ONAGRACEJE. (EVENING-PRIMROSE FAMILY.) 103 



3. GAYOPHYTUM, 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 

 puberuleut, 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. racemosum, Torr. & Gray. Glabrous, or more or less canesceut 

 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 pedicelled, 8 to 10 lines long, usually many-seeded. Fl. i. 514. 

 Colorado and northward, thence westward to Washington Territory and 

 California. 



4. CE NOT HER 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 : /lowers 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. GE. biennis, L. Erect, rather stout, 1 to 5 feet high, usually simple: 

 calyx-tube 1 to 2^ inches long : capsule f to 1 inch long. Common every- 

 where and very variable. 



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

 range, but less common eastward. 



-t- H- Capsules linear : seeds not margined, minutely tuberculate. 



2. <E. rhombipetala, Nutt. 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. (E. pinnatifida, Nutt. Annual or biennial : calyx-tips not free, 

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

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

 Mexico. 



4. CB. trichocalyx, Nutt. Annual : calyx very villous ; the tips not free, 

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

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

 New Mexico. 



