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AGAVES OF THE UNITED STATES. 79 
paniculate character, that it might be placed in the Euagave 
section with almost as great propriety as in that of Littaea. 
The flowers seem identical with those of A. Utahensis. I 
subjoin a description, that the plant may be looked for. 
A. Newberryi Engelm.— Leaves rigid, ensiform, about 20 cm. long, 2 
cm. wide; end-spine dark-colored, 12 mm. long, grooved (Engelm.); mar- 
gin probably entire; scape 24 dm. high, with lanceolate bracts 12 mm. 
long, and a loose elongated sub-paniculate inflorescence; contracted 
branches 8 mm. apart, 12 mm. long; perianth nearly equal to Ovary; tube 
short, broad; stamens inserted near the base of tube, short.—1. c.; 
Baker, Amaryllideae, 186; Terr. Monogr. 36. — Peach Springs, North- 
west Arizona, Dr. J. S. Newberry, March, 1848, altitude 4,000 feet. 
* * x Mostly acaulescent in our species, root stocks and roots as in last 
group; leaves rosulate, marked with impressions of adjoining leaves, 
sometimes a little turned to one side, stout, fleshy, fibrous, persistent, 
With stout, horny end-spines; inflorescence paniculate, with clusters 
of flowers at ends of branches.—EvuaGave (Baker). Paniculatae 
(Engelm.); Cladagave, Paniculiflorae (Terr.). 
+ Leaf with a horny margin which usually includes at least the upper teeth, 
and sometimes extends nearly or quite to base. — SUBMARGINATAE 
(Baker). 
++ Stamens inserted in upper part of tube. 
= Leaves very thick, fleshy, spreading. California. 
A, DESERTI Engelm.—Leaves densely clustered, upper 
ones ascending, lower ones spreading, narrowed at a consid- 
erable distance above the base, broadest above the middle, 
and slenderly acuminate at apex, 30 to 50 cm. long, 5.5 
to 6.5 cm. wide; end-spine 3 to 4 cm. long, slender, chan- 
neled, grayish with brown tip, very shortly decurrent; 
teeth stout, gray, 12 to 20 mm. apart, 3 to 4 mm. long, 
lanceolate-deltoid and recurved above, and minute, close- 
set, and turned upward below; scape 12 to 30 or even 60 
dm. high; bracts close-set below, large, triangular, acumi- 
nate, clasping, appressed, dentate, and terminating in a 
slender black spine 12 to 18 mm. long; branches trans- 
versely flattened; flowers 50 to 55 mm. long; perianth 
yellow, about same length as ovary; segments oblong; 
filaments inserted at base of segments, and twice their 
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