OXAGRACE^. (evening-primrose FAMILY.) 161 



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

 or purple flowers in a long-pediincled 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-augled, acuminate at both ends, sessile. — Dry soil, Georgia 

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

 Spikes compound. 



2. G. longiflora, Spach. Canescent-pubemlent ; stem paniculately 

 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-angled. — 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. @ — Stem 2^-3° high. Flowers white. 



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

 ish; stem slender, ])auiculately branched; leaves linear, toothed, wavy; fruit 

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

 ida to South Carolina, and westward. July - Sept. (§) ' — Stem 2° - 3° high, 

 very leafy. 



2. CEWOTHERA, 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 cijUndrical, sessile: flowers expanding at night: annuals or biennials. 



1. CB. 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. Hir.sute; 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. 0E3. humifusa, Nutt. Densely canescent-pubescent ; stem mostly de- 

 cuml)eut and branching, l°-H°longj leaves lanceolate or wedge-obvate, 

 mostly entire, I'- li' long, nearly se.ssile ; caly.x villous; style slightly e.x- 

 serted ; capsule mostly curved, f long. (CE. 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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