NO. 2 GENTRY : LAND PLANTS 49 



CATALOGUE OF COLLECTIONS 



Gnetaceae 



Ephedra aspera Engelm. ex Wats., Proc. Am. Acad. Scl. 18:157. 

 1883. 



Ephedra peninsularis Jtn., U. C. Publ. Bot. 7:437. 1922. 



East side of Cedros Island, July 10, 1937, Rempel 340, alluvial fan. 



Widely distributed in the southwestern United States and northern 

 Mexico; type apparently from Frontera, Texas. Rempel's collection is 

 sterile and not certainly determinable, but aspera is the only species 

 known from Cedros Island. Hale, (1941:56) reports that the plants 

 are broad and bushy, scarcely exceeding a foot in stature. 



Gramineae 



Aristida adscensionis L., Sp. PI. 82. 1753. 



Cannery Bay on east side of Cedros Island, March 14, Elmore A 6, 

 in dry wash. 



A xerophytic grass commonly scattered throughout southwestern 

 United States and southward into Mexico ; also in warmer parts of the 

 Old World. The collection is a single depauperate plant, but it adds 

 another species to the published flora of the island. 



Amaryllidaceae 



Agave Shawii Engelm., Trans. Acad. St. Louis 3:314. 1875. 



West San Benito Island, July 14, 15, 1937, Rempel 364 (sterile), 

 on southerly exposures with wind appearing to prevail from north. 



Typical A. Shawii is abundant from San Diego, California south to 

 Rosario in northwestern Baja California, where it commonly forms 

 dense stands along the slopes facing the moist sea air. The type was 

 described from Point Loma near San Diego. The short ovate-lanceolate 

 blades with strong crooked, closely set, marginal prickles of the San 

 Benito plant pretty certainly align it with the peninsular plant. 



Agave Shawii Engelm., var. sebastiana (Greene) Gentry new comb. 



Agave sebastiana Greene, Bull. Calif. Acad. Sci. 1:214. 1885. 



East side of Cedros Island, July 10, Rempel 330, general. 



The variety is known certainly only from Cedros Island. Greene 

 first collected and described it as a distinct species. Trelease (C.N.H. 

 23:110, 124. 1920) maintains A. Shawii and A. sebastiana as distinct 

 species, separating them in his key on the basis of sinuous (Shawii) or 

 straight (sebastiana) terminal spine. The sebastiana population appears 



