274 ONAGRACEAE. 



Petals inserted on the throat of the calyx and rather shorter than its erect 

 lobes, obcordate or 2-cleft. Stamens 8, exserted, colored like the corolla; 

 authors linear-oblong, attached by the middle. Style long and exserted; stigma 

 4-lobed. Capsule linear, obtusely 4-angled, 4-valved and imperfectly 4-celled. 

 Seeds oblong, with a tuft of hairs at the apex. (M. Zauschner, a Bohemian 

 botanist, one time Professor of Natural History in the University of Prag.) 



1. Z. calif ornica Presl. Balsa mea. Stems decumbent or erect, about. 1 

 ft. high, woody at base, the herbage more or less villous or woolly; leaves 

 oblong to linear-lanceolate, % to 1% in. long; flowers 1% to 2 in. long; 

 calyx-lobes 4 lines long. 



Dry stream-beds of the Coast Ranges, particularly on benches, or on rocky 

 ridges, slopes, or cliffs. Aug.-Oct. Used as a vulnerary in rural medicine by 

 Spanish-Californians. Var. latifolia Hook. Often nearly glabrous; leaves 

 broadly ovate to ovate-lanceolate, conspicuously feather-veined. — Mt. Diablo 

 range and middle altitudes of the Sierra Nevada. 



4. EPILOBIUM L. Willow Herb. 

 Erect herbs; annual, perennial by creeping rootstocks, or propagating in 

 the autumn by offsets. Leaves opposite or alternate. Flowers purple, rose- 

 color or white, borne in racemes. Petals 4, often emarginate or bifid. Stam- 

 ens 8, the 4 alternate shorter. Stigma oblong or 4-lobed. Ovary long and 

 narrow, 4-celled. Capsule 4-valved. Seeds numerous, the summit bearing a 

 tuft of long hairs (coma). (Greek epi, upon, lobus, a pod, and ion, a violet.) 



Flowers small; petals notched or obcordate, not opening beyond funnelform; .capsule 

 rather prominently ribbed or angled. 

 Perennials; coma mostly persistent. 



Leaves mostly alternate; petals l J / 2 to 2 l / 2 lines long. 



Glabrous below; inflorescence white-pubescent 1. E. calif ornwum. 



Pubescence chiefly glandular 2. E. adenocaulon. 



Silky pubescent throughout 3. E. holosericeum. 



Leaves mainly opposite; petals 3 to 5 lines long. 



Tomentose; flowers exceeding the reduced upper leaves 4. E. zvatsonii. 



Glabrate below, glandular-pubescent above; flowers scarcely surpassing the terminal 



leaves 5. E. franciscanuni. 



Annuals; stems with shreddy bark at base; coma very deciduous. 



More or less pubescent, / 2 to 1 ft. high; petals emarginate 6. E. minutum. 



Glabrous or glandular, l]/ 2 to 5 ft. high; petals deeply 2-cleft 7. E. paniculatutn. 



Flowers large; petals entire, opening nearly flat, 5 to 7 lines long; capsule terete; 

 perennials 8. E. angustifolium. 



1. E. calif ornicum Hausskn. Slender, 3 to 4 ft. high, glabrous below, 

 the inflorescence and buds rather coarsely white-pubescent; leaves lanceolate 

 or oblong-lanceolate, remotely serrulate, 3 to 4 in. long or less, short-petioled ; 

 flowers few; pedicels of mature fruit slender, occasionally equaling the floral 

 leaves; capsule nearly glabrous. 



Fort Boss, Wrangell; common in low ground on the lower Sacramento 

 River. 



2. E. adenocaulon Hausskn. var. occidentale Trelease. Three to 4 ft. 

 high, remotely leafy, finely glandular-pubescent, especially on the strict 

 branches; haves triangular-lanceolate, - in. long or less, denticulate, short - 

 petioled, passing into the small floral ones, these acute at both ends; flowers 

 small; petals 1 to 1 j ■_> lines long; capsule slender, short -podiceled. 



A limit springs in the mountains and moist places in the valleys: Napa Val- 

 ley ; Lake Co.; Suisun Marshes. 



3. E, holosericeum Trelease. Simple below, loosely branched above, 3 to 



