HITCHCOCK GRASSES OF CUBA. 235 



2. Homalocenchrus monandrus (Sw.) Kuntze, Rev. Gen. PI. 2: 777. 1891. 



Leersia monandra Sw. Prod. 21. 1788. 



Wright 731; Yumury Mountains, Rugel 200 in Gray Herbarium. 



There are two Wright specimens in the Grisebach Herbarium, both numbered 

 731, one collected in 1856-57, the other in 1859. Wright's 731 in the Gray Herba- 

 rium is labeled "In small tufts on precipitous hillsides, Loma de Rangel, July 11." 



49. ACHLAENA Griseb. Cat. PI. Cub. 228. 1866. 



I. Achlaena piptostachya Griseb. Cat. PI. Cub. 229. 1866. 



Wright 205; Pinar del Rio, Baker HC 3747; Isle of Pines,' Curtiss 236, Palmer & 

 Riley 913; Wright 3487 in National Herbarium. 



The Grisebach specimens are no. 205 of 1865 and no. 3487 of 1860-64 (type). 



50. REYNATTDIA Kunth, Rev. Gram. 1: 195. pi. 9. 1829. 



1. Reynaudia filiformis (Spreng.) Kunth, Rev. Gram. 195. 1829. 



Polypogon cubensis Rich, in Sagra, Hist. Cub. 11: 313. 1850. 



lFr^3428; Herradura, Baker HC 4825, Tracy 9070, Hitchcock in 1906; Isle of Pines, 

 Curtiss 371; Cienfuegos, Combs 579 in Gray Herbarium. The following are in the 

 herbarium of the New York Botanical Garden: Sagua, Britton & Wilson 334 ; Madruga, 

 Britton & Shafer 687. 



There are two Wright specimens in the Grisebach Herbarium, one from eastern 

 Cuba in 1860, no. " 116=3428," and another from western Cuba in 1863, no. "937= 

 3428 . ' ' Wright's 3428 in the Gray Herbarium is from ' ' Savannas, Chirigote, July 11 . " 



The type of Polypogon cubensis is at Paris. 



51. ARISTIDA L. Sp. PI. 82. 1753. 



Lateral awns minute or wanting 5. A. scabra. 



Lateral awns about as long as central awn. 



Awns united into a twisted base about 3 mm. long; blades involute, 



usually 3 to 5 cm. long 3. A . mohrii. 



Awns not united at base. 



Central awn 2 to 3 cm. long; blades elongated, 60 to 90 cm. 



long 2. A. erecta. 



Central awn about 1 cm. long; blades short and stiff. 



Awns recurved at base at maturity ; glumes about 6 mm. 



long; culm blades scattered 4. A. refracta. 



Awns ascending at base; glumes 8 to 9 mm. long; culms 

 rigid and rush-like, the blades often only 1 to 2 cm. long, 

 commonly approximate in pairs 1 . A. curtifolia. 



1. Aristida curtifolia sp. nov. 



Culms cespitose, from a perennial base, slender, stiffly erect, somewhat compressed, 

 smooth, 20 to 30 cm. high, the alternate internodes often shortened, thus bringing the 

 leaves together in approximate pairs; sheaths smooth, striate, short, 5 to 10 mm. long, 

 sometimes slightly villous at throat; blades short, thick, stiffly spreading, flat, folded 

 or involute, glabrous, 5 to 20 mm. long and 0.5 to 1 mm. wide, or the upper reduced 

 to mere awns 2 to 3 mm. long; inflorescence a narrow nearly simple panicle, 5 to 10 

 cm. long, the spikelets subsessile or occasionally terminating short erect branches 

 about 5 mm. long; glumes nearly equal, 8 to 9 mm. long, 1-nerved, smooth, except 

 the scabrous upper part of the keel of the lower glume; lemma 5 to 6 mm. long with 

 a minutely hairy callus 0.5 mm. long, scabrous toward apex; awns about equal, 10 

 to 12 mm. long, scabrous, spreading but not recurved or twisted at base. 



Type, Wright 736, 1865, no. 559960 in the U. S. National Herbarium, which also bears 

 the secondary numbers 282 and 286. Other specimens are: Wright 736 in eastern 



