398 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Climbing to a height of 15 meters or more, repeatedly branching, swinging 
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 slen- 
der wiry, not zigzag racemes borne in the whorls of branchlets, the appressed 
rather distant spikelets about 1 cm. long. 
Dryish thickets and wooded slopes, northern West Indies. Originally de- 
scribed from eastern Cuba, the type being Wright 738. 
Bahamas (Andros, Great Exuma, New Providence), Cuba, Porto Rico 
(Maricao, Sabana Grande, and on the island of Vieques), and St. Thomas. 
2. Arthrostylidium sarmentosum Pilger in Urban, Symb. Antill. 4: 108. 1908. 
Culms apparently herbaceous, not over 3 mm. thick, high-climbing and 
pendent from trees as in the preceding; branchlets commonly 10 to 15 cm. long, 
leafy, in distant usually dense whorls, the foliage pale green, drying glaucous, 
the divergent blades 3.5 to 5 cm. long, 3 to 5 mm. wide, rather thin; inflo- 
rescence of numerous short-exserted terminal and axillary zigzag racemes of 
2 to 5 narrow pubescent spikelets. 
Along streams and trails; wet mountain forests, at higher altitudes, Province 
of Oriente, Cuba (Monte Verde, Yateras), and Porto Rico. Originally de- 
scribed from sterile specimens from Porto Rico, Heller 1089, Sierra de Luquillo, 
and Sintenis 354, 4046. Collected in flower only once’ (Chase 6730, Amer. 
Gr. Nat. Herb. 3997) on the north slope of El Yunque, Porto Rico. 
8. Arthrostylidium distichum Pilger in Urban, Symb. Antill. 2: 342. 1901. 
Branches solitary or in small fascicles, the approximate lanceolate-acuminate 
spreading blades about 2.5 cm. long. 
Only known from the type collection, Wright 3808 from Rangel, Pinar del: 
Rio, Cuba. 
4. Arthrostylidium fimbriatum Griseb. Mem. Amer. Acad. n. ser. 8: 531. 1862. 
Branches solitary(?), appressed; blades commonly reflexed, rather rigid, 
narrowly cuneate; racemes terminating nearly leafless branches, the axis 
straight, the spikelets appressed. Originally described as 1 to 8 feet tall, but 
probably several meters tall. 
Dense mountain woods, eastern Cuba (Wright 1554, the type specimen, and 
Loma Mensura, Shafer 3771). 
5. Arthrostylidium prestoei Munro, Kew Bull. Misc. Inf. 1895: 186. 1895; 
Pilger in Urban, Symb. Antill. 2: 338. 1901. 
Culms rather robust, bearing at the distant nodes dense whorls of slender 
branches about 30 cm. long, these bearing 1 or 2 rather thin elongate-lanceolate 
blades toward their summits and terminating in a densely flowered, mostly 
one-sided raceme. 
Trinidad and Colombia. Described from specimens collected by Prestoe in 
Trinidad (Trin. Bot. Gard. Herb. 1675) and from plants cultivated at Kew. 
Found also in Caparo Forest (Broadway 4922). 
6. Arthrostylidium urbanii Pilger in Urban, Symb. Antill. 2: 839. 1901. 
Arundinaria urbanitt Hack Oesterr. Bot. Zeitschr. 58: 69. 1908. 
Rather robust, bearing stiff wiry branches in whorls at the distant nodes, 
the rather rigid sublinear blades often reflexed, readily falling from the crowded 
overlapping sheaths; branches terminating in slender racemes, the spikelets 
appressed to the straight axis. 
* Chase, Bot. Gaz. 58: 277-279. pl. 27. 1914. ? See footnote, p. 405. 
