138 ONAGRACEJ2. (EVENING-PRIMROSE FAMILY.) 



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

 mostly 1-celled, 1 -4-seeded. Herbs with alternate leaves, and white 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, (g, Stem 3 r 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 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. (f) ? Stem 2 - 3 high, verj 

 leafy. 



2. CENOTHERA, L. EVENING-PRIMROSE. 



Calyx-tube produced beyond the ovary ; the limb 4-lobed, reflexed 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 niylit : 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 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, Pursh. 

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

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



2. (E. 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. 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 clavate, furrowed, and mare 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 ; capsule ovoid-oblong, 4-winged, tapering into a short pedicel. (CE. 

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



