MANUAL OF THE GRASSES OF THE WEST INDIES 15 
3. ARTHROSTYLIDIUM Rupr., Mém. Acad. St. Pétersb. VI. Sci. 
Nate 372 V839 
Spikelets few-flowered, in racemes, the lower 1 or 2 lemmas empty, 
the rachilla disarticulating between the florets (rarely below the 
glumes); stamens 3. Mostly climbing or trailing shrubs, the short 
fertile branches in fascicles on the main cane. In Cuba the species 
are called ‘‘tibisi’’, as are those of Lasvacis. 
Blades subcapillary, in dense fascicles, 1 to 8 mm wide, as much as 30 em long, 
Ghiaypian SOU G= Sa ee ee ee Se 1. A. CAPILLIFOLIUM. 
Blades not subeapillary, flat. 
Tips of culms and branches retrorse-scabrous. 
Florets about 10 mm long. Blades 7 to 9 mm wide______~_ 2. A. EKMANII. 
Florets about 7 mm long. 
Biladessa) OnG: maT: widem. Veen se oe he ee 3. A. HAITIENSE. 
Blades 10 to 12 mm wide, or those of the sterile branches as much as 
Biel Oi eye apg sew Mie ahs bo By Sih Ss Oe os 2 ag 2 4. A. MULTISPICATUM. 
Tips of culms and branches not retrorse-scabrous. 
Blades not more than 5 cm long (rarely 6 cm long in young shoots). 
Sheaths not bristly; inflorescence racemose________ 5. A. SARMENTOSUM. 
Sheaths conspicuously squarrose-bristly at summit; inflorescence elongate, 
consisting of distant groups of spikelets ip Ais ee Bs 6. <A. DISTICHUM. 
Blades or some of them at least 8 cm long. 
Bristles at summit of sheath very slender, 1 to 5 cm long. 
Spikelets erect, appressed; bristles 1 to 2 em long__7. A. FIMBRIATUM. 
Spikelets reflexed by a bend in the lower part; bristles 4 to 5 cm long. 
A. REFLEXUM. 
Bristles at summit of sheath wanting or less than 1 em long. 
Blades 3 to 4 mm wide, as much as 25 em long__9. A. ANGUSTIFOLIUM. 
Blades not so long and narrow. 
Spikelets in dense mostly 1-sided racemes__-_-_-_-- 10. A. PRESTOEI. 
Spikelets not in dense racemes. 
Main culms strigose. Blades linear-lanceolate, up to 15 mm wide; 
spikelets distant, appressed___________-- 11. A. PUBESCENS. 
Main culms not strigose. 
Blades puberulent, at least beneath, stiff, 5 to 10 em long, 3 to 5 
AU VWILG Se tie eee ke a BoM Es cep aS 12. A. URBANII. 
Blades glabrous. 
Rachis of short raceme strongly zigzag. Blades oblong- 
lanceolate, as much as 15 mm wide___13. A. EXCELSUM. 
Rachis straight. 
Racemes elongate, as much as 15 em long; blades linear- 
lanceolate, as much as 1 em wide____14. A. CUBENSE. 
Racemes short; blades as much as 8 em long and 12 mm 
WiC Ca apa Ne EIS Fs ST IR Mh es Sl ele ee 15. A. OBTUSATUM. 
1. Arthrostylidium capillifolium Griseb., Mem. Amer. Acad. (n. s.) 
8: 531. 1862. HKastern Cuba, Wright 738. 
Arundinaria capilifolia Hack., Oesterr. Bot. Ztschr. 53: 69. 1908. 
Climbing to a height of 15 m or more, repeatedly branching, swing- 
ing down from the trees in great curtains, or festooning lower growth, 
the linear or filiform blades crowded on short sterile branchlets, these 
arranged in dense whorls like great pompons at the distant nodes; 
inflorescence of numerous slender wiry, not zigzag racemes borne 1 in 
the whorls of branchlets, the appressed rather distant spikelets about 
1 cm long. 
Dryish thickets and wooded slopes, northern West Indies. 
Banamas: New Providence, Eggers 4242; Brace and Britton 537; 
Geogr. Soc. Baltimore 46; Curtiss 94; Hitchcock in 1890; Field 319. 
60256—36—2 
