PHLOX FAMILY 185 



Calyx decidedly scarious in the sinuses. 

 Stem leafy; bracts not connate. 



Leaves alternate; seeds mostly with spiracles; corolla with 

 a long tube and a funnelform tliroat. 

 Lower segments of the leaves not changed into bristles: 



caly.x-lobes not long-setose. 8. Gilia. 



Lower segments of the leaves changed into bristles; 

 caly.x-lobes long-setose. 9. Langloisia. 



Leaves opposite ; seeds without spiracles ; corolla short salver- 

 shaped or short fumielform. 10. Linanthus. 

 Stem without proper leaves, but with persistent connate cotyle- 

 dons and connate bracts subtending the head-like flower - 

 clu-sters. 11. Gymxosteris. 

 Corolla rotate, or campanulate, with very short proper tube, and rather 

 open. 

 Corolla campanulate or short-funnelform. 



Leaves mostly opposite; flowers medium sized; corolla funnelform. 



10. Linanthus. 

 Leaves alternate: corolla very small, campanulate. 



12. Tintinabulum. 

 Corolla rotate. 13. Gili.vstrum. 



1. POLEMONIUM (Tourn.) L. Jacob's L.adder, Skunk-weed. 



Annuals; corolla almost rotate, shorter than the caly.x. I. Micrantha. 



Perennials; corolla longer than the calyx. 



CoroUa campanulate; filaments with pilose appendages at the base; inflorescence 

 usually open ; leaflets never verticillate. 

 Low, l-3"dm. high, cespitose; basal leaves numerous and stem-leaves few. 



II. PULCHELLA. 



stem tall, leafy, usually solitary from the rootstock, 4-10 dm. high. 



III. C.\ERULEA. 



Corolla funnelform to trumpet-shaped; filaments without appendages at the base; 

 inflorescence dense, spiciform; leaflets (except in the flrst species) verticillate. - 



IV. VISCOSA. 



I. MlCR-iNTHA. 



One species. 1. P. micranthum. 



II. PULCHELLA. 



stem and leaves viscid-pubescent, with long flat hairs; leaflets incUned to be ovate or 

 ovate-lanceolate. 

 Corolla over 1 cm. long; plants light green; leaflets 1..5-2 cm. long. 



2. P. columbianum. 

 Corolla less than 1 cm. long; plant dark green; leaflets .5-15 mm. long. 



3. P. delicatum. 

 Stem and leaves viscid-puberulent, the latter often glabrate. 



Inflorescence and leaflets crowded; sepals obtuse or rounded at the apex. 



4. P. parvifolium. 

 Inflorescence and leaflets scarcely crowded; sepals acutish. 



Stem-leaves 1-3; uiflorescence open. 5. P. pulcherrimum. 



Stem-leaves 3-5; inflorescence narrow. 6. P. Haydeni. 



III. C.^ERULEA. 



Upper leaflets decurrent and confluent; plants \vith a woody base. 



Corolla straw-colored or white. 7. P. albiflorum. 



Corolla purple. 



Corolla 2 cm. liigh, or nearly so; leaves glabrous. 8. P. Archibaldae. 



Corolla 8-15 mm. high; leaves pubescent. 



Stem and inflorescence long-villous, scarcely at all viscid. 



9. P. mollc. 

 Stem and inflorescence short-hairy; the latter at least distinctly viscid. 

 Corolla over 12 mm. long; inflorescence conical or ovoid in outline: main 



pedmicle usually exceedmg the branches. 10. P. robustum. 



Corolla less than 12 mm. long; inflorescence flat-topped; main peduncle 

 exceeded in length by the branches. 11. P. foliosissinium. 



Upper leaflets not confluent; plant with a creeping rootstock. 



Flowers in a narrow thjTsus; leaflets usually less than 3 cm. long. 



12. P. occidentale. 

 Flowers in an open corymbiform or paniculate inflorescence; leaflets 3-5 cm. long. 



13. P. intermedium. 



IV. ViSCOSA. 



Corolla purple. 



Leaflets not verticillate. 14. P. speciosum. 



Leaflets more or less verticillate. 



Corolla 2 cm. long or less, campanulate-funnelform. with a rather broad tube. 

 Calyx densely viscid, but not conspicuously long-hairy. 



15. P. viscosum. 

 Calyx conspicuously villous with long wliite viscid hairs. 



16. P. Grayanum. 

 Corolla 2-3 cm. long, funnelform, with a narrow tube. 17. P. confertum. 



Corolla yellow, ochroleucous, or greenish. 



Corolla funnelform; stamens adnate to the middle of the corolla-tube. 



IS. P. mcllilum. 



