44 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XI. 
Agave albescens n. sp. 
Plates 53 and 116. 
Agave sp. Brirton, Journ. New York Bot. Gard., vol. 10, p. 108, fig., 1909, in part. 
Acaulescent, not cespitose. Leaves light gray, dull, slightly rough, transiently glaucous 
and banded, oblong-lanceolate, flattish, plicate, 15 by about 45 cm.; spine blackish chestnut, 
dull or even roughened except at the tip, somewhat recurved, conical, shallowly grooved or 
involute below the middle, 4 by 15 mm., very shortly decurrent; prickles about 10 mm. apart, 
2-3 mm. long, usually straight or gently curved, broadly triangular or acuminately deltoid, 
the intervening margin nearly straight. Inflorescence paniculate, 5 m. high; pedicels slender, 
10 mm. long. Flowers 30-35 mm. long, golden; ovary 15 mm. long, shorter than the perianth, - 
fusiform; tube open, 5-6 mm. deep; segments 4 by 12-14 mm., rather shorter than the ovary; 
filaments inserted somewhat below the throat, 35 mm. long, nearly thrice as long as the 
segments. 
Greater Antilles. Southeastern Cuba. 
Specimens examined: CuBA. Guantanamo Bay (Britton, 2085, 1909, the type; Hggers 
4568, flowers). 
Apparently a small species, variable in its leaf characters; differmmg from the few other 
gray-leaved Cuban agaves in the granular roughening of its leaves and the final purplish black 
color of spine and prickles. The flowers, for which I am indebted to Professor Urban, can 
scarcely belong to anything else. 
Agave papyrocarpa n. sp. 
Plates 95 to 97. 
?Furcraea sp. HARSHBERGER, Phytogeogr. Surv. North America, p. 676, 1911. 
Acaulescent, not cespitose. Leaves at first lightly glaucous and rather dull, oblong to 
elongated oblanceolate, gradually acute, somewhat concave, sometimes a little plicate above, 
15 by 75-125 cm.; spine brown, smooth or slightly granular below, somewhat polished toward 
the end, usually a little curved and somewhat conical-awl-shaped, narrowly grooved below the 
middle, 3 by 8-15 mm., not decurrent; prickles 10-25 mm. apart, 1-4 mm. long, straight or 
variously and unequally curved mostly downward, triangular from scarcely or little dilated 
bases, the intervening margin nearly straight or concave on young plants, occasionally with 
one or several minute intercalated prickles. Inflorescence 4 m. high, the upper half or more 
very loosely paniculate, with few slender outcurved branches; pedicels slender, about 10 mm. 
long. Flowers light yellow, about 40 mm. long; ovary 20 mm. long, equaling the perianth, 
fusiform; tube conical, 4 mm. deep; segments 4 by 15 mm., somewhat shorter than the ovary; 
filaments inserted nearly in the throat, 25 mm. long and one-half longer than the segments. 
Capsules globose-oblong, 15-20 by 20-25 mm., not stipitate and little beaked, brown, thin- 
walled; seeds 4-5 by 5-6 mm. 
Greater Antilles. Isla de Pinos. 
Specimens examined: Ista DE Pinos. About Nueva Gerona (Curtiss, 335, Feb..1904, the 
type; Trelease, 20, Mar. 1907). 
Agave Brittoniana n. sp. 
Plates B, 98, and 99. 
Agave’sp. Britton, Journ. New York Bot. Gard., vol. 11, p. 111, 1910. 
Leaves grayish green, very slightly and transiently glaucous, slightly glossy, broadly 
lanceolate, acute or rather abruptly pointed, 20 by 100 cm.; spine brown, dotted with white, 
smooth, somewhat polished, unguiculately curved, subconical or involutely much thickened 
below, openly grooved to the middle or involute, 2-3 by 10-15 mm., more or less decurrent; 
prickles 10-20 or occasionally 25 mm. apart, 2-4 mm. long, variously curved, slender-cusped from 
lenticular or from heavy bases which in the lower third of the leaf may stand on retrorse green 
