OF ARTS AND SCIENCES: MAY 13, 1873. 



575 



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Perennial; calyx-tips free, throat naked; seeds smooth, 

 lanee-linear 



Perennial ; calyx-tips short, free, throat very villous ; cap- 

 sule oblong; seeds ovate, angled, tuberculate 

 Annual to perennial, caulescent ; capsules obovate or cla- 

 vate, often pedicelled, quadrangular, the valves ribbed 

 and the angles more or less strongly winged (except in 

 (E. linifolia). 

 t Flowers yellow, erect in the bud. 



Leaves linear-filiform, numerous ; petals 1 -3" long ; stig- 

 mas short; capsules 2-3" long, sessile . 



Leaves linear to oblanccolate, entire; fls. axillary, small ; 

 capsules pubescent, nearly sessile, slightly winged ; 

 Texan 



Leaves narrowly oblanceolate, entire ; fls. loosely spiked, 

 small ; capsule glabrous, sessile or shortly pedicelled, 

 slightly winged 



Leaves ovate to linear, mostly denticulate ; fls. subco- 

 rymbed, mostly £-1' long; capsule strongly winged, 

 subsessile or short pedicelled 



Glabrous, subglaucous ; leaves ovate to ovate-oblong ; fls. 

 larger, corymbose ; capsule very broadly winged . 

 1 1 Flowers white or purple, nodding in the bud. 



Calyx-tube as long as the ovary ; petals white, large, ob- 

 cordate ......... 



Calyx-tube shorter than the ovary ; petals purple, small, 



entire 



* * * * Acaulescent or nearly so ; flowers white or rose-color, 

 erect in the bud ; capsule ovate or ovate-oblong, obtuse- 

 ly or sharply angled, mostly sessile, large and rigid. 



Capsule oblong, ribbed, often doubly crested on the angles ; 

 calyx-tube 2 -7' long; petals | - 1^' long 



Capsule ovoid-conical, not crested, scarcely angled, net- 

 veined ; calyx-tube 1 -2' long ; petals 4 - 9" long 



Capsule ovate, persistent, strongly winged, net-veined ; 

 calyx-tips free, the tube 2 -4' long; petals i- 1' long . 



Capsule ovate, winged, more or less corky, smooth ; calyx- 

 tube 2-4' long ; petals 1 1' long, purplish ; seed-testa 

 thickened 



Capsule 1 - H' long, more attenuate upward, smooth, not 

 corky ; seed-testa not thickened ..... 

 ***** Caulescent perennials ; flowers axillary, yellow ex- 

 cept in CE. canescens, calyx slightly dilated ; capsule 

 ovate to orbicular, strongly angled or broadly winged. 



Low ; capsule ovate, 3 - 4'' long, angled ; petals white and 

 rose-color, 6" long ; calyx-tube 6 - 8" long . 



10. CE. albicaulis. 



1 1 . CE. coronopifolia. 



12. CE. linifolia. 



13. CE. Spachiana. 



14. CE. pumila 



15. CE. fruticosa. 

 16. CE.glauca. 



17. CE. speciosa. 

 18. CE. rosea. 



19. CE. cozspitosa. 



20. CE. primiveris. 



21. CE. triloba. 



22. CE. brackycaipa. 

 23. CE. Wrightii. 



24. CE. canescens. 



