GRIFFITHS—-THE GRAMA GRASSES. 407 
27. Bouteloua vaneedeni Pilger. 
Bouteloua vaneedent Pilger in Urban, Symb. Antill. 6: 2. 1909; see also Boldingh, 
Recueil Trav. Bot. Néerland. 6: 7. 1909. 
DESCRIPTION. 
An erect, cespitose perennial, 30 to 40 cm. high; sheaths smooth, striate, close; 
blades narrow, involute, 6 to 10 cm. long, with a very small ligular ring of white hairs; 
inflorescence racemose, about 12 to 15 em. long; spikes small, 4 to 5 mm, long, and 
only about 1 mm. wide, numerous, about 30; spikelets 2 to 4, in specimens before 
me only the distal one fully developed, the proximal ones 1-flowered, the distal one 
with a second floret in the form of a trifid rudiment, the lateral 
awns very short; glumes smooth, strongly nerved, the first 3 
mm., the second 4 mm. long, scarcely awned; lemma smooth, 
4 mm. long, bearing awns less than 1 mm. long; palet about 
the length of its lemma, bearing very short awns. (Fiaure 56.) 
I am under obligations to both Doctors Pilger and Boldingh 
for specimens of this interesting species, collected by the latter 
(no. 3512 B) in the island of Anguilla, Leeward Islands. 
In general aspect it appears to be very similar to B. curti- 
pendula, while in other respects it even more closely resembles 
B. uniflora, In detail of the spike it bridges over three genera ; f 
oe + . . vaneedeni. a, Spike- 
as here limited. The species is interesting in that there are one let; b,c, lemma and 
to three aborted, 1-flowered spikelets below and only one well- _ palet with rudiment 
developed distal spikelet in which the second floret is the normal attached. a, Scale5; 
trifid awn, with, however, the lateral awns so short as to be © Sale 7.5. From 
scarcely visible. The type affords all the knowledge we have type specimen. 
concerning this species and that specimen is immature. 1t is possible that mature 
material will necessitate a different disposition of the species. 
Fia. 56.—Bouteloua 
28. Bouteloua americana (L.) Scribn. 
Aristida americana L. Amoen. Acad. 5: 393. 1759; Syst. Nat. ed. 10. 2: 879. 1759. 
This name has been misapplied by recent authors because of a misstatement by Munro@ 
concerning its identity. Munro says that A. americana ‘‘is called A. dispersa by 
Trin.’’, and that ‘“‘ Kunth has misplaced the Linnean synonym in Eutriana juncifolia.”’ 
Munro, however, was in error, as is easily shown by an examination of the Linnean 
plant (see under Bouteloua americana Scribn.); Swartz, Obs. Bot. 41. pl. 2. f. 2.1791. 
The type, in the Linnzan Herbarium, is a specimen from Jamaica, collected by 
Patrick Browne. 
Triathera americana Desv. Nouv. Bull. Soc. Philom. Paris 2: 188.1810. Based 
upon Aristida americana L. See also Roem. & Schult. Syst. Veg. 2: 421. 1817. 
Dineba americana Beauv. Ess. Agrost. 98, 160. pl. 16. f.1-8.1812. Based upon Aris- 
tida americana L. 
Heterosteca americana Desv. Journ. de Bot. 1: 68.1813. Based upon Aristida ameri- 
cana Swartz. 
Bouteloua litigiosa Lag. Gen. & Sp. Nov.5.1816. Based upon Aristida americana L. 
Aristida furcata Poit.; Roem. & Schult. Syst. Veg. 2: 711.1817. A herbarium 
name published as a synonym of Dineba americana Beauv. 
Euriana juncea Trin. Gram. Unifl. 238. 1824. The specimen in the Trinius Her- 
barium, collected by Poiteau in Haiti, probably is the Aristida americana of Linneeus. 
@ Proc. Linn. Soc. Bot. 6: 49. 1862, 
