ONAGRACEJE. (EVENING-PRIMROSE FAMILY.) 179 



* * Biennials or perennials : flowers diurnal [opening in sunshine), yellow : ]><>ih dub- 

 shaped, with 4 strong or winged angles and 4 intermediate rilis. 



4. CE. glauca, 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. v 



5. CE. frutiebsa, L. (Sundrofs.) Hairy or nearly smooth (l°-3° 

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

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

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

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



6. CE. riparia, 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 obeordate ; pods oblong -club-shaped, slen- 

 der-pedicelled, scarcely 4-winged ; root biennial. — River-banks and swamps, Qua- 

 ker Bridge, New Jersey, to Virginia and southward. 



7. CE. linearis, Michx. Slender, minutely hoary -pubescent ; leaves linear ; 

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

 ovate, hoary, scarcely 4-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 l'wide. 



8. CE. chrysantha, 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. pumila, L. Almost smooth, small ; leaves lanceolate or oblanceolate, 

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

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

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

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

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



§ 2. Tube of the cah/x funnel-form, strongly A-nerved, and shorter than the cylindrical 

 ovar>/ , its lobes heeled 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. serrulata, Nutt. Stems low, slightly woody at the base ; leaves 

 lance-linear, oblanceolate 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. — Falls of St. Anthony, Wis- 

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



5. JUS SI M A, L. Jussi^a. 



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

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



