POLYPETALOUS EXOGENOUS PLANTS. 191 



back, l-few-seeded. Seed-co3it loose and separating. Leaves 

 3-foliata Leaflets obcordate. 



0. viOLACEA, L. {Purple Wild Sorrel) Stemless; 

 root tuberous; scapes umbellately 4-6-flowered; flowers 

 purple, nodding. Scapes and petioles 5-9' high. 



0. ACETOCELLA, L. (White Wood-Sorrel) Stemless; 

 root creeping, scape 1-flowered. Floivers white, veined 

 with red; Scape and petiole hairy. 



0. STRiCTA. {Yelloiu W-S.) Branching steuh lea^fy; 

 axiDary peduncles, 2-6-flowei'ed, longer than the leaves; 

 jioicers yellow. Capsule elongated, erect; annual and 

 perennial. 



0. VESPERTiLiONis. Stemless ; bulb solitary, scaly. 

 Leaves 3-foliate, and with the whole plant glabrous. 

 Leaflets dilated, broadly cuneate at the base, 2-lobed ; scape 

 5-8-flowered, longer than the leaves. Sejmis linear-oblong, 

 with 3-4 glands at the top ; petals violet, narrowly oblong, 

 entire.— Driimmo7id. 



L. RIGID UM. Leaves erect, linear, rigid, acute. Floivers 

 racemed on the corymbous branches. Stem angular. Se- 

 pals 3-veined, ovate-lanceolate, acuminate, with glandular 

 fringed serrated bracts, longer than the globous capsule. 

 Styles more or less united at the base. Stems 10-16' high. 

 Leaves 4"-8" long, scabrous on the margins. Floioers 

 yellow, 8" diameter. — Torry. 



L. Berlandiere. Cache Creek. — Marcy. 



L. BooTTii. Wichita Mountains. — Marcy, 



31. GERANIUM FAMILY. Order, Geraniace^. 



Herhs or shrubs, swollen, separate joints. Leaves stipu- 

 late, palmately veined. Flowers symmetrical, hypogynous, 

 pentamerous. Sepals imbricated; petals convolute in 

 aestivation; stamens 10, monadelphous, the alternate ones 

 often abortive. Pistils 5 grown into one, cohering to an. 



