236 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Cuba, 1856-57 in Sauvalle Herbarium; Jata Hills at Guanabacoa, Hitchcock in 1906; 

 Baker & Hasselbring HC 7208, 7211; Madruga, Britton & Shafer 658 in Herb. N. Y. 

 Bot. Gard. 



There are two Wright specimens of this in the Grisebach Herbarium, "Savannas of 

 Guanacaro, July 28, in small tufts," no. 282 of 1865, and no. 736 from eastern Cuba, 

 1856-57. 



This species is readily recognized by its stiff, rush-like culms and short sharp- 

 pointed blades. On the Jata Hills it occurs on dry, grassy slopes. 



2. Aristida erecta sp. no v. 



Culms erect, rather stout, from a perennial root, about 1.5 meters high, glabrous; 

 sheaths glabrous, longer than the internodes; blades glabrous beneath, scabrous on 

 the nerves above, elongated, convolute, much attenuated at the tip, 3 to 5 mm. wide, 

 as much as 1 meter long; panicles 50 cm. long, the numerous scabrous branches ascend- 

 ing below, spreading above, the lower as much as 20 cm. long, all spikelet-bearing to 

 the base; spikelets crowded, the pedicels erect, stout, 2 to 3 mm. long, glumes gla- 

 brous, the first 12 to 15 mm. long, scabrous on the keel, abruptly cuspidate or awn- 

 tipped, 3-nerved, one of the lateral nerves somewhat indistinct, second glume 2 to 3 

 mm. shorter, acuminate, 1-nerved, smooth on the keel, lemma 12 to 13 mm. long, 

 glabrous, the callus about 1 mm. long, bearded, awns spreading, the central 2 to 3 

 cm. long, the lateral somewhat shorter. 



The type specimen was collected by Wright in Cuba in 1865, no. 41161, in the U. S. 

 National Herbarium. This specimen is numbered in pencil 2432, which is an error 

 for 3432. The corresponding specimen in the Grisebach Herbarium was collected in 

 western Cuba in 1863 and is numbered "928=3432." The only other specimen seen 

 is: Herradura, Tracy 9076. 



This species resembles A. palustris (Chapm.) Vasey, but differs in having taller 

 culms, larger and more spreading panicles, and longer glumes and lemma. In A. 

 palustris the panicle is narrow and strict, the glumes are about 10 mm. long and nearly 

 equal, and the lemma is only 7 to 8 mm. long. 



3. Aristida mohrii Nash, Rep. N. Y. Bot. Gard. 1: 436. 1900. 



In roads Hanabana, January 16, Wright 737; Wright 3433 in part; Wright 742 in 

 National Herbarium; Jata Hills at Guanabacoa, Hitchcock in 1906; La Caimanera, 

 Eggers 5389. 



The Grisebach specimen is from eastern Cuba in 1856-57, no. 737. Another Grise- 

 bach specimen, Wright "931=3433" from western Cuba, 1863, is doubtfully referred 

 here. It appears to be the same as the fragmentary specimen no. 742, mentioned 

 above. 



4. Aristida refracta Griseb. Cat. PI. Cub. 228. 1866. 

 Aristida gyrans Chapm. Bot. Gaz. 3: 18. 1878. 



Dry savannas, Chirigote, October 26, Wright 3431; dry savannas, Chirigote, October 

 31, Wright 3832; in dense bunches along rivulets in sandy soil, Pinar del Rio, October, 

 Wright 3834; in small dense tufts, sandy pine woods, Coloma, Pinar del Rio, October, 

 Wright 3833; Wright 3430, 3831; Jata Hills at Guanabacoa, Hitchcock in 1906; Herra- 

 dura, Hitchcock in 1906; Isle of Pines, Palmer & Riley 995, Taylor 20. 



In the Grisebach Herbarium are three Wright specimens of this: Western Cuba, 

 l^i;:5, no. "926=3431;" eastern Cuba, 1860, no. "122=3430;" western Cuba, 1863, no. 

 "908=3430." 



5. Aristida scabra (II. B. K.) Kunth, Rev. Gram. 62. 1829. 

 Streptachne scabra II. 15. K. Nov. Gen. & Sp. 1: 124. 1816. 

 Streptachne cubensis Rich.; Sagra, Hist. Cub. 11: 311. 1850. 



Pebbly pinales in small bunches, Pinar del Rio, October, Wright 3835; Puentes 

 Grandes, Leon 280; Triscornia, Hitchcock in 1906; Cojimar, Hitchcock in 1906. 

 The type of Streptachne cubensis is at Paris. 



