20 MISC. PUBLICATION 243, U.S. DEPT. OF AGRICULTURE 
or tessellate, the summit bearing several slender bristles as much as 
5 cm long; blades ascending, linear-lanceolate, rounded at base, acu- 
minate, glabrous, scabrous on the margins, 5 to 15 cm long, 7 to 10 
mm wide; panicles very slender, 10 to 20 cm long, the spikelets few 
to several on short distant appressed branches, the axis glabrous; 
spikelets terete, about 6 mm long, reflexed by a bend in the lower 
part; first gclume 0.5 mm long; second glume a little longer than the 
first; first lemma sterile. The spikelets appear to be undeveloped or 
abortive, much as in A. distichum. 
Type in the United States National Herbarium, no. 1502075, col- 
lected in dense thickets on the top of Sierra de Sitio Santo Tomas, 
Vifiales, prov. Pinar del Rio, Cuba, altitude 700 m, November 10, 
1923, by E. L. Ekman (no. 18020). 
Other specimens, both from Vifiales are: Sitio Santo Tomas, steep 
cliffs, 500 m, Ekman 16627 and Loma de la Bandera, jurassic lime- 
stone, Hkman 16570 (sterile). 
The spikelets of no. 16627 are better developed. There appears 
to be but one fertile floret above two sterile lemmas and a reduced 
floret above the fertile one. The spikelets are about 7 mm long; fer- 
tile lemma slightly inflated, about 5 mm long. 
9. Arthrostylidium angustifolium Nash, Torreya 3: 172. 1903. 
Cuba, Underwood and Earle 941. 
Cums 2 to 3 m long, freely branching, clambering over shrubs; 
ultimate branches leafy, with short overlapping compressed sheaths; 
blades erect, somewhat scabrous, elongate, as much as 25 cm long, 
3 to 4mm wide; panicles strict, 20 to 30 cm long, the branches erect; 
spikelets narrow, 1 to 2 cm long, the rachilla straight; fertile lemmas 
6 to 7 mm long. 
Wooded mountain slopes, Cuba. Known only from the type col- 
lection, El Yunque, Baracoa, Cuba, Underwood and Earle 941. 
10. Arthrostylidium prestoei Munro, Kew Bull. Misc. Inf. 1895: 186. 
1895; Pilger, in Urban, Symb. Antill. 2: 338. 1901. Trinidad. 
Culms rather robust, bearing at the distant nodes dense whorls of 
slender branches about 30 cm long, these bearing one or two rather 
thin elongate-lanceolate blades toward their summits and terminating 
in a densely flowered, mostly one-sided raceme; spikelets pale, about 
15 mm long; lemmas about 8 mm long, short-awned. 
Forests, Trinidad and Colombia. Described from specimens col- 
lected by Prestoe in Trinidad and from plants cultivated at Kew. 
Trinipap: Bot. Gard. Herb. 1675. Caparo Forests, Broadway 4922. 
11. Arthrostylidium pubescens Rupr., Mém. Acad. St. Pétersb. VI. 
Sci. Nat. 3': 119. 1839. Trinidad. 
Arundinaria pubescens Hack., Oesterr. Bot. Ztschr. 53: 69. 1903. 
Culm 60 to 80 cm tall (fide Broadway), slender, roughish, the leafy 
sterile branches 8 to 10 cm long, rather rigid, divergent, in remote 
fascicles, the rough blades 8 to 15 cm long, 6 to 10 mm wide;racemes 
in dense fascicles, the spikelets appressed to the stiff axis; lemmas 
about 1 cm long. 
Mountain tops, Trinidad, Tobago, and Venezuela. 
TrinrpAD: Blanchisseuse Road, Broadway 5544. Heights of Aripo, 
Broadway 9927, 9928. Morne Bleu, Freeman in 1921. Without 
locality, Bailey T 3. 
Topaco: Road to Roxborough, Broadway 4894. 
