onagkacejE. (evening-primeose family.) 179 



* * Biennials or perennials: Jhwers diurnal (opening in sunshine), yellow: pods club- 

 shaped, with 4 strong or winged angles and 4 intermediaie ribs. 

 i. CE. glatica, Michx. Very glabrous, glaucous ; leaves ovate or ovate- 

 lanceolate ; pods obovoid-oblong, i-winged, almost sessile ; root perennial. -^ Moun- 

 tains of Virginia, Kentucky, and southward. May -July. — Leaves broader 

 and flowers larger than in the next. 



5. (E. frutie6sa, L. (Sundkops.) Hairy or nearly smooth (l°-3° 

 high) ; leaves lanceolate or oblong ; raceme corymbed, naked below ; petals broadly 

 obcordate, longer than the calyx-lobes and stamens ; pods oblong-club-shaped, 4- 

 winged, longer than the pedicels; root perennial. — Open places, S. New England 

 to Illinois, and southward. June - Aug. — Corolla 1^' broad. 



6. CE. ripiria, Nutt. Scarcely pubescent ; leaves linear-lanceolate, elon- 

 gated, tapering below and somewhat stalked; flowers (large) in a rather leafy at 

 length elongated raceme ; petals slightly obcordate ; pods oblong-club-shaped, slen- 

 der-pedicelled, scarcely i-winged ; root biennial. — Kiver-banks and swamps, Qua- 

 ker Bridge, New Jersey, t» Virginia and southward. 



7. CE. linearis, Michx. Slender, minutely hoary-pubescent ; feaucs Zmrar ,• 

 flowers (rather large) somewhat corymbed at the end of the branches ; pods ob- 

 ovate, hoary, scarcely i-winged at the summit, tapering into a slender pedicel. — Mon- 

 tauk Point, Long Island, to Virginia and southward. June, July. — Plant 1° 

 high, bushy-branched : flowers 1 ' wide. 



8. CE. ehrys^ntha, Michx. Slender, smooth or pubescent ; leaves lance- 

 olate, rather blunt ; flowers crowded or at first corymbed ; petals obovate, notched 

 at the end (orange-yellow), longer than the stamens : pods all pedicelled, oblong-club- 

 shaped, scarcely wing-angled; root biennial? — Banks, Oswego, New York, to 

 Wisconsin and northward. July. — Stem 12'- 15' high ; flowers larger than in 

 No. 9, from which it may not be distinct. 



9. CE. ptimila, L. Almost smooth, small ; leaves lanceolate or ohlanceolate, 

 mostly obtuse ; flowers in a loose and prolonged leafy raceme ; petals obcordate 

 (pale yellow), scarcely longer than the stamens ; pods almost sessile, oblong-club- 

 shaped, strongly wing-angled ; root perennial or biennial 1 — Dry fields : com- 

 mon northward, and southward along the Alleghanies. June. —Stems mostly 

 simple, 5'- 12' high : the corolla J' broad. 



§ 2. Tube of the calyx funnel- form, strongly 4-nerved, and shorter than the cylindrical 

 ovary, its lobes keeled with the midrib: filaments opposite the petals shorter: an- 

 thers oblong, versatile: stigma disk-shaped, almost entire: flowers opening in sun- 

 shine or daylight. 



10. CE. serr\ll&,ta, Nutt. Stems low, shghtly woody at the base; leaves 

 lance-linear, ohlanceolate or linear-spatulate, sharply serrulate or toothed; flow- 

 ers axillary mostly small ; petals yellow, obovate, wavy-crenulate, much longer 

 than the stamens; pods cylindrical, puberulent. — Palls of St. Anthony, Wis- 

 consin (Lesquereux, T. J Hale), and westward. 



5. JTJSSI^A, L. JussiiEA. 



Oalyx-tube elongated, not at all prolonged beyond the ovary ; the lobes 4-6, 

 herbaceous and persistent. Petals 4-9. Stamens tmce as many as the petals. 



