HITCHCOCK AND CHASE—GRASSES OF THE WEST INDIES. 38] 
Cuba, Jamaica, Santo Domingo, Porto Rico (the south and west coasts and on 
Vieques), St. Thomas, St. Croix, St. Jan, Antigua, Montserrat, Guadeloupe, 
Dominica, Martinique, Barbados, St. Vincent, Grenada, and Tobago. 
4. Bouteloua heterostega (Trin.) Griffiths, Contr. U. S. Nat. Herb. 14: 414. 
1912. 
Heterosteca juncifolia Desv. Nouv. Bull. Soc. Philom. Paris 2: 188. 1810, 
Eutriana heterostega Trin. Gram. Unifl. 242, 1824. 
Bouteloua humboldtiana Griseb. Mem. Amer. Acad. n. ser. 8: 532. 1862. 
Bouteloua porphyrantha Wright, Anal. Acad. Cienc. Habana 8: 201. 1871. 
Heterosteca rhadina Nash, Bull. Torrey Club 30: 386. 1903. 
Similar to the preceding, the blades longer, the spikes broader, usually 
shorter, the spikelets more closely arranged. 
Open ground, West Indies. Originally described from the Antilles, Heteros- 
teca juncifolia and Eutriana heterostega being typonyms, *The type of Boute- 
loua humboldtiana is from Cuba (Wright 734, 739); the type of Heterosteca 
rhadina is from Porto Rico (Helter 6057). Bouteloua porphyrantha was based 
upon Wright 739 in part, 734, and 3816. Griffiths (loc. cit.) selects the first 
specimen as the type. 
Cuba, Haiti, Santo Domingo, and Porto Rico. 
5. Bouteloua disticha (H. B. K.) Benth. Journ. Linn. Soc. Bot. 19: 105. 1881. 
Polyodon distichum H. B. K. Nov, Gen. & Sp. 1: 175. pl. 55. 1816. 
Culms elongate, straggling; leaves mostly clustered toward the base; spikes 
numerous, approximate in long terminal and axillary racemes. 
Open ground and dry hills, Pacific coast of Central America to Ecuador; 
also in the vicinity of Habana, Cuba, where it is apparently introduced. 
Originally described from Ecuador. 
82. TRIPOGON Roem. & Schult. 
Spikelets several to many-flowered, sessile, erect in a single spike; glumes 
shorter than the lowermost floret; lemmas awned from between the lobes of 
the minutely two-lobed summit. 
1. Tripogon spicatus (Nees) Ekman, Ark. fiir Bot. 11‘: 36. 1912. 
Bromus spicatus Nees, Agrost. Bras. 471. 1829, 
Tricuspis simplex Griseb. Mem. Amer, Acad. n. ser. 8: 582. 1862. 
Leptochloa spicata Scribn. Proc. Acad, Phila. 1891: 304. 1892. 
A low, densely tufted perennial, the subfiliform leaves aggregated at the base, 
the slender culms erect, spikelet-bearing for one-third to half their length. 
Sterile hills, Texas to Argentina; aiso in eastern Cuba (Wright 1551, the type 
of Tricuspis simpler). Originally described from Brazil. 
83. ELEUSINE Gaertn. 
Spikelets several to many-flowered, densely imbricate in thick spikes, these 
subdigitate; glumes and lemmas with thickened 5-nerved keels, acute; caryopsis 
with a thin pericarp marked with fine transverse lines. 
1. Eleusine indica (L.) Gaertn. Fruct. & Sem. 1: 8. 1788. GOOSE GRASS. 
Cynosurus indicus L. Sp. Pl. 72. 1753. 
A weedy annual with spreading or ascending flattened branching culms, thin 
flat linear blades, and 2 to several spikes (sometimes one spike 1 to 3 cm. 
below) 5 to 10 cm. long. 
Open ground and waste places. A common weed of warm and warm-tem- 
perate regions. Introduced in America; originally described from India. To 
