138 ONAGRACE^. (eVENING-PRIMROSE FAMILY.) 



6-8. Style declined : stigma 4-lobed. Ovary 3-4-celled. Fruit 3 - 4-angIed, 

 mostly l-ccUed, 1 -4-seeded. — Herbs with alternate leaves, and while or purple 

 flowers in a long-peduncled 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 spanngly 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, 

 shai-ply 3-4-anglcd. — 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, Florida 

 to South Carolina, and westward. July - Sept. (f) 1 — Stem 2° - 3° high, very 

 leafy. 



2. CENOTHERA, L. Evening-Primrose. 



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 cylindrical, sessile: flowers expanding at niyht : annuals or biennials. 



1. CEj. biennis, L. Hair}', hirsute, or smoothish ; stem tall, often simple ; 

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

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

 gated ; Ciilyx-tube longer than the lobes ; flowers large. (<SL. muricata, Piirsh. 

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

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



2. OS. 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 intei-mediate forms into Var. humi- 

 FUSA, Torr. & Gray. Stems prostrate, hoary; leaves small, lanceolate, spar- 

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

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



* * Capsule obovate or cluvate, furrmved, and viore or less peduncled : flowers ex- 

 panding in sunshine. 



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

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

 large ; ca])sulc ovoid-oblong, 4-winged, tapering into a short pedicel. {CE. 

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



