OXAGUACE^. (EVENING-PRIMROSi: FAMILY.) 191 



lar; capsule I -\Y long; seeds strongly pitted. — X.J. to Fla., west to E. Kan 

 and Tex. Very variable. 



* * Caulescent perennial ; flowers axillary, nodding in the bud, ivhite turning 



rose-color; capsules sessile, linear; seeds in a single row. 



fi. CE. albicatllis, Nutt. Stems erect (^-4° high), simple or branched, 

 wliite and often shreddy, glabrous or puberulent ; leaves linear to oblong-lan- 

 ceolate (1-3' long), entire or repaud-denticulate, or sinuate-pinnatifid toward 

 the base; calyx-tips free, throat naked; pods ^-2' long, often curved or 

 twisted ; seeds lance-linear, smooth. — W. Minn, to N. Mex., and westward. 



* * * Caulescent ; flowers diurnal, yellow and erect in the bud {except in n. 11 ) ; 



capsides obovate or clavate, quadrangular, the valves ribbed and the angles 

 more or less strongly loinged {except in n. 7). 



7. CE. linifolia, Xutt. Annual or biennial, erect, very slender, simple 

 or diffuse (6-15' high), glabrous, the branchlets and capsules puberulent; 

 radical leaves oblanceolate, cauline linear-flliform -^-I'long; spikes loosely 

 tiowered ; corolla 2 - 3" long ; stigmas short ; capsules obovate to obloug-clavate, 



2 - 3'' long, not winged, nearly sessile. — 111. to E. Kan., La., and Tex. 



8. CE. pumila, L. Biennial, puberulent, 1-2° high; leaves mostly gla- 

 brous, entire, ol)tuse, the radical spatulate, the cauline narrowly oblanceolate ; 

 flowers loosely spiked; corolla 4-12" long; capsule ^/«6rows, oblong-clavate, 



3 - 6'' long, sessile or on a short pedicel, slightly winged. (Incl. CE. chrysantha, 

 Michx.) — Dry fields, N. Scotia to N. J., west to ^linn. and Kan. June. 



9. CE. fruticosa, L. (Sundrops.) Biennial or perennial, erect, often 

 tall and stout (1-3° liigh ) , villous-pubescent or puberulent or nearly glabrous ; 

 leaves oblong- to linear-lanceolate, mostly denticulate ; raceme corymbed or loose : 

 petals 9- 12" long; capsule subsessile or ivith a pedicel shorter than itself, promi- 

 nently ribbed and strongly ivinged. — Common and very variable. 



Var. linearis, Watson. Leaves linear to linear-lanceolate ; capsule usually 

 shorter than the pedicel, rather less broadly winged. (CE. linearis of Man., in 

 part. CE. riparia, Xutt.) — Conn, to Fla., west to Mo. and La. 



Var. humifusa, Allen. Low, decumbent, somewhat woody, diffusely 

 branched, puberulent ; branches slender, flexuous ; leaves narrow ; flowers 

 few, small; capsules pubescent, about equalling the pedicel. (CE. linearis of 

 Man., in part.) — Suffolk Co., L. Island. 



10. CE. glauca, Michx. Perennial, erect (2-3° high), glabrous and glau- 

 cous ; leaves ovate to ot'afe-oWo«(7 (2-4' long), repand-denticulate ; y?o?rers in 

 short leafy corymbs; petals 9-15''' long ; capsule glabrous, ovoid-oblong, i'e?'j/ 

 broadly winged, usually abruptly contracted into a pedicel equalling or shorter 

 than itself. — Mountains of Va. to Ala., west to Ky. and E. Kan. 



11. (E. speciosa, Xutt. Perennial, erect or subdecumbent, finely pu- 

 bescent ; leaves oblong-lanceolate to linear, repand-denticulate, or more or less 

 deeply sinuate-pinnatifid ; flowers large, ivhite or rose ; capsule clavate-obovate, 

 strongly 8-ribbed, rigid, acute, stoutly pedicelled. — Mo. to Kan. and Tex. 



* * * * Capsule oblong to ovate or orbicular, broadly winged, rigid and sessile. 



+- Acaulescent or nearly so ; flowers white or rose-color. 



12. CE. triloba, Nutt. Biennial or perennial, nearly glabrous; leaves 

 2-10' long, somewhat ciliate, long-petioled, runcinate-pinnatifid or oblanceo- 



