EVENING- PRIMROSE FAMILY. 



327 



apex. (In memory of M. Zausehner, a Bohemian botanist, one time 

 Professor of Natural History in the University of Prag.) 



1. Z. Californica Presl. Balsamea. 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 \\ in. long, the lowest 

 opposite; flowers \\ to 2 in. long; calyx-lobes 4 lines long. 



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

 also along cliffs in the crevices of rocks. Aug. -Oct. Used as a 

 vulnerary in rural medicine by Spanish-Californians. First collected 

 at Monterey in 1792 by Thaddeus Hamke of the Malaspina Expedi- 

 tion, the first botanist to visit California. An exceedingly variable 

 species. The var. latifolia Hook (Z. latifolia Greene) is often nearly 

 glabrous and has broadly ovate to ovate-lanceolate leaves, conspicu- 

 ously feather-veined. — Mt. Diablo range and middle altitudes of the 

 Sierra Nevada. 



4. EPILOBIUM L. Willow Herb. 

 Erect herbs; annual, perennial by creeping root-stocks, or propa- 

 gating in the autumn by offsets. Leaves opposite or alternate. 

 Flowers purple, rose-color or white. Petals 4, often emarginate or 

 bifid. Stamens 8, the 4 alternate shorter. Stigma oblong or 4-lobed. 

 Ovary long and narrow, 4-celled. Capsule 4-valved. Seeds numer- 

 ous, 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 funnel- 

 form (except no. 7?); capsule rather prominently ribbed or angled. 

 Perennials; coma mostly persistent. 

 Leaves mostly alternate; petals 1% to 2% lines long. 

 Glabrous below; inflorescence white-pubescent . .I.E. Californicum. 

 Pubescence chiefly glandular: var. occulentale of. . 2. E. adtnocaulon. 



Silky pubescent throughout 3. E. holozcricuim. 



Leaves mainly opposite; petals 3 to 5 lines long. 



Tomentose; flowers exceeding the reduced upper leaves 



4. E. Watsoni. 



Glabrate below, glandular-pubescent above; flowers scarcely surpass- 

 ing the terminal leaves 5. E. Erahciscanum. 



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

 More or less pubescent, % to 1 ft. high; petals emarginate 



6. E. minutum. 



Glabrous or glandular, 1% to 5 ft. high; petals deeply 2-cleft 



7. E. paniculatum. 



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

 terete; perennials 8. E. spicatum. 



1. E. Californicum Hausskn. Glabrous below, the inflorescence 

 and buds rather coarsely white-pubescent, slender, 3 to 4 ft. high; 

 leaves lanceolate or oblong-lanceolate, remotely serrulate, 3 to 4 in. 

 long or less, short-pe tided; flowers few; peduncles of mature fruit 

 slender, occasionally equaling the floral leaves; capsules nearly 

 glabn >U8. 



First collected near Fort Koss by "VVrangell; common in low ground 

 on the Lower Sacramento. 



2. E. adenocaulon Hausskn. var. occidentale Trelease. Finely 

 glandular-pubescent, especially on the strict branches, 3 to 4 ft. high, 



