138 ONAGRACE^. (eVENING-PRIMROSE FAMILY.) 



6-8. Style declined : stigma 4-lobed. 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 loug-peduneled 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 ?oil, Georgia to 

 Tennessee, and northward. July and August. (2, — Stem 3° - 8° high. Spikes 

 compound. 



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

 pubescent ; leaves laiuioiate, acute, coarsely-toothed, often blotched with pui^jle ; 

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

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

 North Carolina, and westward. June - August © — 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-angIed, on slender pedicels. — Dry pine barrens, Florida 

 to South Carolina, and westward. July - Sept. @ ? — Stem 2° - 3° high, very 

 leafy. 



2. CENOTHERA, L. EvENixG-rniMROSE. 



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

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

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

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



* Capsule ajlindiical, 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 and toothed or seiTate on the 

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

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

 CE. grandiflora, >4/V.) — Fields and waste places, everywhere. June -Sept. — 

 Stem 2° - 4° high. A'^aries greatly in jiubescencc and size of the flower. 



2. CE. sinuata, L. Hairy or downy ; stems ascending or diH'usc ; leaves 

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

 and capsule hairy. I'asses through several intenncdiate forms into Var. HUMI- 

 FD.SUM, Torr. &, CJray. Stems prostrate, hoary ; leaves small, lanceolate, spar- 

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

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



♦ * Capsule obovate or davatc, furrowed, and more or less pidunr.lcd : Jlouirs ex- 

 jianding in sunshine. 



3. CE. glauca, Mi<hx. Smooth and somewhat glaucous ; leaves sessile, 

 oblong-ovate, wavy-denticulate, acute; racemes few-flowend, leafy; (lowers 

 large ; cap«ule ovoid.f)bloTig, 4-wingcd, tajx-ring into ii short p( trK-cl. ((E. 

 Frascri, Pursh.) — Mmintains of Georgia, North Carolina, and 'rennessee. May 



