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 throat. 

 Lower segments of the leaves not changed into bristles: 



calyx-lobes not long-setose. 8, Gilia. 



Lower segments of the leaves changed into bristles; 

 calyx-lobes long-setose. 9. L.^ngloisia. 



Leaves opposite; seeds without spiracles ; corolla short salver- 

 shaped or short funnelform. 10. Lin.u^thus. 

 Stem without proper leaves, but with persistent connate cotyle- 

 dons and connate bracts subtending the head-Like flower - 

 clusters. 11. Gymnostbkis. 

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

 open. 

 Corolla carapanulate or short-funuelform. 



Leaves mostly opposite; flowers medium sized; corolla funnelform. 



10. LlNANTHUS. 



Leaves alternate; corolla very small, campanulate. 



12. TlNTINABtJLUM. 



Corolla rotate. 13. Gillvsthttm. 



1. POLEMdNinM (Tourn.) L. Jacob's Ladder, Skunk-weed. 



■Annuals; coroUa almost rotate, shorter than the calyx. I. MiCBANTH.i. 



Perennials; corolla longer than the calyx. 



Corolla campanulate; filaments with pilose appendages at the base; Inflorescence 

 usually open; leaflets never verticillate. 

 Low, 1-3 dm. high, cespitose; basal leaves numerous and stem-leaves few. 



II. PULCHELL.\. 

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



III. Caerulea. 

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



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



IV. VISCOSA. 



I. MICBANTHA. 



One species. 1. P. micranthum. 



II. PULCHELLA. 



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

 ovate-lanceolate. 

 Corolla over I cm. long; plants Ught green; leaflets 1.5-2 cm. long. 



3. P. columbianum. 

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



3. P. delicatum. 

 Stem eind 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 ; inflorescence open. 5. P. pulcherrimum. 



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



III. Cabbulea. 



Upper leaflets decurrent and confluent; plants with a woody base. 



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



Corolla purple. 



Corolla 2 cm. high, 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. moUc. 

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

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



peduncle usually exceeding the brajiches. 10. P. robustum. 



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

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



Upper leaflets not confluent; plant with a creeping rootstock. 



Flowers in a narrow thyrsus; 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-fimuelform, with a rather broad tube. 

 Calyx densely viscid, but not conspicuously long-hairy. 



15. P. viscosum. 

 Calyx conspicuously villous with long white viscid hairs. 



16. P. Grayanum. 

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



Corolla yellow, ochroleucous, or greenish. 



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



18. P. melliium. 



