THE AGAVES OF LOWER CALIFORNIA. 45 
simple slender ascending branches and medium-sized or small yellow 
cup-shaped flowers, usually very short-tubed. Filaments inserted 
nearly in the throat. DESERTICOLAE. 
Leaves triangular or narrowly lance-oblong. 
Prickles close-set, minute. 
Friable, almost without cusps. A, dentiens. 
Firmer, with sharp but short cusps. A, disjuncta, 
Prickles moderately distant and developed. 
Spine nearly straight. Perianth segments about 15 mm. 
Leaves moderately wide with fairly strong spine. 
Margin rather repand: prickles gradually tapered. 
Ovary flask-shaped, short. A, deserti. 
Ovary fusiform, elongated. A. consociata. 
Margin nearly straight: prickles lenticular at base. 
- Ovary fusiform, exceeding the perianth. 
A. Pringlet. 
Leaves narrow with very slender spine: margin mostly 
repand. 
Pedicels racemose. Leaves rough. A. cerulata. 
Pedicels capitate. Leaves smooth. A. carminis. 
Spine? Perianth segments fully 20 mm. long. Leaves 
smooth. A, sobria. 
Spine tortuous. Leaves rough. A, affinis. 
Leaves broadly lanceolate or oblanceolate with rather close-set 
short firm dark prickles. A. Brandegeet. 
Leaves broadly lanceolate or oblanceolate with rather distant 
large firm prickles. 
Prickles moderately wide, little dilated at base. 
Spine at first chestnut, nearly straight. Prickles rela- 
tively short. A. margaritae. 
Spine from dull red becoming ashen. Prickles long, often 
curved like fish-hooks. A. connochaetodon. 
Prickles very wide, often much dilated below. 
Spine tortuous: margin often deeply repand. Perianth 
segments short. A, Roseana. 
Spine nearly straight: margin scarcely repand. Perianth 
segments long. A. avellanidens, 
Leaves oblong to ovate-oblong. Spine conical, straight, round- 
grooved. 
- Prickles long and firm. A, subsimplex. 
Prickles short and friable. A. Nelsoni. 
Acaulescent. Leaves fibrous-fleshy, stiff, straight, dagger-shaped: 
spine strong, grooved below, scarcely decurrent: prickles heavily 
triangular. Scape slender. Panicle narrowly oblong, with green- 
ish tubular flowers. Filaments deep-seated. DATYLIONES. 
Spine grooved at base only. Filaments long. A. Datylio. 
Spine grooved toward the middle. Filaments short. A. vexans. 
