Trelease—The Agaveae of Guatemala. 135 
““S® Agave tortispina n. sp. 
Acaulescent, not cespitose. Leaves white-glaucous on 
a yellow-green ground, more or less transversely 
banded, forming a close rosette, broadly oblanceolate- 
spatulate, subacuminate, somewhat concave, slightly 
granular beneath, 1025-30 em.: spine red-brown be- 
coming smoky, glossy, slightly granular below, very tor- 
tuous, very openly grooved from above the middle with 
acute edges, ventrally and dorsally keeled, decurrent for 
searcely its own length, somewhat intruded into the 
green tissue on both faces, 4x30 mm.: teeth similarly 
colored, 15-25 mm. apart, 3-5 mm. long, nearly straight, 
broadly triangular, rather gradually dilated into the tops 
of high green prominences between which the margin is 
nearly straight, or which are separated by acute sinuses. 
Inflorescence, flowers and fruit unknown. 
Specimens examined: Guaremata. Cruz, between El 
Rancho and Sanarate (T'release, 1, March, 1915—the 
type in the herbarium of the University of Illinois). 
‘0 Agave pachycentra n. sp. 
Acaulescent, little suckering. Leaves very blue-glau- 
cous on a deep green ground, ascending in a close rosette, 
broadly oblong-oblanceolate, acute, concave, minutely 
granular beneath, 15-20 35-60 em.: spine drab or gray- 
ing, dull or slightly glossy, more or less granular, stoutly 
half-conical or triquetrous, somewhat wavy, very openly 
grooved from near the end with acute edges, usually ven- 
trally and dorsally keeled, decurrent for about its own 
length, more or less intruded into the green tissue on 
both faces, 8><50-60 mm.: teeth similarly colored, rather 
dull, mostly 25-40 or 50 mm. apart, 5-10 mm. long, more 
or less curved, especially downward, heavily triangular, 
abruptly dilated into fleshy prominences or frequently 
shouldered at base, the intervening margin somewhat 
concave. Inflorescence, flowers and fruit unknown. 
