144 Trans. Acad. Sci. of St. Louis. 



ascending, acute, very concave so as to appear oblong, 

 minutely granular on the back and margin, at length 

 15 X 200 cm. : spine black-chestnut, somewhat glossy, 

 finely pitted, slenderly conical, more or less laterally 

 curved, very shallow grooved near the base, 3x15-20 

 mm., scarcely decurrent or intruded : teeth similarly col- 

 ored, rather glossy above, 30-50 mm. apart, about 3 mm. 

 long, mostly upcurved, the often curved or flexed slen- 

 der cusps deltoidally broadened below and often from 

 somewhat raised fleshy bases between which the margin 

 is nearly straight. Inflorescence said to be an open pan- 

 icle of yellowish flowers accompanied or followed by 

 bulbils. 



Specimens examined: Guatemala. About El Rancho 

 (T release, 11, April, 1915 — the type in the herbarium of 

 the University of Illinois; 12, 13). 



Known to me only as planted in hedge-rows or clearly 

 escaped, but said to be spontaneous in the mountains to 

 the north : perhaps really of the endemic alliance. 



Agave sisalana Perrine. 



Agave sisalana Perrine, House Doc. no. 564:8; Senate Doc. no. 300:36. 

 pi. 1-2. 1838. — This species is contrasted with its immediate rela- 

 tives in Mem. Nat. Acad. Sci. 11: 47. 1913. 



Subacaulescent, suckering. Leaves sword-shaped, 

 lightly glaucous becoming green: spine chestnut, pitted, 

 tumidly conical, gently recurved, shallowly round- 

 grooved toward the base, neither decurrent nor intruded 

 into the green tissue : teeth small and slender or typically 

 nearly or quite wanting, the margin nearly straight. 



The Sisal, yaxci or green agave, here called henequen 

 and occasionally planted for its fiber, e. g., Cruz (T re- 

 lease, 14) : originally from Yucatan. 



Agave Donnell-Smithii n. sp. 



Acaulescent, suckering freely. Leaves light green 



