CATALOGUE. 
83 
nearly glabrous above, tomentose-canescent beneath, serrately toothed toward 
the apex, strongly nerved ; flowers solitary or 2-4 together, on slender pedi- 
cels ; calyx-tube becoming ^' in length ; tail of the fruit (4' long) densely 
plumose. — From New Mexico northward to Wyoming Territory and west to 
California. Found in the Wahsatch and Uinta Mountains, but not seen in 
Nevada; 6-7,000 feet altitude ; in flower and fruiting, July. (312.) 
Cercocarpus ledifolius, Nutt. Leaves ^-1^' long, coriaceous, lance- 
olate, entire, nearly veinless with a strong midnerve, margins revolute, usually 
glabrous above and more or less tomentose beneath, somewhat fascicled ; 
flowers 2-6 together, sessile ; calyx-tube becoming 4" long ; tail of the fruit 
very plumose, 3' long, twisted. — An evergreen, with hard heavy dark-col- 
ored wood, and known as ''mountain mahogany;" not usually exceeding 
10-15° in height and 6-12' in diameter, and much resemWing the apjile tree 
in habit, but sometimes becoming a handsome tree 2^° through and 40° or 
more high. It is quite variable in its pubescence and the flowers are very 
rarely 2-carpelled. Nuttall describes the achenium as 2-seeded ; this does 
not appear to be the case. Frequent on mountain-sides through Nevada and 
Utah from the Washoe Mountains to the Wahsatch, CKtending into Idaho and 
California; 6-8,000 feet altitude ; June-September. (313.) 
Cercocarpus breviflorus, Gray. Plant. Wright. 2. 54. Leaves h' 
long, coriaceous, spat«late-oblong or linear by the revolution of the margins, 
entire, sessile, somewhat fascicled, silky-puberulent on both sides or glabrous 
above; flowers sessile, solitary or in pairs, rather small, 2" in diameter; 
calyx becoming 2" long; the plumosely-tailed fruit 1-2' in length. — A very 
diflfuse densely and rigidly branched evergreen shrub, 1-6° high; the leaves 
on these specimens are strongly revolute, shining above, the branchlets almost 
spinose. Collected by Wright near Frontera in New Mexico; now found 
only in the American Fork canon of the Wahsatch Mountains, Utah ; 5,000 
feet altitude. (314.) 
CowANiA^ Mexicana, Don. (C. Stansburiana,Torr. Sfans. Rep., p. 386, 
t. 3.) Leaves 4-7" long, terminating the branchlets, cuneate at base and 
iCOWAXIA, Don. Tube of tlio per-sistont calyx turLiuate; limb 5-lobed, valvate. Petals 5, 
oboTate, spreading, exceeding the calyx. Stamens inimerous, crowded in 2 series, inserted on the mouth 
of the calyx ; filaments for the most part free, j^hort, incurved. Carpels 5-12, sessile, free, villous, 1-celled; 
style short, villous : ovule solitary, ascending. Achenia included iu the calyx and terminated with the 
very long plumose styles. Seed erect; testa membranous; albumen thin; cotyledons oblong; radicle 
inferior. — Much branched shrubs, -with small alternate coriaceous plicate divided leaves, margins revo- 
lute, white-tomentose beneath, and large sessile solitary terminal flovrers. Benth. & Hook. 
