MANUAL OF THE GRASSES OF THE WEST INDIES 137 
Pieaeierdideneracdsisvathore Lexa. and Mexicon Cuha: Gouth 
America. 
Cusa: Casa Blanca, Habana, Ekman 16879. 
56. BOUTELOUA Lag., Var. Cien. 2*: 134. 1805. Grama 
Spikelets, 1-flowered, with the rudiments of 1 or more florets above, 
sessile, in two rows along one side of the rachis; glumes unequal, 1- 
nerved, acuminate or awn-tipped, the first shorter and narrower; 
lemma as long as the second glume or a little 
longer, 3-nerved, the nerves extending into short 
or often rather long awns, 
the internerves usually ex- 
tending into teeth; palea 
2-nerved, sometimes 2- 
awned; rudiment various, 
usually 3-awned, a second 
rudimentary floret some- 
times present. Perennials 
or sometimes annuals, with 
few to many spikes race- 
mose on a common axis, 
sometimes solitary, the 
spikelets few to many in 
each spike, rarely solitary, 
pectinate or more loosely 
arranged and appressed, 
the rachis of the spike 
usually produced beyond 
the insertion of the 
spikelets. 
Plants annual. Culms widely 
spreading_.5. B. DISTICHA. 
Plants perennial. 
Spikes numerous, usually 
more than 10. 
Awns very short; culms 
about 30 cm tall. 
1. B. VANEEDENII. 
Awns conspicuous, about 
as long as the spikelet; 
culms mostly less than 
20 cm tall. 
2. B. JUNCEA. 
Spikes mostly less than 10. 
Spikes divergent, rather 
FIGURE 85.—Trichloris = FIGURE 86.—Bouteloua 
pluriflora. Glumes distant, see id vaneedenii. Panicle, 
and florets, X 5 (Grif- ; 3. 9. AMERICANA. x l;spikelet, X5 
fiths 6484). Spikes less distant, broader (Ekman 15546). 
and shorter. 
4, B.HETEROSTEGA. 
1. Bouteloua vaneedenii Pilger, in Urban, Symb. Antill. 6: 2. 1909. 
Anguilla, Boldingh 3512. 
Perennial; culms cespitose, erect, slender, about 30 cm tall; blades 
involute, filiform, glabrous; spikes 10 to 20, on an axis 8 to 15 cm long, 
2 to 5 mm apart, finally reflexed, 5 to 8 mm long; spikelets mostly 2 
to each spike; awns very short (fig. 86). 
