WATERLEAF FAMILY 705 



12. P. corrugata A. Nels. Stem 3-5 dm. high, glandnlar-puberulent, more 

 or less branched; leaves short-petioled or the upper sessile; blades sinuately 

 round-lobed and crenate; branches of the inflorescence long, dense, 5-15 cm. long; 

 sepals linear-oblanceolate, sparingly hirsute; corolla blue or purple, about 1 cm. 

 long; filaments glabrous, twice as long as the corolla. Dry soil: Colo. — Tex. — 

 N.M.— Utah. Son. Ap-Je. 



13. P. crenulata Torr. Stem erect, branched, 2^ dm. high, hispid and 

 somewhat glandular; leaves distinctly petioled, pinnatifid; segments 8-12, 

 oblong to orbicular, the upper confluent, coarsely crenate, densely hirsute; calyx- 

 lobes hnear-oblanceolate, obtuse; corolla deep violet, 6-8 mm. long, its lobes 

 crenulate; filaments glabrous, nearly twice as long as the corolla. Mountains: 

 Ariz.— Utah — Calif. — L. Calif. Son. — Siihniont. Ap-Je. 



14. P. deserta A. Nels. Stem simple, erect, 1-2 dm. high, densely leafy, 

 white-villous with short hairs; leaves petioled, pinnatifid, densely pilose; seg- 

 ments oval, crenate; inflorescence short and dense; sepals lanceolate-oblong; 

 corolla blue, 7 mm. long, with rounded entire lobes; filaments glabrous, about 

 twice as long as the corolla. Dry bluffs: Wyo. Submont. My. 



15. P. splendens Eastw. Stem erect, 2-4 dm. high, branched, purphsh, 

 glandular-puberulent or glabrous; leaves petioled, pinnatifid; divisions often 

 alternate, 7-9, obovate or orbicular, oblique at the base, crenate or round-lobed, 

 glandular-puberulent or nearly glabrous ; inflorescence dense, on a long peduncle ; 

 calyx white-hirsute and somewhat glandular; lobes linear-lanceolate; corolla 

 bright blue, rarely white, about 1 cm. long; filaments glabrous. Desert or dry 

 soil: Colo. — Utah. Submont. My-S. 



16. P. glandulosa Nutt. Stem stout, 3-6 dm. high, leafy, glandular- 

 puberulent; leaves densely glandular-puberulent, pinnatifid, with many oblong 

 to oval divisions, which are coarsely crenate, lobed, or incised ; inflorescence com- 

 pound, of many short branches; sepals glandular, linear or oblanceolate; corolla 

 deep blue or violet, 6-8 mm. long; filaments glabrous. P. Bakeri F. Macbr., in 

 part. Gravelly soil: Mont. — w Tex. — Ariz. Son. — Mont. Je-S. 



17. P. alba Rydb. Stem leafy, 2-A dm. high, strict and simple, viscid-vil- 

 lous and glandular above; leaves twice interruptedly pinnatifid, about 1 dm. 

 long, glandular-puberulent; ultimate segments ovate or oblong, 3-6 mm. long; 

 inflorescence branched, dense; calyx glandular, cleft to near the base; lobes 

 broadly hnear, obtuse; stamens and style much exserted. Valleys: Wyo. — N.M. 

 — Ariz. — Utah. Submont. — Mont. Jl-Au. 



18. P. neomexicana Thurb. Stem 2-6 dm. high, strict, leafy, glandular- 

 pubescent; leaves interruptedly twice pinnatifid; lobes ovate, short; inflorescence 

 dense; calyx-lobes oblong or oblanceolate, glandular-puberulent and hirsute- 

 cihate; corolla bluish or purplish; stamens slightly exserted. Plains: Colo. — 



N.M. Son. — Submont. Je-0. 



19. P. denticulata Osterhout. Stem 1-3 dm. high, pubescent and glandu- 

 lar-viscid; leaves 5-6 cm. long, petioled, oblong in outline, hispid-pubescent on 

 both sides, pinnatifid; inflorescence branched; calyx-lobes linear, obtuse; corolla 

 blue or bluish, 5 mm. long. Glades: Colo. Submont. Je. 



20. P. ramosissima Dougl. Stem often decumbent at the base, 3-6 dm. 

 iigh, diffusely branched, glandular-puberulent, slightly hirsute above; leaves 

 pinnatifid, densely puberulent; segments 5-9, ovate to oblong, dentate or incised; 

 calyx-lobes spatulate, obovate or oblong, at least twice as long as the capsule, 

 •densely pilose and hispid-ciliate; corolla 6-8 mm. long; filaments glabrous. Hills 

 and dry places : Wash. — Ida. — Ariz. — Cahf. Son. Je-Jl. 



21. P. hispida A. Gray. Stem at last diffusely branched, 3-6 dm. high, 

 liispid with long white hairs; leaves pinnatifid, conspicuously hispid; segments 

 7-11, lanceolate or oblong, sharply serrate to incised; calyx-lobes about 5 mm. 

 long, in fruit often 10 mm. long, narrowly linear, hispid-cihate ; corolla 7-10 mm. 

 long, open-campanulate; filaments glabrous. Hills and rocky places; Cahf. — 

 Utah — Ariz. Son. Ap-Je. 



