1. Clarkia rhomboidea Dougl. ex Hook., Fl. Bor. Amer. 1 : 214. 1834. 



Gila and Pima Counties, 3,000 to 6,000 feet, rather dry and often 

 disturbed places, May and June. South Dakota to Washington, 

 Arizona, and Baja California. 



The rose-purple petals may or may not be dotted. 



6. GODETIA 93 



Plants annual, herbaceous; leaves linear to spatulate, the lower ones 

 usually deciduous, the secondary ones borne in fascicles; hypanthium 

 with an inner ring of hairs; seeds with a fimbriate upper margin. 



Key to the species 



1. Buds erect; hypanthium with the inner ring of hairs about one-third way from 

 the base; petals lavender to purple; sepals usually distinct in anthesis; 

 capsule 2 to 3 mm. thick 1. G. quadrivulnera. 



1. Buds nodding; hypanthium with the inner ring of hairs near the summit; 

 petals whitish; sepals united in anthesis; capsule 1 to 1.5 mm. thick. 



2. G. EPILOBIOIDES. 



1. Godetia quadrivulnera (Dougl.) Spach, Hist. Nat. Veg. 4: 389. 



1835. 



Oenothera quadrivulnera Dougl. ex Lindl., Bot. Reg. 13: pi. 

 1119. 1828. 



Gila County, Pinal Mountains {Harrison 1897), and Mazatzal 

 Mountains (Mrs. Collom), Pima County, Tucson (Thornber 2530), 

 April to .May. Washington to Arizona and Baja California. 



2. Godetia epilobioides (Nutt.) S. Wats, in Brewer and Wats., Bot. 



Calif. 1: 231. 1876. 



Oenothera epilobioides Nutt. ex Torr. and Gray, Fl. North 

 Amer. 1: 511. 1840. 



Pinal, Maricopa, and Pima Counties, 1,500 to 3,000 feet, damp and 

 disturbed places, March to May. Southern Arizona to central Cali- 

 fornia and Baja California. 



7. OENOTHERA. 94 Evening-primrose, sundrops 



Plants herbaceous; leaves alternate or basal; flowers yellow or 

 white, rarely red except in age, when commonly so; hypanthium 

 deciduous after flowering; sepals and petals 4; stamens 8, equal or 

 unequal; capsule straight, curved, or coiled, membranous or woody, 

 4-celled, 4-valved, dehiscent; seeds many, naked. 



9 3 Reference: Hitchcock, C. Leo. revision of north American species of godetia. Bot. Gaz. 89: 



321-361. 1930. 



94 References: Munz, Philip A. studies in onagraceae— 1. a revision of the subgenus chylismia 



OF the genus Oenothera. Amer. Jour. Bot. 15: 223-240. 1928. 



2. REVISION OF THE NORTH AMERICAN SPECIES OF SUBGENUS SPHAEROSTIGMA. Bot. 



Gaz. 85: 233-270. 1928. 



3. A REVISION OF THE SUBGENERA TARAXIA AND EULOBUS. Amer. Jour. Bot. 16: 246- 



257. 1929. 



4. A REVISION OF THE SUBGENERA SALPINGIA AND CALYLOPHIS. Amer. Jour. Bet. 16: 

 702-715. 1929. 



5. THE NORTH AMERICAN SPECIES OF THE SUBGENERA LAVAUXIA AND MEGAPTERIUM. 



Amer. Jour. Bot. 17: 358-370. 1930. 



6. the subgenus anogra. Amer. Jour. Bot. 18: 309-327. 1931. 



7. the subgenus pachylophis. Amer. Jour. Bot. 18: 728-738. 1931. 



8. the subgenus hartmannia. Amer. Jour. Bot. 19: 755-765. 1932. 



9. the subgenus raimannia. Amer. Jour. Bot 22: 645-663. 1935. 



