CATALOGUE. 219 
glaucous, 6-18' high ; radical leaves spatulate, the cauline lanceolate, oblong, 
ovate-lanceolate or subcordate, thick and rigid; thyrse elongated, with numer- 
ous flowers ; the peduncles mostly very short or none ; sepals ovate or lanceo- 
late ; corolla 6-10" long, blue or purple, with the anthers and sterile 
filament as in the last; capsule very sharply acuminate. — The specimens, 
collected near Humboldt Lake, Nevada, (May,) are an extreme form ; stems 
stout, 2° high, uppermost leaves broadly cordate and abruptly acuuiinate, 
gradually diminishing to the top of the stem, the numerous flowers sessile 
in their axils ; corollas reddish-purple, scarcely 6" long ; sepals lanceolate, 
acuminate. 390 of Hall & Harbour is an approach to the same form. As 
recognized, the species is exceedingly variable. From Chihuahua and Western 
Texas to Colorado; on the Eed and Saskatchewan Rivers ; Northern Idaho 
and Washington Territory. (775.) 
Pentstemon centeanthifolius, Bcnth. Grat/, /. c.^ p. 63. Glabrous 
and glaucous; stems 1-3° high, slender; leaves entire and fleshy, the lower 
cauline petioled and oblanceolate, the upper sessile and clasping, ovate or 
lanceolate; thja'se elongated, the peduncles 1-3-flowered, shorter than the 
pedicels ; sepals broadly ovate ; corolla V long, scarlet or rarely white, tubu- 
lar and scarcely dilated above, the limb short and equal ; anthers dehiscing 
to the apex and becoming expanded, glabrous ; sterile filament glabrous. 
% — Southern California ; Arizona, (Palmer.) Provo Canon, in the Wahsatch ; 
6,000 feet altitude ; July. (776.) 
Pentstemon c^spitosus, Nutt. Gray, I. c, p, 66. Grayish-puberuleut ; 
the branches numerous from the base, short (2-6') and crowded, decumbent 
or ascending, leafy to the apex ; leaves 3-12/' long, oblanceolate or linear- 
spatulate, acute and submucronate, entire ; peduncles axillary, short, secund, 
usually with 2 leafy bracts and 1-3 flowers ascending upon short pedicels ; 
sepals linear-lanceolate, somewhat broader and scariously niargiiicd at ]>ase; 
corolla 6-9" long, blueish-purple, tubular, somewhat dilated above and biplicate, 
the limb shortly bilabiate with nearly equal lobes; aiillicrs glabrous, the cells 
becoming expanded; sterile filament bearded. — Colorado and Wyoming Ter- 
ritories. Barren hills of Bear River Valley, near Evanston, Utah ; 6,000 
feet altitude ; July. With the short leaves and nearly sessile solitary flowers 
of Nuttall's original specimens, (777.) 
Pentstemon cristatus, Nutt. Gray, I c, 67. Viscid-pn])escent ; 
lower leaves oblanceolate, petioled, U2)per ones ol^long-lanccolat 
