EVENING-PRIMROSE FAMILY 183 



Hypanthium 15-30 mm. long; stamens 4; seeds not cellular-pubescent but transversely corrugated, and with 

 conspicuous cresting. (Subgenus Eucharidmm) 



Filaments club-shaped toward tips; anthers not coiling after dehiscence; middle lobe of petal much 

 narrower than lateral ones; stigma-lobes lance-linear, 3 mm. long. 6. C. Brcwcrt. 



Filaments flattened but not club-shaped; anthers coiling after dehiscence; middle lobe of petals at least 

 as wide as lateral ones; stigma-lobes rounded, 1 mm. long. 7. C. concinna. 



1. Clarkia delicata (Abrams) Nels. & Macbr. Delicate Clarkia. Fig. 3389. 



Codetta delicata Abrams, Bull. Torrey Club 32: 539. 1905. 

 Clarkia delicata Nels. & Macbr. Bot. Gaz. 65: 60. 1918. 



Simple to sparingly branched from the middle, with stems 3-5 dm. tall, nearly glabrous. 



Leaf-blades narrowly to broadly lanceolate, remotely to rather sharply denticulate, 2-5 cm. long, 



acute or nearly so, with slender petioles 5-15 mm. long; flowers in long loose spike; inflorescence 



strigillose ; buds nodding, obovoid ; hypanthium 1-3 mm. long with band of hairs on upper half of 



inner surface; sepals united in anthesis, green or reddish; petals spatulate, 1-1.5 cm. long, the 



blade rose-pink and 2-3 times as long as the slender whitish claw ; stamens 8, in two unequal sets, 



the longer ones about half the length of petals; stigma-lobes rounded, 1-1.5 mm. long; capsule 



1.5-2.5 cm. long, subsessile, slightly beaked; seeds brown, cellular-pubescent, oblique-prismatic, 



not crested. 



Dry slopes in the chaparral, Upper Sonoran Zone; eastern San Diego County, California. Type loc,ality: 

 between Campo and Potrero. May. 



2. Clarkia rhomboidea Dougl. Rhomboid Clarkia. Fig. 3390. 



Clarkia rhomboidea Dougl. in Hook. Fl. Bor. Amtr. 1: 214. 1834. 



Phaeostoma Douglasii Spach, Ann. Mus. Paris II. 4: 395. 1835. 



Clarkia gauroides Dougl. ex Sweet, Brit. Flow. Card. II. 4: pi. 379. 1838. 



Clarkia virgata Greene, Erythea 3: 123. 1895. 



Godetia latifolia Nels. & Kenn. Proc. Biol. Soc. Wash. 19: 156. 1906. 



Simple or few-branched, 2-11 dm. tall, finely pubescent. Leaves few, subopposite, lance- 

 ovate to ovate-oblong or elliptic, the blades 2—7 cm. long, acute, entire or remotely denticulate, 

 glabrate to finely pubescent ; petioles 1-3 cm. long ; flowers in elongated spikes, buds nodding ; 

 hypanthium 1-3 mm. long, with scales and white hairs at summit ; sepals green, usually distinct 

 in anthesis ; petals 5-10 mm. long, rose-purple, sometimes dotted, rhomboidal, with the blade 

 2-4 times as long as the claw ; stamens unequal, each with a scale at the base ; stigma-lobes 

 rounded, 0.5 mm. long; capsules 1-3 cm. long, 2-4 mm. thick, 4-angled when dry, on pedicels 

 1^ mm. long; seeds brown, densely cellular-pubescent, 1 mm. long, with a thickened ridge at 

 summit, and almost no cresting. 



Fairly dry slopes, Upper Sonoran and Transition Zones; Washington to northern Lower California and 

 Arizona. Type locality: "From the Great Falls of the Columbia to the Rocky Mountains." Collected by Douglas, 

 May-July. 



3. Clarkia elegans Dougl. Elegant Clarkia. Fig. 3391. 



Clarkia elegans Dougl. in Lindl. Bot. Reg. 19: pi. 1575. 1833. 

 Clarkia unguiculata Lindl. Bot. Reg. 23: pi. 1981. 1837. 

 Gauropsis lancifolia Presl, Epimel. Bot. 219. 1849. 

 Clarkia Eiseniana KtW. Proc. Calif. Acad. 7 : 94. 1877. 



Simple or branched, 2-8 dm. tall, the stems glabrous, glaucous. Leaves lanceolate to lance- 

 ovate, 2-5 cm. long, acute, remotely denticulate, glabrous, sometimes glaucous, sessile or with 

 winged petioles, 2-7 mm. long; inflorescence pubescent to glandular and pilose, loose; hypan- 

 thium 2-4 mm. long, with a ring of hairs within about half way from the base, and with hairs 

 about the base of the stamens ; sepals united in anthesis ; petals rose to purple, 1-2 cm. long, the 

 blade deltoid-rhomboidal, about as long as the narrow claw ; stamens unequal, 8, the longer alter- 

 nate ones about as long as claws ; stigma-lobes short, rounded, 1-1.5 mm. long ; capsule 1-2.5 cm. 

 long, about 2 mm. thick, sessile, beakless, usually glandular and pilose, curved to straight ; seeds 

 brown, 1 mm. long, cellular-pubescent, angled, with very inconspicuous cresting. 



Dry slopes in chaparral and similar places, Upper Sonoran Zone; Mendocino County and Sierra Nevada 

 foothills to southern California. Type locality: California. May-June. 



4. Clarkia Xantiana A. Gray. Xantus' Clarkia. Fig. 3392. 



Clarkia Xantiana A. Gray, Proc. Bost. Soc. Nat. Hist. 7: 145. 1859-1861. 

 Clarkia parviflora Eastw. Bull. Torrey Club 30:492. 1903. 

 Phaeostoma Xanthiana A. Nels. Bot. Gaz. 52:267. 1911. 



Simple or sparingly branched from near the middle, 2-7 dm. tall, glaucous especially below, 

 strigillose above. Leaves lanceolate, acute, entire to denticulate, sessile or with short petiole, 

 finely pubescent to glabrate; inflorescence a long loose, grayish strigillose spike; hypanthium 

 2-4 mm. long, with a broad band of hair within; sepals 7-15 mm. long, grayish green, usually 

 united in anthesis ; corolla irregular, the two lower petals turned aside ; petals lavender to rose, 

 often with large spot of crimson or purple at base of blade, cuneate, bilobed, with small tooth at 

 base of V-shaped sinus, the blade 7-11 mm. long, the claw 3-A mm.; stamens unequal, the longer 

 about equaling the petals ; stigma-lobes short, rounded ; young ovaries deflexed ; capsules erect. 



