EVENING-PRIMROSE FAMILY 181 



4. Boisduvalia macrantha Heller. Large-flowered Boisduvalia. Fig. 3386. 



Boisduvalia macrantha Heller, Muhlenbergia 2: 101. 1905. 



Stems 1-10 dm. tall, simple or few-branched at the base or above, glabrous near the base, 

 villous above. Leaves rather crowded, 2-4 cm. long, 5-9 mm. wide, lanceolate to oblanceolate the 

 upper almost ovate, acute to acuminate, remotely serrulate, sessile ; flowers solitary in the upper 

 axils; hypanthium villous, 2.5-3 mm. long; sepals narrowly lanceolate, villous, 3-6 mm. long; 

 petals rose-purple when dry, divided about one-half their length, the lobes asymmetrically rounded 

 at the tips, 7-10 mm. long; capsule straight lance-linear, 1-2 cm. long, 2 mm. thick near base, 

 with slender apical beak 2-3 mm. long; seeds 5-6 in each row, brownish, somewhat shining, 

 2 mm. long, microscopically cellular-punctate. 



Gravel washes and fields. Upper Sonoran and Transition Zones; Modoc and Shasta Counties to Butte 

 County, California. Type locality : near Redding, Shasta County. May-July. 



5. Boisduvalia stricta (A. Gray) Greene. Narrow-leaved Boisduvalia. Fig. 3387. 



Gayophytum strictum A. Gray, Proc. Amer. Acad. 7: 340. 1867. 

 Boisduvalia Torreyi S. Wats. Bot. Calif. 1: 233. 1876. 

 Boisduvalia stricta Greene, Fl. Fran. 225. 1891. 

 Boisduvalia diffusa Greene, Proc. Acad. Phila. 1895: 547. 1896. 

 Boisduvalia parviflora Heller, Bull. Torrey Club 25: 199. 1898. 



Stems 1-4.5 dm. tall, simple or with few to several erect, virgate branches from near base, 

 pilose and quite canescent throughout. Leaves linear to lanceolate, 1-4 cm. long, 2-3 (4) mm. 

 wide, acute, entire to sharply denticulate, nearly or quite sessile, the upper ones narrower than 

 the lower ones; flowers axillary, often beginning near the base of the plant; sepals 1 mm. long; 

 petals rose-purple or violet, 1.5-2 mm. long; capsule 8-10 mm. long, membranous, slender, 

 usually curved outwards and attenuate, tardily loculicidal ; seeds ovoid, brown, 1 mm. long, 6 to 8 

 in each cell. 



_ Moist spots, Upper Sonoran Zone; eastern Washington and Idaho south to Nevada and to Tulare County, 

 California. Type locality: Cloverdale, Sonoma County, California. May-July. 



6. Boisduvalia pallida Eastw, Pale Boisduvalia. Fig. 3388. 



Boisduvalia pallida Eastw. Leaflets West. Bot. 2: 54. 1937. 



Stems 1-4 dm. tall, slender, mostly branched from the base, sometimes simple, tomentulose 

 and pilose, glabrescent below in age. Leaves not crowded, somewhat reduced above, 1.5-5 cm. 

 long, 3-6 mm. wide, lanceolate, acute to acuminate, subentire, subsessile, strigose to subglabrous ; 

 flowers axillary, even in lowermost axils ; hypanthium soft-pubescent, 2-3 mm. long ; sepals 

 3-4 mm. long, pubescent; petals reddish, 5-8 mm. long; capsule 1.5-3 cm. long, 1.5-2 mm. thick 

 at base, tapering gradually into a slender outcurved beak 2-4 mm. long ; seeds about 6 in each 

 cell, brownish, 1.5—2 mm. long, cellular-pitted. 



Moist places. Upper Sonoran and Transition Zones; Josephine and Jackson Counties, Oregon, and Modoc 

 County, California, south to Tehama and Plumas Counties, California. Type locality: Goose Valley, Shasta 

 County. June— July. 



6. CLArKIA Pursh, FI. Amer. Sept. 1: 260. pi. 11. 1814. 



Annual herbs, simple or branched above, with spicate inflorescence and nodding' or 

 reflexed buds. Hypanthium short or greatly elongated ; sepals distinct or united in an- 

 thesis. Petals distinctly unguiculate, claws at least one-sixth as long as blades ; blades 

 simple or lobed, pink to lavender or purplish. Stamens 4 and alternate with the petals, or 

 8, with the epipetalous ones shorter and sometimes not functional ; anthers linear, fixed 

 near the base. Stigma 4-lobed. the lobes lance-linear to suborbicular. Capsule linear or 

 attenuate above, 4-celled, usually 4-angled (at least when dried). Seeds in one row in 

 each cell, cellular-pubescent and with the cresting reduced, or not pubescent but with 

 minute transverse corrugations and conspicuous cresting. [Named for Captain William 

 Clark, of the Lewis and Clark expedition to the Northwest in 1806. ] 



A genus of 7 species, confined to western North America. Type species, Clarkia pulchella Pursh. 



Blade of petal not lobed, although occasionally with small teeth on the claws; stamens 8; anthers glabrate; seeds 

 cellular-pubescent, scarcely crested. (Subgenus Phaeostoma) 

 Hypanthium with band of hairs within or with scales at summit; anthers not curling after dehiscence; 

 blade of petal 2-4 times the length of the rather broad claw. 

 Sepals united in anthesis- no scales on filaments, but band of hairs within the hypanthium: capsule 

 nearly sessile; petals pinkish. 1- C. delicata. 



Sepals distinct in anthesis; scales present at base of filaments; capsule pediceled; petals piirpli<=b. 



2. C. rhomboidea. 



Hypanthium without band of hairs or scales within; anthers curling slightly after dehiscence; blade of 

 petal about as long as the narrow claw. 3. C. clcgans. 



Blade of petal lobed; anthers usually ciliate-villous. 



Hypanthium 2-4 mm. long; stamens 8; seeds cellular-pubescent, minutely crested. (Subgenus Euclarkia) 

 Petals bilobed with subulate tooth at base of sinus; short stamens functional; hypanthium with ring 



of hairs within. 4. C. Xanttana. 



Petals 3-lobed, lobes about equal; shorter stamens not functional; hypanthium without ring of hairs 

 within. 5. C. pulchella. 



