122 Flora of the Palouse Region 



leaves linear or linear-lanceolate, often curved and folded, acute, denticulate, 

 2-5 cm. long, attenuate to a short petiole: flowers pink or whitish, variable 

 in size, usually 4-10 mm. broad, in loose racemes terminating the almost 

 naked branches: petals notched: capsules lanceolate-linear, 1-1.5 cm. long, 

 on pedicels about as long. Common and variable. 



E. adenocauloil Haussk. Perennial by short stolons which produce 

 fleshy rosettes in the fall: stems erect, 30-60 cm. high, usually simple, leafy, 

 glabrous or puberulent, sometimes glandular above: leaves mostly opposite, 

 lanceolate, acutish, closely denticulate, glabrous orpuberulent, 5-7 cm. long, 

 sessile: inflorescence terminal, becoming loose: petals notched, about 4 mm. 

 long, pink: capsules linear, nearly sessile, 6-8 cm. long, usually puberulent; 

 seeds minutely papillate. Low ground, common. Very variable. 



198. GAYOPHYTUM. 



Very slender caulescent branching annuals: leaves alternate, 

 linear, entire: flowers axillary: calyx-tube not prolonged beyond 

 the ovary, 4-parted: petals 4, white or rose-colored, very small, 

 obovate or oval, with a very short claw: stamens 8; anthers broad 

 or rounded, attached by the middle, those opposite the petals on 

 shorter filaments and usually sterile: ovary 2 -celled: fruit a dehis- 

 cent capsule, seeds few-many, naked, in one row. 



Branched above: capsules slender-pedicelled. G. RAMOSISSIMUM. 



Simple or branched at base: capsule sessile. G. pumilum. 



G. ramosissimum Torr. & Gray. Erect, with usually many slender 

 branches, glabrous below, puberulent above, 15-40 cm. high: leaves linear 

 or linear-lanceolate, 1-4 cm. long, acute, attenuate at the sessile base: flow- 

 ers pink, small, 2-4 mm. broad, pedicelled: capsules oblong or somewhat 

 club-shaped, often torulose, 6-12 mm. long, spreading, on slender pedicels, 

 sometimes deflexed; seeds not hairy. Dry soil, Thatuna Hills. 



G. pumilum Wats. Erect, simple or branched at base, 5-15 cm. high, 

 glabrous or minutely puberulent: leaves numerous, lanceolate, acute, atten- 

 uate to the sessile base, 1-2 cm. long: flowers minute: capsules stout, sessile, 

 10-22 mm. long, usually appressed to the stem; seeds smooth. Thatuna 

 Hills, rare. 



199. CLARKIA. 



Annual, with erect brittle stems: leaves alternate on short slen- 

 der petioles, the uppermost sessile: flowers showy, in terminal 

 racemes: calyx-tube obconical above the ovary, 4-cleft: petals 4, 

 with claws, lobed or entire, purple or violet: stamens 8, those op- 

 posite the petals often sterile; anthers attached at their bases, erect: 

 ovary 4-celled: capsule linear, attenuate above, coriaceous, erect, 

 somewhat 4-angled, 4-celled and 4-valved to the middle; seeds 

 numerous. 



Blade of the petals 3-lobed. C. puixhkula. 



Blade of the petals entire. C. rhomboidea. 



C. pulchella Pursh. vStems erect, much branched above, 15-60 cm. high, 

 puberulent: leaves linear or linear-lanceolate, entire, rather obtuse, short- 



