314 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Palm barren, Cuba. Known only from the type collection from Santa Clara, 

 Britton & Wilson 6116. 



31. Paspalum breve Chase in Hitchc. in Urban, Symb. Antill. 7: 166. 1912. 



A low glabrous stoloniferous perennial forming dense mats, the subfiliform 

 flat culms 5 to 8 cm., rarely 10 cm., tall, the numerous basal blades about 5 cm. 

 long, 2 to 4 mm. wide, flat, somewhat involute in drying ; racemes solitary, 10 

 to 12 cm. long, the imbricate, shining, broadly oval spikelets about 1.4 mm. long. 



Stony slopes, Cuba (Province of Habana, whence originally described, Le6n 

 1996 from Marianao being the type), and Sancti Spiritus. 



32. Paspalum caespitosum Fliigge, Monogr. Pasp. 161. 1810. 



Paspalum heteropJiyllum Desv. ; Poir. in Lam. Encycl. Suppl. 4: 315. 1816. 



Paspalum lanceaefolium Desv. Opusc. 58. 1831. 



Densely cespitose, the slender culms commonly 30 to 60 cm. tall, with a 

 hardened slightly enlarged base ; blades commonly 10 to 20 cm. long and 4 

 to 7 mm. wide, often bluish, rather firm, flat, usually somewhat involute in 

 drying; racemes mostly 3 to 5, remote, ascending, commonly 2 to 3 cm. long, 

 the crowded obovate spikelets about 1.6 mm. long, in pairs, mostly pale with 

 green nerves, minutely pubescent. The blades are variable in size and shape, 

 usually but not always narrowed at the base. 



Limestone cliffs and slopes, mostly near the coast, Florida, Bahamas, and 

 the Greater Antilles. Paspalum caespitosum and P. heteropJiyllum were de- 

 scribed from Santo Domingo. Paspalum lanceaefolium is a second name for 

 P. tieteropliyllum. 



Bahamas (Andros and Great Exuma), Cuba, Jamaica, Santo Domingo, and 

 Porto Rico. 



33. Paspalum portoricense Nash, Bull. Torrey Club 30: 377. 1903. 



Tufted, usually olivaceous, the slender culms spreading, 25 to 40 cm. long; 

 blades rather thin, flat, commonly 5 to 10 cm. long, 4 to 5 mm. wide (rarely 

 narrower and involute) ; racemes 2 or 3, remote, slender, laxly arcuate-ascend- 

 ing, 4 to 6 mm. long; spikelets elliptic, about 1.7 mm. long and 0.8 mm. wide, 

 subacute, minutely appressed-pubescent, in pairs, not crowded. 



Open hilltops and slopes, mostly in red clay, Bahamas (Crooked Island) and 

 Porto Rico (not infrequent). Originally described from Porto Rico, Heller 524, 

 collected between Aibonito and Cayey, being the type. This may be Paspalum 

 richardii Steud. 1 , the description of which, from " ins. Antillae," well applies 

 to this species. 



34. Paspalum simpsoni Nash, Bull. Torrey Club 24: 39. 1897. 



Glabrous; culms commonly 0.5 to 1 meter tall, slender, erect or ascending, 

 a leafless flowering branch sometimes borne at the upper node, otherwise 

 simple; blades flat, firm, 5 to 15 cm. long, rarely longer, 5 to 10 mm. wide; 

 racemes few to several, arcuate-spreading, remote on a very slender axis, the 

 minute obovate glandular-pubescent spikelets in pairs, crowded. 



Open or brushy limestone soil, southern Florida, the Bahamas, and the 

 Greater Antilles. Originally described from Florida. 



Bahamas (Great Bahama, Andros, Nassau, New Providence, Watling Island, 

 Inagua), Cuba (on the south coast), Jamaica, and Porto Rico. 



35. Paspalum glabrum Poir. in Lam. Encycl. 5: 30. 1804. 

 Paspalum milioideum Desv. ; Poir. in Lam. Encycl. Suppl. 4: 315. 1816. 

 Paspalum miliare Spreng. Syst. Veg. 1: 247. 1825. 



Paspalum helleri Nash, Bull. Torrey Club 30: 376. 1903. - 



1 Syn. PI. Glum. 1: 17. 1854. 



