270 Onagraceae 



age. Stamens 8 ; anthers versatile, oblong. Style fili- 

 form ; stigma capitate. Ovary 4-celled, usually linear, 

 4-angled, often contorted, membranous, sessile, dehiscent 

 loculicidally. Seeds in 1 row in each cell. 



* Flowers yellow, axillary. 



*- Capsule more or less contorted. 



"Flowers more than 1 cm. broad. 



1. S. viridescens (Lehm.) Walp. Silvery-canescent, with a 

 short and dense appressed pubescence; branches prostrate or 

 ascending, 3-8 dm. long, somewhat woody ; leaves rather thick, 

 spatulate-oblong or linear-oblong to ovate-cordate, sessile, usually 

 entire, 2 cm. long or more; petals 12-16 mm. long, turning green- 

 ish in age ; anthers linear-oblong, fixed below the middle ; cap- 

 sule short-pubescent. (CEnothera viridescens Lehm.; (E. chei- 

 ranthifolia sujfruticosa Wats.) 



Common on the sand-dunes along the seashore. Flowering nearly through- 

 out the year. 



2. S. spirale (Lehm.) Walp. Stems herbaceous, prostrate or 

 ascending, 3-6 dm. long; leaves rather thick, spatulate to ovate- 

 cordate, the lowest short-petioled, entire or dentate, more or less 

 hirsute; calyx-pubescent; petals 8-12 mm. long, turning red or 

 tawny in age ; anthers linear-oblong, fixed in the middle ; cap- 

 sule acutely 4-angled, hirsute. (CE. cheiranthifolia of Bot. Cal.) 



With the last but less common. 



3. S. bistorta (Nutt.) Walp. Stems prostrate or ascending, 

 2-5 dm. long; leaves thinner, narrowly lanceolate to ovate, the 

 upper mostly sessile and rounded or cordate at base, all denticu- 

 late or dentate; calyx hirsute; petals 8-14 mm. long; capsule 

 8-18 mm. long, 2 mm. wide or more; beak very short. (CE. 

 bistorta Nutt.) 



Very common in sand-washes about San Diego, where it was first col- 

 lected by Nuttall; extending north to Santa Barbara. 



4. S. Veitchianum (Hook.) Small. Stems decumbent or 

 ascending, 2-4 dm. long ; leaves linear-oblong, lanceolate or ovate, 

 more or less hirsute; calyx hirsute; petals 10-15 mm. long; cap- 

 sule 2.5-4 cm. long, 1-1.5 mm. wide, attenuate into a long beak. 

 (CE. bistorta Veitchiana Hook.) 



Very common in all our valleys in sandy soil. 



