DODDER FAMILY 679 



12. C. salina Engelm. Stem filiform, low; flowers in small clusters; calyx- 

 lobes ovate-lanceolate, as long as the tube of the corolla; corolla 3-5 mm. long; 

 lobes lanceolate; scales fringed, small or reduced; capsule rounded but acute, 

 surrounded but not covered by the marcescent corolla. On Salicornia and other 

 salt plants: B.C. — Utah — Ariz. — Calif. Son. Ap-S. 



13. C. indecora Choisy. Stem fihform, high twining; flowers loosely 

 paniculate-cymose; calyx-lobes ovate or lanceolate, acute; corolla campanulate, 

 3-5 mm. long; lobes ovate-lanceolate, erect or more commonly spreading; scales 

 large, broadly oval, fringed; capsule enveloped by the corolla, rounded-ovoid. 

 On herbs and low shrubs, mostly Compositae and Leguminosae: Fla. — 111. — Utah 

 — Calif.; Mex., C. Am., W. Ind. and S. Am. Jl-S, or in the south Ja-D. 



14. C. megalocarpa Rydb. Stem stout, usually over 1 mm. in diameter; 

 flowers in dense globular clusters; calyx-lobes rounded, scarcely 1 mm. long; 

 corolla about 3 mm. high and broad; lobes broadly triangular, acutish, about 1 

 mm. long, with incurved tip; scales deeply 2-lobed, and fringed only in the open 

 sinuses. On willows: Mont. — Colo. Suhmont. Jl-S. 



15. C. cuspidata Engelm. Stem filiform; flowers in loose panicles, with 

 bracted pedicels; bracts and sepals ovate-orbicular; corolla 3-5 mm. long, cam- 

 panulate; lobes oblong, cuspidate or mucronate, rarely obtuse; scales large, 

 deeply fringed; capsule capped by the marcescent corolla. On Ambrosiaceae 

 and rarely Leguminosae: Mo. — Tex. — Utah. Son. Au-S. 



Family 109. POLEMONIACEAE. Phlox Family. 



Annual or perennial herbs, or rarely shrubby phants. Leaves alternate or 

 opposite, entire, pinnatifid, or pinnately compound. Flowers perfect, regu- 

 lar or nearly so. Sepals 5, partly united. Corolla of 5 united petals, regu- 

 lar or nearly so, 5- or rarely 4-Iobed, from rotate to salver- or trumpet-shaped; 

 lobes convolute in aestivation. Stamens 5, rarely 4, often unequal; fila- 

 inents adnate to the corolla-tube, often inserted at different heights. Gynoe- 

 ciurii of 3 united carpels; ovary S-celled; styles wholly united; stigmas 3. 

 Fruit a 3-celled, loculicidal capsule. Seeds often with a mucilaginous coat. 



Calyx wholly herbaceous; leaves pinnatelv compound. 1. Polemonium. 



Calyx more or less scarious between the lo'bes, or the lobes spinulose-tipped and pungent; 

 leaves simple or pinnatifid, but not compound. 

 Calyx distinctly enlarging in fruit, not ruptiu-ed by the capsule. 2. Collomia. 

 Calyx soon ruptured by the frmt, or if not ruptured, slightly if at all enlarged in 

 fnut and caly.x-teeth spinescent. 

 Corolla strictly salver-shaped with a narrow throat. 



Perennials, with leaves opposite; seeds not mucilaginous when wetted. 



o PhTjOX 



Annuals, with the floral leaves alternate; seeds mucilaginous when wetted. 



^ „ 4. MiCROSTERIS. 



Corolla campanulate, fiumelform, trumpet-shaped, or if somewhat salver-shaped, 

 the throat open. 

 Anthers sagittate at the base; calyx-lobes and 3-5-cleft bracts densely woolly, 



pungent. 5. Wel\vitschl\. 



Anthers not sagittate; calyx-teeth and bracts usually not woolly, but if some- 

 what so, not pungent. 

 Corolla elongate, with a narrow tube and funnelform or spreading throat. 

 Calyx-teeth either unequal In size or spinulose-laciniate, or both; pun- 

 gent-leaved annuals. 6. Navarretia. 

 Calyx-teeth neither imequal nor spinulose-laciniate; perennials or 

 non-pungent annuals. 

 Calyx not at all scariou.s in the sinuses; mostly underslirubs, with 

 pungent leaves. 7. Leptodactylon. 

 Calyx decidedly scarious in the sinuses. 

 Stem leafy; bracts not connate. 



Leaves alternate; seeds mostly with spiracles; corolla with 

 a long tube and a fimnelform 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. Langlolsia. 



Leaves opposite ; seeds without spiracles ; corolla short salver- 

 shaped or short funnelform. 10. Lin.\nthus. 



