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 filiform, high twining; flowers loosely 

 paniculate-cymoee; 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. Submont. Jl-S. 



16. 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 plants. 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-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 scarious between the lobes, or the lobes spinulose-tipped and pungent; 



leaves simple or pinnatifld, but not compound. 



Calyx distinctly enlarging in fruit, not ruptured by the c?.psule. 2. COLLOMIA. 

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



fruit and calyx-teeth spinescent. 

 Corolla strictly salver-shaped with a narrow throat. 



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



3. PHLOX. 

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



4. MICROSTERIS. 

 Corolla campanulate, funnelform, 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. WELWITSCHIA. 



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 unequal nor spinulose-laciniate; perennials or 



non-pungent annuals. 



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



Leaves opposite; seeds without spiracles; corolla short salver- 

 shaped or short funnelform. 10. LINANTHUS. 



