500 PROCEEDINGS OF THE AMERICAN ACADEMY. 
axillaris Beauv. Agrost. 166, Atlas 15, t. 24 f. 2 (1812).— Forest, 
Toledo, September 12, 1906, M. FE. Peck, no. 507. 
ARISTIDA DIVARICATA Humb. & Bonpl. ex Willd. Enum. Hort. 
Berol. 99 (1809).— Pine ridge near Manatee Lagoon, July 18, 1905, 
M. E. Peck, no. 72. 
Aristida pseudospadicea, sp. nov., perennis, dense caespitosa, circa 
80 em. altitudine, radicibus fibrosis. Culmi erecti, tenues sed rigidi, 
basin versus aliquid ramosi, supra simplices, albo-virides, ad nodos 
purpurascentes, omnino glabri. Vaginae e basi imbricata tumidius- 
cula paullum angustatae, in parte superiori culmos laxissime includ- 
dentae vel patentes, quam internodia multo breviores, glabrae, ad 
folii junctionem angulo recto abruptissime contractae et cum annulo 
atro-brunneo cinctae. Ligula annularis brevis hispida in auriculas 
vaginae procurrens, circa. 0.2 mm. longa. Folia baseos superioribus 
similia, erecta, plana vel conduplicata, longe setaceo-acuminata, 8-30 
em. longa, 1-2 mm. lata; lamina subtus glabra, supra sparse longe 
tenuiterque pilosa basin versus pilis crebrioribus instructa. Inflores- 
centia panicula simplex, gracilis; 20-26 cm. longa, 2-4 em. diametro; 
radiis in axillis solitariis (per occasionem secundo breviore), adpresso- 
ascendentibus vel paullo patentibus, inferioribus remotis; axe radiisque 
glabris. Spiculae glabrae, albo-virides vel paullum albo-violaceae, 
9-11 mm. longae, circa 1 mm. diametro, callo obconico in summa parte 
barbato, circa 1 mm. longo; glumae carinatae, 1-nervatae, gluma 
prima in nervo scabra, acuminata, quam secunda aliquanto breviorl, 
gluma secunda aristato-acuminata vel paullum bifida cum arista brev1; 
lemma quam. gluma secunda longius, ad apicem aliquid tortum, 
scabrum, partibus tribus aristae divaricatis, subaequantes vel laterali- 
bus multo brevioribus, parti media ad 35 mm. longa; palea circa 1 mm. 
longa.— Type (in the Gray Herb.) and only specimen seen, pine ridge 
near Manatee Lagoon, June 11, 1905, M. E. Peck, no. 31. A. pseudo- 
spadicea is most nearly allied to A. spadicea HBK. from which it differs 
in its more slender habit, absence of flat curled basal leaves, long-pilose 
upper leaf-surface and smaller spikelets. Similar differences separate 
it from A. arizonica Vasey. The comparatively long callus separates 
it at once from A. tincta Trin. & Rupr. which has a very short one. 
I wish to thank Mrs. Chase for comparing the material with that at 
Washington. 
SpoRoBOLUS cUBENSIS Hitche. Contr. U. S. Nat. Herb. 12: 237 
(1909).— Pine ridge, Yeacos Lagoon, March 5, 1907, M. E. Peck, 
no. 694. A Cuban and Porto Rican species apparently new for Cen- 
tral America. 
