EVENING-PRIMROSE FAMILY 179 



long-ovate, obtuse, 2-5 cm. long ; flowers few ; petals 3 mm. long, white or rose-tipped ; capsules 

 slender, erect, linear, less than 1 mm. thick 4—5 cm. long; seeds smooth, about 1 mm. long, at- 

 tenuated to a beak, with dingy coma. 



Moist slopes and banks, Canadian Zone to Arctic- Alpine Zone; Alaska to southern California, Colorado, 

 and New Hampshire; also Eurasia. Type locality: Old World. July-Aug. 



22. Epilobium adenocaulon Hausskn. Northern Willow-herb. Fig. 3380. 



Epilobium adenocaulon Hausskn. Oest. Bot. Zeitschr. 29: 119. 1879. 



Epilobium concinnum Congdon, Erythea 7: 184. 1900. 



Epilobium glandulosum var. adenocaulon Fernald, Rhodora 20: 35. 1918. 



Perennial, stem erect, 3-10 dm. tall, glabrous below, glandular-pubescent (and with few or 

 no incurved hairs) in inflorescence, simple or weakly branched below, freely branched above, 

 innovations by rosettes. Leaves glabrate to glabrous, ovate- to elliptic-lanceolate, 3-6 cm. long, 

 obtuse to acute, serrulate, rounded into very short, winged petioles, upper leaves gradually re- 

 duced and somewhat pubescent ; sepals 2 mm. long ; petals white or pale or even reddish, 4 mm. 

 long ; fruiting pedicels 3-8 mm. long ; capsule slender, usually reddish, 4-6 cm. long, glabrate in 

 age ; seeds obovoid, 1 mm. long, abruptly short-beaked, with whitish coma. 



Moist places, mainly in Transition Zone; British Columbia to southern California and Atlantic States. 

 Type locality: Ohio. July-Aug. 



Epilobium adenocaulon var. occidentale Trelease, Rep. Mo. Bot. Card. 2: 95. pi. 23. 1891. (Epilobium 

 occidentale Rydb. Mem. N.Y. Bot. Card. 1:275. 1900; E. glandulosum var. occidentale Fernald, Rhodora 

 20: 35. 1918; E. calif ornicum var. occidentale Jepson, Man. Fl. PI. Calif. 670. 1925.) Leaves narrowly 

 lanceolate, narrower than in the species; flowers purple or rose, the petals 5-6 mm. long. Wet places. Transition 

 Zone; British Columbia to central California and Utah. Type locality: not given. 



Epilobium adenocaulon var. perplexans Trelease, op. cit. 96. (Epilobium perplexans Trelease ex Coult. 

 & Nels. Man. Bot. Rocky Mts. 337. 1909; E. glandulosum var. perplexans Fernald, Rhodora 20: 35. 1915; 

 E. praecox Suksd. Werwenda 1: 27. 1927; E. griseum Suksd. op. cit. 28.) Usually less than 3 dm. tall, not 

 so glandular, slender and rather simple. Leaves thin, tapering at base to slender petioles; flowers whitish; petals 

 4 mm. long. Moist places. Transition Zone; eastern Washington to eastern California and Rocky Mountains. 

 Type locality: not given. 



23. Epilobium calif ornicum Hausskn. California Willow-herb. Fig. 3381. 



Epilobium californicum Hausskn. Mon. Epilob. 260. 1884. 

 Epilobium Parishii Trelease, Zoe 1:210. 1890. 

 Epilobium Palmcri Levi. Rep. Nov. Spec. S: 98. 1908. 

 Epilobium cinerascens Piper, Proc. Biol. Soc. Wash. 30: 75. 1917. 

 Epilobium californicum var. Parishii Jepson, Man. Fl. PI. Calif. 670. 1925. 



Annual or perennial, erect, 3-10 dm. tall, branched freely, not at all glandular in the inflores- 

 cence, having a whitish more or less appressed pubescence about the flowers and young capsules. 

 Leaves lanceolate to lance-ovate, Z-7 cm. long, serrulate, short-petioled ; sepals 2 mm. long ; petals 

 white or pink, 2-4 mm. long ; capsules slender, 4-6 cm. long ; seeds as in the preceding species. 



Moist places in valleys and lower canyons, Upper Sonoran and Transition Zones; western Washington to 

 California, west of the Sierra Nevada. Intergrading freely with E. adenocaulon and the following variety. Type 

 locality: "Colonia Ross," Sonoma County, California. June-Sept. 



Epilobium californicum var. holosericeum (Trelease) Jepson, Man. Fl. PI. Calif. 670. 1925. (.Epilo- 

 bium holoscriccum Trelease, Rep. Mo. Bot. Card. 2: 91. pi. 17. 1891.) With habit of the species, but canescent 

 throughout with soft subappressed hairs; petals 4-5 mm. long, pink to purple. Moist places, valleys of Calitornia 

 west of the Sierra Nevada and south to the border. Type locality: San Bernardino County, California. 



24. Epilobium franciscanum Barbey. San Francisco Willow-herb. Fig. 3382. 



Epilobium franciscanum Barbey, Bot. Calif. 1: 220. 1876. 

 Epilobium Congdonii Levi. Rep. Nov. Spec. 5: 98. 1908. 

 Epilobium Watsonii var. franciscanum Jepson, Man. Fl. PI. Calif. 670. 1925. 



Perennial, rosuliferous, with rather coarse reddish stems, 3-10 dm. tall, glabrate ^f?^' ^^' 

 canescent to subpilose and sometimes glandular above, with numerous usually crowded branches 

 above. Leaves numerous, prevailingly opposite, elliptic-lanceolate to ovate-lanceolate, obtuse, 

 serrate, glabrate to pubescent, Z-^ cm. long, generally rounded at base mto very short broad 

 petioles; flowers at first crowded, scarcely exceeding the somewhat reduced upper leaves ; truit- 

 ing pedicels commonly 5-10 mm. long ; sepals 4-5 mm. long, reddish ; petals usually red-purple, 

 6-10 mm. long, deeply emarginate; capsule slender, 5-8 mm. long, pubescent; seeds 1 mm. long, 

 half as wide, with whitish coma. . 



Wet places, Upper Sonoran and Transition Zones; Lower Columbia River to central coastal California. Type 

 locality: near San Francisco, California. May-July. 



Epilobium Watsonii Barbey, Bot. Calif. 1: 219. 1876. Not certainly distinct frotn the preceding species; 

 more pubescent, leaves less dentate. Coast of Sonoma County, California. Type locality. Fort Koss. 



5. BOISDUVAlIA Spach, Hist. Veg. 4: 383. 1835. 



Caulescent, mostly erect annuals. Leaves alternate, simple, sessile. Flowers small, or 

 minute, in leafy spikes, or axillary to foliage leaves. Hypanthium produced above the 

 ovarv, short, funnelform; sepals 4, erect. Petals 4, sessile, obovate 2- obed purple to 

 white. Stamens 8, those opposite the petals shorter; anthers basifixed, all perfect; pollen 



