AGAVES OF THE UNITED STATES. 77 
habit and in never developing a broad pale band down the 
face of the leaf. The group to which all these and a 
number of related forms belong, should receive careful 
study and comparison. Our plant may prove to be a variety. 
+++Leaf with a toothed, horny margin, decurrent for some dis- 
tance below end-spine. — SUBMARGINATAE (Baker). 
A. Uranensts Engelm.— Suberect, compact; leaves 
linear-lanceolate, concave, rigid, fleshy, glaucous, 12 to 17 
em. long, 2 to 2.5 cm. wide, or larger, not contracted above 
the broad base; terminal spine 20 to 35 cm. long, stout, 
channeled, gray, with brown base, slightly decurrent; 
margin sometimes repand; prickles 1.5 to 2 mm. long, 
deltoid above, very minute and close-set below; scape 15 
to 24 dm. high, straight or flexuous; upper 3 to 6 dm. 
floriferous; panicle narrow; bracts very slender; pedicels 
once or twice forked; flowers in 2’s or 4’s, sometimes in 
6’s, 22 to 25 mm. long, yellow, with a very pungent and 
fragrant odor; perianth about as long as ovary, lobes cut 
nearly to its base; filaments inserted a little below the 
middle of the broadly funnel-shaped tube, 15 to 18 mm. 
long; capsules ovoid, cuspidate, 2 to 3 cm. long above the 
stipe, which measures about 4mm.; seeds 4 mm. in great- 
est diameter, marked with flat punctate areoles.— Sereno 
Watson’s Botany of 40th Parallel (1871), 497; Trans. St. 
Louis Acad. iii. 308, Collected Writings, 308; Baker, 
Amaryllideae, 177. A. Haynaldi Tod. var. Utahensis 
Terr. Monogr. 28.— Figured in ‘‘ Garden and Forest,” 
1895, 385.— Along Virgen River in Beaver Dam Mts., 
Utah, as far north as Silver Reef, 4,000 to 6,000 ft. 
altitude; Northern Arizona, south of the Kaibab plateau, 
west to Ivanpah and Resting Springs, California, and east 
to Charleston Mts., Nevada. Abundant throughout North- 
ern Arizona on the Colorado plateau, the rocks in the 
Grand Cafion being covered with the plants.— Plate 32. 
Specimens examined: — Utah; Dr. Palmer, St. George, 
1870, one with leaves very repand, 1877. Arizona; 
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