ONAGRACE.E. (EVENING-PRIMROSE FAMILY.) 161 



angled, mostly 1-celled, 1 -4-seeded. Herbs with alternate leaves, arid white 

 ur purple flowers in a long-peduncled raceme or spike. 



1. G. biennis, L. Sof t-hairy ; leaves obloug-lauceolate, 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 - August. Stem 3-8 high. 

 Spikes compound. 



2. G. longiflora, Spach. Canescent-puberulent ; stem pauiculately 

 branched ; leaves lanceolate, acute, wavy-denticulate, sessile ; spikes pauicled ; 

 calyx lobes longer than the tube, and the long-clawed white petals ; fruit ses- 

 sile, ovate, obtuse, sharply 4-augled. Dry soil, North Georgia and Ala- 

 bama. July. Stem 4- 6 high. Fruit 2" long. 



3 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. June- August. (2) Stem 2 -3 high. Flowers white. 



4. G. fllipes, Spach. Pubescent and somewhat hoary, becoming sniooth- 

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

 ovoid, obtuse, sharply 4-angled, on slender pedicels. Dry pine barrens, Flor- 

 ida to South Carolina, and westward. July - Sept. ? Stem 2- 3 high, 

 very leafy. 



2. CENOTHERA, L. EVENING-PRIMROSE. 



Calyx tube produced beyond the ovary ; the limb 4-lobed, reflexed and de- 

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

 seeded. Herbs, with alternate leaves, and axillary or racemose chiefly yel- 

 low flowers. Pollen grains triangular, connected by cobwebby hairs. 

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



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

 ple; leaves lanceolate and ovate-lanceolate, acute, wavy and toothed or serrate 

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

 elongated; calyx tube longer than the lobes; flowers large. Fields and 

 waste places, everywhere. June -Sept. Stem 2 -4 high. 'Varies greatly 

 in pubescence and size of the flower. 



2. CE. heterophylla, Spach. Hirsute; stem 2 -4 high, branching; 

 earliest leaves tufted, oblanceolate, pinnately 12-20-lobed, the upper smaller 

 and entire ; flowers few, terminal, often tripetalous ; petals rhombic-ovate ; 

 capsule curved. Valley of Flint River, Bainbridge, Georgia. July. 



3. CE. humifusa, Nutt. Densely canescent-pubescent ; stem mostly de- 

 cumbent and branching, l-Hlong; leaves lanceolate or wedge-obvate, 

 mostly entire, ' - H' long, nearly sessile; calyx villous ; style slightly ex- 

 serted ; capsule mostly curved, ' long. ((E. sinuata, var. Torr. $ Gray.) 

 Sandy coast. July - Nov. Root mostly perennial. 



4. CE. sinuata, L. Annual, pubescent ; stem rigid, erect or diffuse, 

 simple or branched, 2'-l high; leaves lanceolate or oblong, toothed or pm- 



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