ONAGRACE.E. (EVENING-PRIMROSE FAMILY.) 103 



3. GAYOPHYTITM, A. Juss. 



Calyx-lobes reflexed. Petals white or rose-colored. — Very slender branch 

 ing annuals, with linear entire leaves, and very small axillary flowers. 



1. G. ramosissimum, Torr. & Gray. Glabrous, or the inflorescence 

 puberulent, diffusely much branched: flowers £ line long, mostly near the ends 

 of the branches: capsule oblong, 2 or 3 lines long, on pedicels of about the same 

 length or shorter, often deflexed, 3 to 5-seeded. — FL i. 513. Colorado and 

 northward, and westward to Oregon and California. 



2. G. raeemosum, Torr. & Gray. Glabrous, or more or less canescent 

 with short appressed pubescence, the elongated branches mostly simple: flowers 

 \ line long, axillary the whole length of the branches: capsules linear, sessile 

 or very shortly pedicel led, 8 to 10 lines long, usually many-seeded. — Fl. i. 

 514. Colorado and northward, thence westward to Washington and Cali- 

 fornia. 



4. CE NO THEE, A, L. Evening Primrose. 



Calyx-lobes reflexed. Petals obcordate or obovate. Stamens 8. Capsule 

 coriaceous or somewhat woody to membranaceous. — Herbs, or sometimes 

 woody at base : flowers axillary, spicate, or racemose. — Watson, Proc. Am. 

 Acad. viii. 573. 



§ 1. Stigma lobes linear, elongated: calyx-tube linear, slightly dilated at the 

 throat : anthers linear. 



* Caulescent: flowers in a leafy spike, erect in the bud, yellow: capsules sessile, 



coriaceous : seeds in two rows. 



-«- Capsules oblong, slightly attenuate above : seeds with more or less margined 



angles, nearly smooth. 



1. CE. biennis, L. Erect, rather stout, 1 to 5 feet high, usually simple : 

 calyx-tube 1 to 2| inches long : capsule £ to 1 inch long. — Common every- 

 where and very variable. 



Var. grandiflora, Lindl. Petals equalling the calyx-tube. — Same 

 range, but less common eastward. 



•f- h- Capsules linear : seeds not margined, minutely tuberculate. 



2. CE. rhombipetala, Xutt. Spike elongated, dense : calyx silky- 

 canescent : petals rhombic-ovate. — Torr. & Gray, Fl. i. 493. Probably 

 within the eastern limits of our range, and thence to the Indian Territory 

 and northward to Minnesota. 



* * Caulescent : flowers nodding in the bud, white turning to rose-color: capsules 



sessile, mostly linear: seeds in a single row. 



3. CE. pinnatifida, Nntt. Annual or biennial : calyx-tips not free, 

 throat naked : seeds oval, not angled, finely pitted. — Along the eastern slope 

 of the Rocky Mountains from the Dakotas to the Indian Territory and New 

 Mexico. 



4. CE. trichocalyx, Xutt. Annual : calyx very villous ; the tips not free, 

 throat naked : seeds lance-linear, smooth. — Torr. & Gray, Fl. i. 494. (E. del- 

 toidca, Torr. From W. Wyoming to California, and thence to Arizona and 

 New Mexico. 



