138 onagracejE. (evening-primrose family.) 



6-8. Style declined : stigma 4-lobcd. Ovary 3 - 4-cellcd. Fruit 3 - 4-angled, 

 mostly 1-celled, 1 -4-seeded. — Herbs with alternate leaves, and white or purple 

 flowers in a long-pcduneled raceme or spike. 



1. G. biennis, L. Soft-hairy; leaves oblong-lanceolate, acuminate, be- 

 coming smoothish, wavy-denticulate on the margins; petals spatulate, white; 

 fruit obtusely 4-angled, acuminate at both ends, sessile. — Dry soil, Georgia to 

 Tennessee, and northward. July and August. (^ — Stem 3° - 8° high. Spikes 

 compound. 



2. G. angUStifolia, Michx. Stem simple, or sparingly branched, closely 

 pubescent ; leaves lanceolate, acute, coarsely-toothed, often blotched with purple ; 

 the uppermost linear and nearly entire ; fruit nearly sessile, acute at both ends, 

 sharply 3 -4-angled. — Dry old fields and sandy places near the coast, Florida to 

 North Carolina, and westward. June -August. (2) — Stem 2° - 3° high. 

 Flowers white. 



3. G. filipes, Spach. Pubescent and somewhat hoary, becoming smooth- 

 ish ; stem slender, paniculately branched; leaves linear, toothed, wavy; fruit 

 ovoid, obtuse, sharply 4-angled, on slender pedicels. — Dry pine barrens, Florid* 

 to South Carolina, and westward. July - Sept. (g) ? — Stem 2° - 3° high, vet) 

 leafy. 



2. OENOTHERA, L. Evexixg-Piumkose. 



Calyx-tube produced beyond the ovary ; the limb 4-lobcd, reflexed and decid- 

 uous. Petals 4. Stamens 8. Stigma 4-lobed. Capsule 4-valvcd, many-seeded. 

 — Herbs, with alternate leaves, and axillary or racemose chiefly yellow flow- 

 ers. Pollen-grains triangular, connected by cobwebby hairs. 



* Capsule cylindrical, sessile: flowers expanding at night : annuals or biennials. 



1. CE. biennis, L. Hairy, hirsute, or smoothish ; stem tall, often simple ; 

 leaves lanceolate and ovate-lanceolate, acute, wavy mid toothed or serrate on the 

 margins; the earliest ones sometimes pinnatifid; spikes leafy, at length elon- 

 gated; calyx-tube longer than the lobes ; flowers large. (CE. muricata, Purth. 

 CE. grandiflora, Ait.) — Fields and waste places, everywhere. June- Sept. — 

 Stem 2° -4° high. Varies greatly in pubescence and size of the flower. 



2. CE. sinuata, L. Hairy or downy ; stems ascending or diffuse; leaves 

 oblong, pinnately lobed, the lowest pinnatifid; flowers small, axillary; calyx 

 and capsule hairy. Passes through several intermediate forms into Var. in mi- 

 n sa, Tom & Gray. Stems prostrate, hoary; leaves small, lanceolate, spar- 

 ingly toothed or entire 1 . — Fields and waste places, common; the variety in 

 drifting Band along the coast May-Sept. — Stems 2' -2° high. 



* * Capsule obooate or claxate, furrowed, and more or /<ss peduncled : flowers ex- 

 panding in sunshine. 



3. CE. glauca, Michx. Smooth and somewhat glaucous; leaves sessile, 

 oblong-ovate, wavy-denticulate, acute; racemes few-flowcrcd, leafy; flowers 

 large; capsule ovoid-oblong, 4-winged, Capering into a short pedicel. ((E. 

 Fraseri, Pvrth.) — Mountains of Georgia, North Carolina, and Tennessee. May 



