186 POLEMOXIACEAE 



Corolla almost tubular; stamens almost wholly adnate to the corolla-tube. 



19. P. Brandegei. 



2. COLLOMIA Xutt. 



Annuals. 



Leaves entire, rarely denticulate. 



Floral leaves dilated, much broader than the rest: stamens inserted at different 

 heights. 

 Corolla 2 cm. or more long; calyx-lobes broadly triangular-lanceolate, obtusish. 



1. C. orandiflora. 



CoroOa about 1 cm. long; calyx-lobes lanceolate, acute. 2. C. linearis. 



Floral leaves like the stem-leaves, linear; stamens inserted at the same height. 



Calyx-lobes triangular, merely acute. 3. C. tenrlla. 



Calyx-lobes lanceolate, aristate-tipped. 4. C. aristeUa. 



Leaves, at least the lower, pinnately divided; divisions again toothed. 



5. C. hcterophylla 

 Perennials with a cespitose rootstock. 6. C. debilis. 



3. PHLOX L. Phlox. 



Intercostal portion of the calyx not replicate. 



Plants conspicuously cespitose. less than 1.5 dm. high. 



Leaves beset with cobwebby hairs; plants densely pulvinate-cespitose. 



I.. CAXESCEXTE& 



Leaves not cobwebby, except sometimes sUghtly so at the base. 

 Leaves glabrous, or merely cobwebby at the base, not glandular. 



II. MULTIFLORAE. 



Leaves hispid-ciliate on the margin, usually with more or less glandular hairs. 

 Leaves linear to subulate, not with thickened margins. 



III. C.VE.SPITOSAE. 



Leaves oblong or broadly linear, with more or less thickened and cartilag- 

 inous margins. IV. Alboal^rginatae. 

 Plants suffnite.scent at the base. 3-10 dm. high. VI. Speciosae. 

 Intercostal portion of the calyx repUcate. V. Loxgiflorae. 



I. Canescentes. 

 Leaves ovate to lanceolate, densely arachnoid-lanate, mucronate-tipped. but scarcely 

 acerose. 

 Leaves ovate, distinctly 4-ranked, imbiicate; corolla-tube twice as long as the calyx. 



1. P. bryoides. 

 Leaves appressed, not conspicuously 4-ranked ; coroUa-tube slightly if at aU exceeding 

 the calyx 2. P. muscoides. 



Leaves subulate, acerose. sparsely arachnoid. 

 Corolla smaU: its limb S-10 mm. wide. 



Corolla-tube about twice as long as the calyx. 3. P. canescem. 



Corolla-tube slightly if at aU exceeding the calyx. 4. P. Hoodii. 



CoroUa middle-sized, its Umb 10-15 mm. wide. 5. P. andicola 



II. MULTIFLORAE. 



Plant not glandula.r. 



Calyx more than 8 mm. long, its teeth longer than the tube. 



Calyx and the ba.-.es of the leaves arachnoid-hairy. 5. P. andicola. 



Calyx and stem finely villous or glabrous; leaves not arachnoid. 



Calyx more than 1 cm. long; leaves flat, the margins not revolute; stem 6-10 



cm. high. 6. P. wultiftnra. 



Calyx less than 1 cm. long; leaves very narrow, with revolute margins. 

 Stem and calyx glabrous or nearly so. 7. P. depressa. 



Stem and CAlyx decidedly %lIlous. S. P. costata. 



Calyx less than 8 mm. long, its lobes much shorter than the tube. 

 Corolla-lobes 6-8 mm. long. 



Leaves all subulate-flUform. 9. P. scleranthi folia 



Leaves of the stem broader, inclined to be linear-oblanceolate, those of the 

 fascicles or branches subulate. 10. P diflusa. 



CoroUa-lobes 4-5 mm. long. 11. P. qlahrata. 



Plant more or less glandular. 12. P. Douglasii. 



III. Cakspitosae. 



Leaves less than 1 cm. long; plant densely pulvinate-cespitose; Umb of corolla seldom 

 over 1 cm. broad. 

 Leaves almost erect, appressed; coroUa-Umb about 8 mm. wide. 



13. P. condensata. 

 Leaves ascending-spreading; coroUa-Umb about 10 mm. wide. 



Leaves linear, flat; margins only sUghtly revolute. 14. P. caesvitosa. 



Leaves acerose-subulate; margins strongly revolute. 15. P. rigida. 



I-eaves more than 1 cm. long; plant cespitose". but not pul^^nate; coroUa-Umb 12-20 

 mm. ^vide. 

 Leaves acerose-subulate; margins strongly revolute; corolla white. 



12. P. Douolasii 

 Leaves linear; margins scarcely revolute: corolla usually pinkish or purplish. 



10. P. Kelseyi. 



IV. ALBOM.\RGtN.\T.\E. 



Plant cespitose. but not densely pulvLaate, more than 3 cm. high; leaves obiong to broadly 

 hnear, 7-20 mm. long. 



