shafer 10934, and Laguna San 
Mateo, Wright 3903). 
ERIANTHUS RAVENNAE (L.) Beauv. (Saccharum jamaicense Trin,’ Erianthus 
jamaicensis Anderss.; HE. ravennae var. jamaicensis Hack.) was described by 
Trinius from Jamaica, but his specimen was doubtless a cultivated plant, the 
species being grown for ornament in warm climates. 
7. ISCHAEMUM L. 
Sessile spikelets perfect, awned; pedicellate spikelets perfect but not always 
fruitful; rachis disjointing; racemes 2 to several, digitate, in pairs, usually so 
appressed to each other as to appear like a single spike. 
Racemes 2 at the apex of the culms; first glume strongly rugose across the back. 
1. I. rugosum. 
Racemes several in a cluster at the apex of the culms; first glume not rugose. 
2. I. latifolium. 
1. Ischaemum rugosum Salisb. Icon. Stirp. Rar. 1: pl. 1, 1791. 
A branching annual, geniculate below, with bearded nodes and flat, sparsely 
pilose blades, the 2 erect racemes so closely appressed to each other as often 
to appear like a single spike. 
Waste places in Cuba and Jamaica; introduced from the Old World. Origi- 
nally described from India. 
2. Ischaemum latifolium (Spreng.) Kunth, Rév. Gram. 1: 168. 1829. 
Andropogon latifolius Spreng. Syst. Veg. 1: 286, 1825, 
Ischaemopogon latifolius Griseb. F). Brit. W. Ind. 560. 1864. 
Larger and stouter than the preceding, decumbent, rooting at lower nodes, 
the glabrous blades up to 20 cm, long and 8 cm. wide, the inflorescence fan- 
shaped. 
Moist, shady places, southern Mexico and the Lesser Antilles to Brazil and 
Ecuador. Originally described from the West Indies, Guadeloupe and Mar- 
tinique being mentioned. 
Guadeloupe, Dominica, Martinique, St. Lucia, St. Vincent, and Trinidad. 
ISCHAEMUM ANGUSTIFOLIUM (Trin.) Hack. In the herbarium of the Botani- 
cal Department, Trinidad, is a specimen of this collected in 1895 by J. H. Hart, 
and said to be introduced. It is distinguished by its elongate narrow blades, 
RHYTACHNE ROTTBOELLIOIDES Desv.; Hamilt. Prodr. Pl. Ind. Occ. 11. 1825. 
Described from a specimen purporting to be from the “Antilles” in the 
*Mém. Acad. St. Pétersb. VI. Math. Phys. Nat. 2: 312. 1832. 
