POLEMONIACE^E. (POLEMCHSTIUM 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, honev- 

 sceuted : 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 funnelform. — 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 pilose-appendaged at base : 

 leaflets simple and entire, sometimes confluent: inflorescence open. _, 



4- Low, about a span high from cespitose-branching and most.li/ thim cark, root- 

 stocks : flowering stems only 1 to S-leaved : leaflets seldom J iw acrGjjj, 



2. P. viseosum, Nutt. Dwarf and with thick densely tuftet.rootstocks, 

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

 ovate or roundish, at most 1 \ lines long : flowers in a rather close cymuiose cluster : 

 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, 

 Nuttidl. 



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. pu.lcliellu.rri, Gray. Viscid pubescence mostly minute, or the leaflet/: 

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

 lets larger. 



4. P. OSeruleum, L. Either glabrous or viscid-pubescent: stem mostly strict 

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

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

 sus or panicle: corolla blue, an inch or less in diameter: style and- stamens 

 nsuatti) 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 leafy throughout: leaflets from lanceolate to ovate-lanceo- 

 late: flowers cori/mbose-cymose, 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. caruleum, var. foliosissimum, Gray. Mountains 

 of New Mexico, Colorado, Wyoming, and westward. 



