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 acuminate, 

 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 Red and Saskatchewan Rivers ; Northern Idaho 

 and Washington Territory. (775.) 



Pentstemon centeanthifolius, Benth. Gray, I. 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 ; thyrse elongated, the peduncles 1-3-flowered, shorter than the 

 pedicels ; sepals broadly ovate ; corolla 1' 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.) Prove Canon, in the Wahsatch ; 

 6,000 feet altitude ; July. (776.) 



Pentstemon CJ3SPIT0SUS, Nutt. Gray, I. c, p, 66. Grrayish-puberulent ; 

 the branches numerous from the base, short (2-6') and crowded, decumbent 

 or ascending, leetfy 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 margined at base ; 

 corolla 6-9" long, blueish-purple, tubular, somewhat dilated above and biplicate, 

 the limb shortly bilabiate with nearly equal, lobes; anthers 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 sohtary flowers 

 of Nuttall's original specimens. (777.) 



Pentstemon CEiSTATUS, Nutt. Gray, I. c, p. Bl. Viscid-pubescent; 

 lower leaves oblanceolate, petioled, upper ones oblong-lanceolate, .sessile, 



