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 roimded but acute, 

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

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



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

 paniculate-cj'mose; 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, usual!}' 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 willovv's: Mont. — Colo. Submont. 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, cus])idate or mucronate, rarely obtuse; scales large, 

 deeply fringed; capsule capped by the marcescent coroUa. On Amhrosiaceae 

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



Family 109. POLEMONIACEAE. Phlox Family. 



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

 opposite, entire, pinnatifid, or pinnatel}^ 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-lobed, from rotate to salver- or trumpet-shaped; 

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

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

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

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



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



Calyx more or less scarioiis between the lobes, or the lobes spinulose-tipped and pungent; 

 leaves simple or pinnatifid, but not compomid. 

 Calyx distinctly enlarging in friiit, not ruptured by the capsule. 2. Coli.omia. 

 Calyx soon ruptured by the fruit, or if not ruptm-ed, slightly if at all enlarged in 

 fruit and calyx-teeth spinescent. 

 CoroUa strictly salver-shaped with a narrow tliroat. 



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



.3. Phlox. 

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



4. MICROSTEKIS. 



Corolla campanulate, fimnelform, 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\vifscHiA. 



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 tliroat. 

 Calyx-teeth either unequal in size or spinulose-laciniatc, or both; pun- 

 gent-leaved annuals. G. Navarreti.v. 

 Calyx-teeth neither unequal nor spinulose-laciniate ; lierennials or 

 non-pungent annuals. 

 Calyx not at all scarious in the sinuses; mostly undershrubs, with 

 pimgent leaves. 7. Leptod.\ctylon. 

 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 tlie leaves not changed into bristles; 



calyx-lobes not long-setose. S. Gill\. 



Lower segments of the leaves changed into bristles; 

 calyx-lobes long-setose. 9. Langloisia. 



Leaves opposite ; seeds without spiracles ; corolla short salver- 

 shaped or short funnelform. 10. IjINAxthus. 



