POLEMONIACE^E. (POLEMONIUM FAMILY.) 253 



and crowded, so as seemingly to be verticillate : inflorescence capitate-congested 

 or spiciform. 



1. P. COnfertum, Gray. A span or more high, glandular-pubescent and 

 viscid, musky fragrant : leaflets 1 to 3 lines long, mostly 2 to 3 divided ; the 

 divisions from round-oval to oblong-linear : flowers densely crowded, honey- 

 scented : corolla deep blue, ^ to 1 inch long : ovules about 3 in each cell. 

 Proc. Acad. Philad. 1863, 73. Alpine regions from Colorado to California 

 and northward. 



Var mellitum, Gray. Usually a taller form : inflorescence more lax 

 and leafy, becoming spiciform or racemose : corolla pale or sometimes white, 

 an inch long, more narrowly funuelform. With the type in Wyoming, 

 Colorado, and Utah. 



* * Corolla campanulate-funnelform ; its tube not exceeding the calyx and shorter 

 than the ample limb: filaments usually dilated and pdose-appendaged at base: 

 leaflets simple and entire, sometimes confluent : inflorescence open. 



*- Low, about a span high from cespitose-branching and mostly thickened root- 

 stocks: flowering stems only 1 to 3-leaved : leaflets seldom ^ inch long. 



2. P. viSGOSUm, Nutt. Dwarf and with thick densely tufted rootstocks, 

 viscid -puberulent : leaflets very numerous and crowded or even imbricated, 

 ovate or roundish, at most l lines long : flowers in a rather close cymulose duster : 

 corolla blue or whitish, its lobes about the length of the included tube : filaments 

 not appendaged at base. High summits towards the sources of the Platte, 

 Nuttall. 



3. P. humile, Willd. More slender, and from somewhat creeping root- 

 stocks, more or less viscid-pubescent : leaflets 15 to 21, from round-oval to 

 oblong, 2 to 6 lines long : flowers rather few in the clusters : corolla blue or pur- 

 plish, its ampler lobes much longer than the short included tube: filaments pilose at 

 the dilated base : ovules 2 to 4 and seeds 1 or 2 in each cell. 



Var. pulchellum, Gray. Viscid pubescence mostly minute, or the leaflets 

 often nearly glabrous and naked : flowers smaller : the lobes of the corolla only 

 2 or 3 lines long, violet or lavender blue, in some forms nearly white. 

 Synopt. Fl. ii. 150. P. pulchellum, Bunge. Mountains of Colorado and the 

 Sierra Nevada, northward to the Arctic coast. 



-t- -- Taller, afoot or more high, from slender rootstocks or roots: leaves and leaf- 

 lets larger. 



4. P. CSeruleum, L. Either glabrous or viscid-pubescent: stew mostly strict 

 and virgate, 1 to 3 feet high, 5 to 10-leaued : leaflets from linear-lanceolate to 

 oblong-ovate, 9 to 20 lines long : flowers numerous in a naked and narrow thyr- 

 sus or panicle: corolla blue, an inch or less in diameter: st>/le and stamens 

 usually protruding. From the Colorado mountains to California, and far 

 northward ; very much less abundant in the N. Atlantic States. 



5. P. foliosiSSimum, Gray. Very viscid-pubescent throughout and strong- 

 scented : stem very leaf/ throughout: leaflets from lanceolate to ovate-lanceo- 

 late: flowers con/mbose-C'/nwse, smaller: corolla commonly white or cream-color, 

 sometimes violet, twice the length of the calyx : style and stamens not protrud- 

 ing Synopt. Fl. ii. 151. P. coeruleum, var. foliosissimum, Gray. Mountains 

 of New Mexico, Colorado, Wyoming, and westward. 



