104 ONAGRACE^E. (EVENING-PRIMROSE FAMILY.) 



5. CE. albicaulis, Nutt. Perennial: stems white and shreddy : calyx-tips 

 free, throat naked : seeds smooth, lance-linear. A very variable species. From 



^K T ew Mexico and Colorado to Washington Territory and British America. 



6. CE. COronopifolia, Torr. & Gray. Perennial : calyx-tips short, free, 

 throat very villous : capsule oblong : seeds ovate, angled, tuberculate. Fl. i. 495. 

 From Nebraska to the Uintas, and southward to New Mexico. 



* * * Acaulescent, or nearly so : flowers erect in the bud, white or rose-color: 



capsules mostly sessile, ovate or ovate-oblong, obtusely or sharply angled, large 

 and rigid. 



7. CE. CcBSpitOSa, Nutt. Capsule oblong, ribbed, often doubly crested on 

 the angles : calyx-tube 2 to 7 inches long : petals f to If inches long. 

 (E. marginata, Nutt. From the Upper Missouri to Nebraska and southward 

 to Nevada, New Mexico, etc. 



8. CE. triloba, Nutt. Capsule ovate, persistent, strongly winged, net-veined : 

 calyx-tips free, the tube 2 to 4 inches long : petals % to 1 inch long. From 

 British Columbia to Mexico, and westward to California. 



Var. (?) parviflora, Watson. Flowers very small, about an inch or two 

 long, fertilized in the bud and rarely fully opening : fruit abundant, forming 

 at length a densely crowded hemispherical or cylindrical mass, nearly 2 inches 

 in diameter and often 2 or 3 inches high. Proc. Am. Acad. xii. 251. Plains 

 of Kansas and Nebraska. 



9. CE. brachycarpa, Gray. Capsule ovate, winged, more or less corky, 

 smooth: calyx-tube 2 to 4 inches long: petals 1$ inch long, purplish: seed-testa 

 thickened. PI. Wright, i. 70. ? (E. marginata, var. purpurea, of the various 

 reports. From Montana to Nevada, New Mexico, and W. Texas. 



* * * * Caulescent : flowers axillary : capsule ovate to orbicular, strongly angled 



and broadly winged. 



10. CE. canescens, Torr. Low: capsule ovate, 3 to 4 lines long: petals 

 white and rose-color, 6 lines long : calyx-tube & to 8 lines long. From the head- 

 waters of the Platte to New Mexico. 



11. CE. Missouriensis, Sims. Capsule 1 to 3 inches long, with wings 

 nearly as broad: calyx-tube 2 to 5 inches long: petals 1 to 2^ inches long, yellow: 

 seeds strongly crested. From Missouri to Colorado and Texas. 



2. Stigma capitate : calyx-tube linear, persistent : flowers erect in the bud, 

 yellow: anthers oblong: capsules sessile, linear to ovate: seeds in two rows: 

 mostly acaulescent. 



12. CE. breviflora, Torr. & Gray. Subpubescent : leaves deeply pinna- 

 tifid : calyx-tube 3 to 6 lines long : petals 3 lines long. Wyoming, Colorado, 

 Utah, and westward. 



3. Stigma discoid : calyx-tube more broadly dilated above : flowers erect in the 

 bud, yellow, axillary : anthers oblong-linear : capsule mostly sessile, linear- 

 ci/lindric. 



13. CE. Hartwegi, Benth. Low, 3 to 15 inches high : leaves numerous, 

 linear to lanceolate, mostly entire : calyx-tube 1 to 2 inches long, the tips free 

 and linear: petals 4 to 12 lines long: capsule 8 to 10 lines long. 



