56 Britton: Studies of West Indian plants — XI 



Rynchospora Blauneri Britton, sp. nov. 



Perennal by short rootstocks; culms filiform, weak, clustered, 

 glabrous, 3-5 dm. long; leaves filiform, glabrous, shorter than 

 the culms; spikelets narrowly oblong, 3 mm. long, few together 

 in 2 or 3 distant compact clusters subtended by a filiform bract 

 3-5 cm. long; scales ovate-oblong, acute, light brown; bristles 

 none; achene obovate, light brown with darker brown margins, 

 smooth, about 1 mm. long; tubercle conic, acute, about one- 

 third as long as the achene. 



Sierra de Luqiullo (Blauner 247, in herbarium of Columbia 

 University, collected in 1852-53). Referred by Clarke to R. 

 divergens. 



Rynchospora luquillensis Britton, sp. nov. 



Perennial by rootstocks; culms very slender, smooth, erect, 

 about 2 dm. high. Leaves narrowly linear, about 1 mm. wide, 

 flat, smooth, shorter than the culm; inflorescence a small ter- 

 minal cluster of few spikelets; spikelets narrowly oblong, about 

 4 mm. long; scales oblong, brownish, acute; bristles about 6, 

 retrorsely barbed, a little longer than the achene; style elongated ; 

 achene narrowly obovate, smooth, brown, about 2 mm. long; 

 tubercle subulate, about as long as the achene. 



Sierra de Luquillo {Brother Hioram 364.) 



67. AN UNDESCRIBED SIPHOCAMPYLUS FROM HAYTI 

 Siphocampylus pinnatisectus Gleason, sp. nov. 



Stem herbaceous, erect, slender, glabrous. Leaves alternate, 

 broadly oblong in general outline, 5-7 cm. long, 3-3.5 cm. wide, 

 narrowed at base into a petiole, glabrous, deeply pinnatisect 

 into a terminal and 5-7 pairs of lateral linear lobes, each lobe 

 and the rhachis about 2 mm. wide, with 2-4 sharp salient teeth 

 or the smaller entire, sharply acute or submucronate, with a 

 single midvein and faint lateral veinlets; flowers in the upper 

 axils, few in number, appearing subcorymbose by the shortened 

 internodes, on minutely puberulent pedicels 1 cm. long; hypan- 

 thium obconic, acute at base, 3 mm. high; calyx-lobes narrowly 

 linear-triangular, acuminate, erect, separated by narrow acute 

 sinuses corolla red, about 25 mm. long, narrowly tubular, some- 

 what curved ventrally, constricted at base, gradually enlarged 

 upward, 3 mm. in diameter at the throat, its lobes all depressed, 

 3-4 mm. long. 



Type, Nash and Taylor 1701, collected on an open sunny 

 hillside, between La Brande and Mt. Balance, Hayti, at altitude 

 of 3150 ft., August 15, 1905. 



Siphocampylus pinnatisectus differs from all other West Indian 

 members of the genus in its deeply pinnatisect leaves. 



