SO MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
ing, minutely scabrous, long-acuminate, 5 to 10 cm long, 1 to 2 mm 
wide; panicles narrow, 5 to 10 cm long, the branches appressed or 
ascending; glumes less than 0.5 mm long, somewhat unequal, obtuse 
or acutish; lemma narrow, scaberulous toward the narrowed minutely 
bifid tip, about 2 mm long; awn capillary, somewhat flexuous, about 
1.5 em long (fig. 46). 
Limestone hills, Cuba; Texas and 
northern Mexico. 
Cusa: Vifiales, Loma de la Bandera, 
north of Pinar del Rio, Hkman 16547. 
39. SPOROBOLUS R. Br., Prodr. FI. 
Nov. Holl. 169. 1810. Droprsrrp 
Spikelets, 1-flowered, the rachilla 
disarticulating above the glumes: 
glumes usually unequal, the second 
often as long as the spikelet; lemma 
membranaceous, l-nerved, awnless; 
palea usually prominent and as long 
as the lemma or longer; seed often 
free from pericarp. Species of West 
Indies all perennial, except S. baham- 
ensis and S. tenurssimus. 
Plants annual. Panicle open; spikelets 
about 1 mm long. 
Glumes nearly equal, 0.3 to 0.4 mm long. 
. S. BAHAMENSIS. 
Glumes unequal, the first one-fourth, 
the second half as long as the spikelet. 
2. SS. TENUISSIMUS. 
Plants perennial. 
Creeping rhizomes present. Panicles 
pale, spikelike; leaves conspicuously 
distichous= =! 222 2— 10. §S. VIRGINICUS. 
Creeping rhizomes wanting. 
Figure 46.—Muhlenbergia parviglumis. Panicle large and diffuse, at least half 
ese PS 1p. GUnEEEGS) ELC) stony 2 I the entire height of the plant. 
(Vasey). 
3. S. BRASILIENSIS. 
Panicle narrow, contracted or if somewhat open not diffuse, less than one- 
third the entire height of the plant. 
Glumes both shorter than the spikelet. 
Glumes nearly equal, about 0.5 mm long; branches of panicle slender, 
somewhat loosely arranged and spreading; basal sheaths scarcely 
Compressed. tc NL oR 2 RNC EN 4, §. INDICUS. 
Glumes unequal, the first about one-third as long as the spikelet, the 
second a little longer; branches of the panicle short, contiguous, the 
panicle thus rather compact and spikelike; basal sheaths com- 
TOTESSE CBSA PINE IIE 7 1 UN (lak MR a ce StS UE 5 oS) POIREDte 
Glumes unequal, the second as long as the spikelet. 
Spikelets 1.5 mm long; panicle pyramidal-__---_-_-- 6. S. PYRAMIDATUS. 
Spikelets 2 to 4 mm long; panicle elongate-oblong. 
Panicle green or whitish; spikelets about 2 mm long. 
7. S. DOMINGENSIS. 
Panicle purple; spikelets 3 to 4 mm long. 
Basal sheaths copiously felty-ciliate; spikelets about 4 mm long. 
. SS. CUBENSIS. 
Basal sheaths not felty; spikelets 3 mm long._9. S. PURPURASCENS. 
