34 MEMOIRS NATIONAL ACADEMY OF SCIENCES, VOL. XI. 
Agave Harrisii n. sp. 
Plates 50 and 51. 
Acaulescent, not cespitose. Leaves rather glossy dark green, narrowly lanceolate, gradually 
acute, nearly flat, 15 by 100-125 cm.; spine reddish brown, smooth, glossy, somewhat flexuous 
or recurved, conical, narrowly channeled toward the base, 2 by 10-15 mm., not decurrent; 
prickles 10-20 mm. apart, scarcely 2 mm. long, straight or curved, narrowly triangular, often 
from the tops of mammaeform green prominences, the intervening margin straight or concave. 
Inflorescence paniculate; pedicels 5-10 mm. long. Flowers yellow, 45-50 mm. long; ovary 25 
mm. long, rather exceeding the perianth, fusiform; tube open, 7-8 mm. deep; segments erect, 
4 by 12-15 mm., much shorter than the ovary; filaments inserted near the bottom of the tube, 
30-35 mm. long, about twice as long as the segments. Capsules narrowly oblong, 15-20 by 
45-50 mm., turbinately narrowed rather than stipitate, shortly beaked; seeds 4-5 by 7 mm. 
Bulbils unknown. 
Greater Antilles. Interior of Jamaica. 
Specimens examined: Jamaica. Troy (Britton, 595, 1906; Harris, 1907, 1909, 1911, the 
types). 
The Cockpit Country, where this species occurs, is described by Mr. William Harris, to 
whom it is dedicated, as an elevated ruggedly broken plateau about 2,000 feet above sea level, 
of honey-combed limestone which weathers into a rich red soil, with a temperate climate and 
subject to heavy rainfall (120 inches per year) that is quickly carried away in underground 
streams. Except when cleared for cultivation the land is heavily wooded, and thus in striking 
contrast with the dry coastal limestone hills occupied by A. sobolifera. (See, further, Harsh- 
berger, Phytogeogr. Surv. North America, p. 678, 1911.) ; 
Agave acicularis n. sp. 
Plate 52. 
Leaves slightly grayish, dull, lanceolate, about 12 by 100 cm.; spine gray-brown, smooth, 
slightly glossy, straight, stoutly acicular, subtriangularly grooved below the middle, 4 by 25 
mm., decurrent; prickles chestnut, 10-15 mm. apart, 2-3 mm. long, gently upcurved, below 
the middle becoming more distant (25 mm.), larger (4 mm.), and reflexed occasionally with out- 
curved point, triangular, somewhat lenticular based, the intervening margin slightly concave. 
Scape-bracts narrowly triangular with sharp brown margin; pedicels scarcely 5 mm. long. 
Flowers yellow, 40-45 mm. long; ovary 25 mm. long, exceeding the perianth, fusiform; tube 
open, about 5 mm. deep; segments 4 by 12-15 mm., about half as long as the ovary; filaments 
inserted slightly below the throat, 25 mm. long, about twice as long as the segments. Capsules 
apparently to become subpyriform and little stipitate or beaked; seeds unknown. Bulbils 
unknown. 
Greater Antilles. Central Cuba. 
Specimens examined: Cusa. Rio San Juan. (Britton, Earle, and Wilson, 5926, 1910, the 
type.) 
Agave grisea n. sp. 
Plates 54 to 56. 
Agave sp. Britton, Journ. New York Bot. Gard., vol. 11, 1910, p. 110. 
Acaulescent, not cespitose. Leaves green, transiently glaucous, or gray, rather dull, 
lanceolate, little concave, 10-20 or 25 by 150-200 cmn.; spine reddish chestnut or brown, smooth, 
nearly dull, slightly curved, triquetrously- conical or-somewhat. awl-tapered, flattened or shal- 
lowly concave to or beyond the middle or becoming subinvolute, 4-5 by 10-15 or 20 mm., 
decurrent for its length or more; prickles 15-25 (or exceptionally 45) mm. apart, 2-3 (or even 5) 
mm. long, gently curved, heavily triangular, sometimes wider or sublenticular at base, the 
intervening margin from nearly straight to decidedly concave. Inflorescence 6-8 m. high, 
