694 POLEMONIACEAE 



the tube; corolla 5-6 mm. long, white; lobes oval, 2 mm. long. Sandy places: 

 e Colo.- — Utah — Ariz. Son. My-Je. 



15. G. depressa M. E. Jones. Stem erect, divaricately branched, 5-10 cm. 

 high, crisp-pubescent; leaves entire or with a few teeth above the middle; flowers 

 CJ^nose, more or less clustered towards the ends; bracts oblanceolate, acute; 

 calyx campanulate; teeth subulate, equalling the tube; corolla 6 mm. long, white; 

 lobes 1.5 mm. long, oval, acute. Desert regions: Utah — Ariz. — Calif. Son. 

 My-Je. 



16. G. pumila Nutt. Stem erect, branched, 1-2 dm. high, crisp-hairy; 

 leaves pinnatififl, with few hnear divisions, cuspidate, sparingly crisp-hairy; 

 flowers in small terminal heads; calyx-lobes subulate, shorter than the tube, 

 cuspidate; corolla 9-10 mm. long; tube twice as long as the calyx; lobes oval, 2 

 mm. long. Dry hills: w Tex.^ — -Wyo. — Utah — Ariz. Son. — Submont. My-Au. 



17. G. polycladon Torr. Stems ascending or erect, branched at the base, 

 5-10 cm. high; leaves mostly basal, rosulate, pinnatifid, crisp-hairy, with oblong 

 divisions, cuspidate; stem-leaves few or none; flowers in small terminal heads; 

 bracts 3-cleft at the apex; calyx glandular-puberulent; sepals lanceolate, cuspi- 

 date, shorter than the tube; corolla white, 4-5 mm. long, exserted; lobes scarcely 

 1 mm. long. Desert regions: w Tex. — -Colo. — -Nev. — Ariz. Son. Ap-Je. 



18. G. capitata Dougl. Stem erect, simple, or virgately branched, gla- 

 brate or nearly so, 1.5-6 dm. high; leaves glabrous or arachnoid at their bases, 

 bi- or tri-pinnatifid, with linear segments; flowers capitate at the ends of the 

 branches; calyx glabrous or slightly puberulent; teeth subulate, equalling the 

 tube; corolla light blue or white, short-trumpet-shaped, nearly funnelform; lobes 

 linear or oblong, equalling the tube. Hills and plains: Alaska — Ida. — Calif. 

 Son. — Submont. My-Jl. 



19. G. arizonica (Greene) Rydb. Stem 2-4 dm. high, more or less crisp- 

 hairy and glandular-puberulent; leaves crisp-hairy, pinnatifid, with rather ap- 

 proximate linear lobes, obovate in outline; calyx-teeth deltoid-lanceolate, grada 

 ally cuspidate; corolla 2.5-3 cm. long. Callisteris arizonica Greene. Dry regions 

 Ariz. — s Utah. Son. Je. 



20. G. tenuituba Rydb. Stem about 3 dm. high, glandular-puberulent 

 leaves pinnatifid into linear, puberulent, cuspidate divisions; calyx glandular 

 puberulent, scarious in the sinuses; corolla flesh-colored, 4 cm. long; tube 1 mm, 

 thick below, 2 mm. at the throat; lobes 1 cm. long. Dry soil: s Utah. Son. 



21. G. aggregata (Pursh) Spreng. Stem erect, 3-5 dm. high, more or less 

 puberulent, simple up to the inflorescence; leaves pinnatifid into narrowly linear 

 divisions, more or less crisp-hairy; calyx-lobes lanceolate, attenuate, spinulose- 

 tipped; corolla 3-4 cm. long, crimson to white; lobes 7-9 mm. long, lanceolate. 

 Callisteris aggregata and C.flcivida Greene. Skyrocket. Hills, glades, and mead- 

 ows: Mont.— N.M.—Cahf.— B.C. Submont.— Mont. My-Au. 



22. G. pulchella Dougl. Stem erect, simple up to the inflorescence, more 

 or less crisp-hairy as well as glandvilar-puberulent, 3-6 dm. high; leaves pinnatifid 

 into Hnear divisions, crisp-hairy; calyx-lobes narrowly lanceolate, attenuate, 

 with spinulose spreading tips; corolla crimson to white, 3-4 cm. long; lobes 

 lanceolate, attenuate-acuminate. G. aggregata attenuata A. Gray. G. attenuata 

 A. Nels. and Callisteris attenuata Greene, the white-flowered form. Skyrocket. 

 Open hills and plains: Mont. — Colo. — Nev. — Wash. Submont. — Mont. My- 

 Au. 



23. G. scariosa Rydb. Stems simple, strict, 3-6 dm. high, glandular- 

 puberulent throughout; leaves pinnatifid into linear-filiform spinulose-tipped 

 divisions, more or less white-villous when young, glandular-puberulent; calyx- 

 tube about 6 mm. long, puberulent; teeth short, broadly rounded-ovate, abruptlj' 

 subulate-acuminate; corolla pink, .3-4 cm. long; lobes acute, about 8 mm. long. 

 Callisteris collina Greene. Open hills: Colo. — Utah. Submont. — Mont. Jl-S. 



24. G. Candida Rydb. Biennial or perennial; stems ascending or erect, 

 simple, 4-6 dm. high, leafy; leaves rather fleshy, divided into linear-filiform, 

 spinulose-tipped segments; calyx glandular-pubescent, about 8 mm. long; lobes 



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