404 POLteMONIACEAE (PHLOX ITAMILY) 



Cbi-oUa fiinnelform or narrower; filaments not pilose-appendaged at . ' ' 



1,^1 base; leaflets more or less verticillate, , . ' , 



Corolla purple; flowers capitate. 



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



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

 Corolla white, or becoming yellowish or' bluish; flowers iti- dense 

 ; ;,; spikes. I , ,, 



Corolla with brtad tube, white 6t bluish .... 9. P. toellittim; I ■ ' 

 Corolla with very slender tube, yellow . , . > . .10. P. Brandegeeii- j , 



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

 viscid-pubesCent; stem strict arid virgate, 5-10 dm. higii, from runriing root- 

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

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

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

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

 ments deiisely.bea;rdfed at base, ofteii equkling the corolla-lobes: style exserted. 

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

 range and west to the Pacific States. ' 



2. Polemonitun foliosissimum Gray, Syn. FL 2': 151: 1878. Roofstocb 

 lignescent; stems solitary, piloseatbase, glandular upward, simple or br^ficjied, 

 leafy throughout: leaflets lanceolate to ovate-lanceolate; flowers cprymfiose- 

 eymose, 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 mucilagiaousif wetted.— 

 In the mouritairis throughout our range. „ i , , 



.2a. Poleinonium foliosissiilium robustum , (Rydb.) Brand, Polem. 34. 

 1907. Leaves short-petioled:, flowers smaller, blue. (P. jjioHe i Greene,, Leaf^ 

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

 Mountains of Colorado and Utah. ! 



•i3. 'Polemonium fllicinimi Greene, Pitt. 1: 124. 1887. Slender, 5-10 dm. 

 highr'ifelabrous up ito the < inflorescence which is rather densely; glandular- 

 viscid: leaives ovate-obloilg. in outline, the segments lanceolate, acute, some- 

 what closely ranged and ideourreiit upon the rachis: infloj-escenc^ corymbose- 

 congested: segments! of) the calyx erect, lanceolate, longer tih^n, the tube: 

 corolla 'deep purple, campanulalte, 10-12 mm;, broad, the segments ovate, 

 acute: stamens declined and incurved, reaching littla beypndmidway of the 

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



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

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

 very obtuse: stamens usually dechned. (PT Archibaldae A. Nels. Bot. Gaz. 31: 

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



4i Polemonium pulcherrilnum Hook. Bot., Magi 57: pL 2979. 18301,] Mi,- 

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

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

 of small cymes, mostly slender^peldioeled: calyx narrowly campanulate, cleft 

 to belowthe middle, 4-5 mim. long: corolla blue with white tube, 10-15 inm. 

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

 lose but not dilated at b,ase: capsule pbovoid, much shorter than the calyx: 

 ovules 2-4, and seeds' usually" 1 in each cell. P. huWdle' pulchdlum.— In the 

 high mountains of our range. . ' 



4o. Polemonium p.ulcherrimum iparvifoliimi (Nutt.) A. .Nels., Reduced or 

 depauperate forms, uS'uSlly With fewer leaflets, the flowers on slender pedicels. 

 [P. parvifolium (NuttO Rydb. 1. c. 24: 253. 1897; P. ddicaium Rydb. 1. e. 

 28« 29. 1901.} ... 



5j, Polemonium Haydenii A. Nels. Bull. Tprr. Bot. Club 26: 853. 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 

 long,ias the stems; leaflets, 15-25, ,oval,.,o,ljlong, or oblanceolate, mostly very 

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

 rilferous and' rattier crowded, drooping or suberect, on islender pedicela: calyx 



