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 Saliconiia 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 cami)anulate, 

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

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

 On herbs and low shrubs, mostly Composilue and Leguminosae: Fla.— IIL— Utah 

 — Cahf.; 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 m the open 

 sinuses. On willows: Mont. — Colo. Submoni. 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 

 ana 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 rarclv 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. GjTioe- 

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

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



Caivx wholly herbaceous; leaves pinnately compound. . 1. P^^^JP^T-^^'Ar^f - 



CaJvx more or less scarious between the lobes, or the lobes spmulose-tipped and pungent . 



leaves simple or pmnatifid, but not compound. ri^rTr^^rri 



r-ilvx distinctly enlarging in fruit, not ruptured b^" the capsule. 2. COLI.omia. 

 cilyx soon ruptured by the fruit, or if not ruptured, slightly if at aU enlarged m 



fruit and calyx-teeth spinescent. 

 Corolla strictly salver-shaped with a narrow throat. _ ,^ottr^ 



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



Annuals, with the floral leaves alternate; seeds mucilaginous ^w^i^^we^ted. 

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

 Anth'e^^StXai the base; calyx-lobes and 3-5-cleft tracts denselyj«>oUy, . 



pungent. 



5. WELWITSCHIA. 



calyx-teeth and bracts nsuaUy not wooUy, but if some- 



OopoUa^elong^^^^^ tube and funnelform or spreading throat. 



Calvx-teeth eitlier unequal in size or spinulose-lacimate, or both; pun- 

 gent-leaved annuals. . ^ ^ . 6 Navarretia. 

 Calyx-teeth neither tuiequal nor spmulose-lacmiate; perennials or 



non-pungent annuals. ^ i, v, _j+i, 



Oalvx not at aU scarious in the sinuses; mostly undershrubs. with 

 pungent leaves. 7. Leptodactylon. 



Calyx decidedly scarious in the sinuses. 



Stem leafy; bracts not coimate. , . ^ . , ,. .+>, 



Leaves alternate; seeds mostly with spiracles; coroUa with 



a long tube and a funnelform throat. . 



Lower segments of the leaves not changed mto bristles; 



calyx-lobes not long-setose. 8. GiLf\- . . ., 



Lower segments of the leaves changed mto bristles, 

 calyx-lobes long-setose. 9. Langia:)ISL\. 



Leaves opposite; seeds without spiracles; corolla short salver- 

 chanfid or short funnelform. 10. Linanthus. 



