OF ARTS AND SCIENCES : MAY 13, 1873. 583 



segments as broad as the raehis ; calyx-segments with short, free tips, 

 the tube 4' long, with the throat densely villous ; petals 4 - 8" long ; 

 capsule oblong or linear-oblong, pubescent, 3 - 9" long, 2" or more 

 broad ; seeds large, ovate and angled, tuberculate-costate, subapiculate, 

 %" long. — From Nebraska to the Uintas, and southward to New 

 Mexico. 



* * * Annual to perennial caulescent herbs ; flowers " mostly diur- 

 nal " ; calyx-tube linear, the throat a little expanded ; capsule obo- 

 vate or clavate, often pedicelled, quadrangular, the ribs prominent, 

 and the angles more or less prominently winged (except in (E. lini- 

 . folia), rather cartilaginous and rigid, the dissepiments often evan- 

 escent ; seeds in double rows, small, oblong, angled. — (Enotherium, 

 Seringe. 



f Flowers yellow, erect in the bud. — Kneiffia, Spach. 



12. CE. lixifolia, Michx. Annual or biennial, erect, very slen- 

 der, simple or diffuse, 6- 15' high, glabrous, the branchlets and capsules 

 puberulent ; radical leaves oblanceolate, the cauline linear-filiform, 

 £ — 1' long, numerous and fascicled; spike loosely flowered, the bracts 

 short, ovate to lanceolate; calyx-tube \ -!"• long, slender, shorter than 

 the ovary ; petals 1 - 3" long ; stigmas short ; capsules sessile, obovate, 

 obtuse, 2 - 8" long, not winged ; seeds smooth. — From the Indian Ter- 

 ritory to Louisiana and Texas. 



13. CE. Spachiana, Torr. & Gray. Annual, erect, simple or 

 branched, G - 15' high, puberulent ; leaves linear to oblanceolate, 1-2' 

 long, obtuse, entire ; flowers axillary ; calyx-tube 3 - 4" long, nearly 

 equalling the petals ; capsules pubescent, 5 - 7" long, obovate-clavate, 

 with a slender base, prominently ribbed, slightly winged towards the 

 apex ; seeds smooth. — Texas. 



14. CE. pumila, L. Closely resembling the last. Biennial, puber- 

 ulent ; stems ascending, 1-2° high ; leaves mostly glabrous, entire, the 

 radical spatulate, the cauline narrowly oblanceolate ; spike loose, leafy ; 

 capsule glabrous, sessile or on a'short pedicel. — From New England 

 and Canada to the Saskatchewan, and southward to New Jersey, " and in 

 the mountains to Georgia." (E. chrysantha must be referred here. 



15. CE. fruticosa, L. Biennial or perennial, erect, simple or 

 branching above, often tall and rather stout, 1-3° high, villous-pu- 

 bescent, puberulent or nearly glabrous ; leaves ovate to narrowly lan- 

 ceolate, 1 -3' long, usually acute, mostly repandly denticulate, sessile 



