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' f 



354 Nelson: New Plants from Wyoming 



collected by Dr. F. V. Hayden, on Capt. Raynold's expedition, 

 on Snake River, in Jackson's Hole, Wyo., June 15, 1S60. These 

 are cited as the types. 



Polemonium mellitum 



P. coiifcrtuui mdlituDi Gray, Proc. Acad. Philad. 1 863 : Ji ; 

 Proc. Am. Acad. 7 : 280. 



Tiiis plant is so well known that it does not seem necessary to 

 redraw the description but some of the differences between it and 

 P. coufcrtmn Gray, which seem to entitle it to specific rank, may 

 be pointed out. 



P. mdlitum is larger, more spreading, usually in large clumps, 

 leafy above, the leaves lax, those of the stems nearly equalling the 

 inflorescence ; leaflets larger, thin (almost membranous) ; flowers 

 larger, white or cream white, conspicuously. grecn-bracteate. In 

 strong contrast to this is the strict habit, erect leaves, small, thick, 



crowded leaflets, rather scapose stems and deep blue flowers of P. 

 coiifcrtum. 



P. iiuiiitiiin inhabits sub-alpine stations, its dense tufts clin^'-ino- 



fc>'"i> 



In the crevices of rocky ledges. P. conftrtuiii occurs from 

 alpine to alpine heights, often on open slopes and mostly as single 

 specimens. Though the two may occur together yet in se\'eral 

 collections of each, I have never found them so. 



Pentstemon Crandallii 



Densely cespitose ; the caudex intricately branched; roots 

 numerous, coarsely fibrous, fascicled; stems numerous, 'tufted, 

 ascending or erect, slender, 6-12 cm. long, obscurely grandular- 

 puberulcnt, toward the summit and on the pedicels glandular-pu- 

 berulcnt: leaves dense, glabrous or nearly so, green, slightly 

 wrinkled on the surface when dry, linear, or generally 'narrowly 

 oblanceolate, acute, slender pctioled (sometimes with a broadish 

 base), 15-25 mm. long: bracts similar to the leaves, but much 

 smaller, only 8-10 mm. long : flowers axillary, borne singly or 2-3 

 ma cluster, erect, even the uppermost overtopped by'th'e upper 

 leaves : sepals about 7 mm. long, slightly exceeding the proper 

 tiioe of the corolla, ovate as to the base, long acuminate, basal por- 

 tion scanous margined : corolla about 2 cm. long, tube short not 

 strongly dilated above, the short lobes nearly er^ct, lower lip 

 nearly glabrous within : sterile filament yelhnv -bearded for one- 

 half of its length : anther cells dehiscent through the junction of 

 the two cells, but not cxplanate. 



