404 POLEMONIACEAE (PHLOX FAMILY) 



Corolla funnelform or narrower; filaments not pilose-appendaged at 



base; leaflets more or less verticillate. 

 Corolla purple; flowers capitate. 



Corolla broadly funnelform, less than 2 cm. long . . 7. P. viscosum. 



Corolla narrower, more than 2 cm. long . . . . 8. P. confertum. 



Corolla white, or becoming yellowish or bluish; flowers in dense 



spikes. 



Corolla with broad tube, white or bluish '. . . 9. P. mellitum. 



Corolla with very slender tube, yellow 10. P. Brandegeei. 



1. Polemonium occidentale Greene, Pitt. 2: 75. 1890. Either glabrous or 

 viscid-pubescent; stem strict and virgate, 5-10 dm. high, from running root- 

 stocks, 5-10-leaved: leaflets 15-23, linear-lanceolate to oblong-ovate, 10- 

 20 mm. long: flowers numerous, in a naked and narrow thyrsus or panicle: 

 calyx cleft to or below the middle, with short lanceolate lobes: corolla blue, 

 15-20 mm. in diameter, the obovate lobes much longer than the tube: fila- 

 ments densely bearded at base, often equaling the corolla-lobes: style exserted. 

 P. caeruleum. Boggy or springy places in the mountains; throughout our 

 range and west to the Pacific States. 



2. Polemonium foliosissimum Gray, Syn. Fl. 2 1 : 151. 1878. Rootstock 

 lignescent; stems solitary, pilose at base, glandular upward, simple or branched, 

 leafy throughout: leaflets lanceolate to ovate-lanceolate: flowers corymbose- 

 cymose, smaller: corolla commonly white or cream-color, sometimes violet, 

 10-12 mm. long, twice the length of the calyx: style and stamens not pro- 

 truding: capsule subglobose: seeds oblong, becoming mucilaginous if wetted. 

 In the mountains throughout our range. 



2a. Polemonium foliosissimum robustum (Rydb,) Brand, Polem. 34. 

 1907. Leaves short-petioled : flowers smaller, blue. (P. molle Greene, Leaf- 

 lets 1: 153. 1905; P. robustum Rydb. Bull. Torr. Bot. Club 31: 635. 1904.) 

 Mountains of Colorado and Utah. 



3. Polemonium filicinum Greene, Pitt. 1: 124. 1887. Slender, 5-10 dm. 

 high, glabrous up to the inflorescence which is rather densely glandular- 

 viscid: leaves ovate-oblong in outline, the segments lanceolate, acute, some- 

 what closely ranged and decurrent upon the rachis: inflorescence corymbose- 

 congested: segments of the calyx erect, lanceolate, longer than the tube: 

 corolla deep purple, campanulate, 10-12 mm. broad, the segments ovate, 

 acute: stamens declined and incurved, reaching little beyond midway of the 

 corolla: style exserted: seeds very dark brown, sharply angled. New Mexico. 



3a. Polemonium filicinum Archibaldae (A. Nels.) Brand, 1. c. 37. Usually 

 smaller but with relatively larger and more open inflorescence: corolla-lobes 

 very obtuse: stamens usually declined. (P. Archibaldae A. Nels. Bot. Gaz. 31: 

 397. 1901; P. grande Greene, Leaflets 1. c.) Southern Colorado. 



4. Polemonium pulcherrimum Hook. Bot. Mag. 57: pi. 2979. 1830. Mi- 

 nutely puberulent and viscid-glandular; stems rather slender, sparingly 

 branched, 1-3 dm. high: leaflets 9-21, oblong to lanceolate: flowers in clusters 

 of small cymes, mostly slender-pediceled : calyx narrowly campanulate, cleft 

 to below the middle, 4-5 mm. long: corolla blue with white tube, 10-15 mm. 

 long, the ample oblong lobes much longer than the short tube: filaments pi- 

 lose but not dilated at base: capsule obovoid, much shorter than the calyx: 

 ovules 2-4, and seeds usually 1 in each cell. P. humile pulchellum. In the 

 high mountains of our range. 



4a. Polemonium pulcherrimum parvifolium (Nutt.) A. Nels. Reduced or 

 depauperate forms, usually with fewer leaflets, the flowers on slender pedicels. 

 [P. parvifolium (Nutt.) Rydb. 1. c. 24: 253. 1897; P. delicatum Rydb. 1. c. 

 JS: 29. 1901.] 



5. Polemonium Haydenii A. Nels. Bull. Torr. Bot. Club 26: 353. 1899. 

 Root large, woody, surmounted by a short, woody, branched caudex; stems 

 several, one or more from each crown, 1-3 dm. high, the minute puberulence 

 becoming glandular above: leaves crowded on the crowns, more than half as 

 JoriK as the stems; leaflets 15-25, oval, oblong, or oblanceolate, mostly very 

 small, rarely exceeding 1 cm. in length, glabrous or nearly so: flowers nu- 

 merous and rather crowded, drooping or suberect, on slender pedicels: calyx 



