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 
15200 em.: spine black-chestnut, somewhat glossy, 
finely pitted, slenderly conical, more or less laterally 
curved, very shallow grooved near the base, 315-20 
mm., scarcely decurrent or intruded: teeth similarly col- 
ored, rather glossy above, 30-50 mm. apart, about 3 mm. 
long, mostly upeurved, 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: Guatemana. About El] Rancho 
(Trelease, 11, April, 1915—the type in the herbarium of 
the University of Ilinois; 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. 
pl. 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. 
;y3% Agave Donnell-Smithii n. sp. 
Acaulescent, suckering freely. Leaves light green 
