186 POLEMONIACEAE 



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



19. P. Brandegei. 



2. COLLOMIA Nutt. 



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. grandiftora. 

 Corolla 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. tenella. 



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



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



5. C. heterophylla 

 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. Canescentes. 

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

 Leaves glabrous, or merelv cobwebby at the' base, not glandular. 



II. MULTIFIX)HAE. 

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

 Leaves linear to subulate, not with thickened margins. 



III. Caespitosae. 

 Leaves oblong or broadly Unear. with more or less thickened and cartilag- 

 inous margins. IV. AtBOMARGlNATAE. 

 Plants suffrutescent at the base, 3-10 dm. high. VI. Speciosab. 

 Intercostal portion of the calyx replicate. V. Longiflorae. 



I. Canescentes. 

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

 acerose. 

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



1. P. hryoides. 

 Leaves appressed, not conspicuously 4-ranked; corolla-tube slightly if at all exceeding 

 the calyx 2. P. muscoides. 



Leaves subulate, acerose, sparsely arachnoid. 

 Corolla small; its limb 8-10 mm. wide. 



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



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



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



II. MtlLTIFLORAE. 



Plant not glaJidular. 



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



Calyx and the bale's 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 5-10 



cm. high. 6. P. mulHAora. 



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 villous. 8. P. costata. 



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

 CoroUa-lobes 6-8 mm. long. 



Leaves all subulate-filiform. 9. P. scleranthifolia. 



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

 fascicles or branches subulate. 10. P. diffusa. 



Corolla-lobes 4—5 mm. long. 11. P. glahrata. 



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



III. Caespitosae. 



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

 over 1 cm. broad. 

 Leaves almost erect, appressed; corolla-limb about 8 mm. wide. 



13. P. condensata. 

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



Leaves linear, flat; margins only shghtly revolute. 14. P. caesviWsa. 



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



Leaves more than 1 cm. long; plant cespitose. but not pulvinate; coroUa-Umb 12-20 

 mm. wide. 

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



12. P. Douolasii. 

 Leaves linear; margins scarcely revolute; corolla usually pinkish or piu-plish. 



16. P. Kelseyi. 



IV. ALBOMARGtNATAE. 



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

 Unear. 7-20 mm. long. 



