170 ONAGRACEAE 



Moxley, Bull. S. Calif. Acad. IS: 22. 1916; Z. Hallii Moxley, S.W. Sci. Bull. 1: 27. 1920; Z. orbiculata 

 Moxley, Bull. S. Calif. Acad. 19: 50. 1920; Z. elegans. Eastw. ex Moxley, S.W. Sci. Bull. 1: 26. 1920.) 

 Lower plants, 1-3 dm. tall, often much branched and with the branches at right angles to the stem, viscid and 

 glandular. Leaves from broadly ovate and with round base to nearly elliptical, crowded on stem. On exposed 

 ridges at higher altitudes, Upper Transition and Canadian Zones; southern Sierra Nevada to the San Gabriel 

 and San Jacinto Mountains, California. Type locality: Barley Flats, San Gabriel Mountains, Los Angeles 

 County. 



Zauschneria latifolia var. Johnstonii M. Hilend, Amer. Journ. Bot. 16: 67. 1929. Plants usually over 

 3 dm. tall, coarse, very leafy, villous, often glandular and clammy. Leaves broadly lanceolate to elliptical, not 

 crowded on stem, mostly opposite. Dry slopes, mountains of southern California, at an elevation of 3,500-6,500 

 feet. Type locality : San Jacinto Mountains. 



4. Zauschneria septentrionlilis Keck. Northern California Fuchsia. Fig. 3358. 



Zauschneria septentrionalis Keck, Carnegie Inst. Wash. Pub. No. 520: 219. 1940. 



Herbaceous perennial with matted stems 1-2 dm. high. Leaves broadly lanceolate to oval, 

 4-8 mm. wide, 10-25 mm. long, entire or sometimes obscurely denticulate, white-canescent 

 below, sometimes greenish and villous above; flowers 28-32 mm. long; capsules as in Z. cali- 

 jornica. 



Rocky ledges, Transition Zone; Humboldt County to northern Mendocino County and adjacent southwestern 

 Trinity County, California. Type locality: mouth of South Fork of Trinity River, Humboldt County. Aug.-Sept. 



4. EPIL6bIUM L. Sp. PI. 347. 1753. 



Mostly herbs, sometimes suffruticose; annual, or usually perennial and wintering by 

 rosettes or turions. Leaves opposite or alternate, nearly or quite sessile, denticulate or 

 entire. Flowers axillary or in terminal racemes or panicles, perfect. Hypanthium sliort 

 or not prolonged at all above the ovary. Sepals 4. Petals 4, usually notched, purplish, pink, 

 or white, even yellow. Stamens 8, the alternate ones shorter. Stigma oblong or 4-lobed. 

 Capsule elongate, subcylindric to fusiform or clavate, 4-celled, loculicidal. Seeds with 

 tuft of silky hairs (coma) at upper end. [Name Greek, meaning upon a pod, flowers and 

 capsule appearing together.] 



Over 100 species, cosmopolitan except in the tropics. Type species, Epilobium hirsutum L. 



Hypanthium not prolonged above the ovary; flowers large, slightly irregular, the petals 1-2 cm. long, entire, 

 spreading. (Subgenus Chamacncrion) 

 Style pilose at base, exceeding stamens; leaves 5-20 cm. long, membranaceous, reticulate-veiny beneath, with 

 lateral veins confluent in marginal loops; racemes many-flowered, elongate, not leafy; seeds oblong, 

 1-1.3 mm. long. 1- ■£■ angustifolium. 



Style glabrous, shorter than stamens; leaves 2-6 cm. long, thick and fleshy, glaucous, not veiny; racemes 

 few-flowered, short, leafy; seeds fusiform, 2 mm. long. 2. E. latifolium. 



Hypanthium prolonged above the ovary; flowers usually smaller, regular, the petals ascending. (Subgenus 

 Ettepilobium) 

 Flowers large, the petals 14-20 mm. long; stigma evidently lobed. 

 Petals purplish or rose-colored; plants cespitose, suffrutescent. 



Leaves rounded at base, denticulate, 1-2 cm. long, subsessile; hypanthium 2-4 mm. long. 



3. E. obcordatum. 



Leaves acute at base, quite entire, 3-4 cm. long, petioled; hypanthium 1-1.5 mm. long. 



4. E. rigidum. 



Petals yellow; plants with creeping underground rootstocks and turions; stems subsimple. 



5. E. luteutn. 

 Flowers smaller, the petals 2-12 mm. long; stigma usually oblong. 



Plant suflfrutescent with several stems from woody caudex and 1-2 dm. tall, pubescent throughout. 



6. E. nivium. 

 Plant not suffrutescent. 



Annuals; stems with exfoliating epidermis; plants of dry situations. 



Stems 3-9 dm. tall, glabrous except in upper parts; leaves usually alternate with fascicles in 



axils; hypanthium 1-3 (8) mm. long. 7. E. paniculatum. 



Stems 0.5-3 dm. tall, puberulent throughout; leaves mostly opposite, without fascicles; hypan- 

 thium scarcely 1 mm. long. 8. E. minutum. 

 Perennials (except sometimes E. calif ornicum) ; epidermis not exfoliating; mostly in moist situations. 

 Rootstocks bearing turions (globose or ovoid winter-buds with fleshy overlapping scales) which 

 may be rather loose in E. glandutosum. 

 Leaves linear-oblong, sessile, nearly entire, obtuse, with margin slightly revolute; rare, 

 very northern part of our range. 9. E. palustre. 



Leaves lanceolate to ovate, not at all revolute. 

 Leaves quite sessile. 



Flowers rather large, the petals 5-10 mm. long; stems simple to divaricately 

 branched. 

 Hypanthium narrow; sepals suberect; stems coarse, simple or virgately 



few-branched above. 10. E. glandulosum. 



Hypanthium about as wide as long; sepals more divaricate; stems rather 

 slender, freely spreading-branched above. 11. E. cxaltatum. 

 Flowers smaller, the petals 2-5 mm. long; stems simple. 



Stems glabrous to pubescent, but not with decurrent lines of hair from leaf- 

 bases. 12. £. brevistylum. 



Stems with decurrent lines of hair from the leaf-bases. 



13. E. Halleanum. 



Leaves (at least some of them) distinctly short-petioled. 



Petals 5-8 mm. long; stems simple. 14. E. delicatum. 



Petals 3-4 mm. long; stems usually branched. IS. E. leptocarputn. 



