CE.VOTHERA. LV. ONAGRACE^. 263 



ricnlate, smooth, attenuate at base, rather acute, lower ones opposite ; pet. small, 

 obcordate, twice longer than calyx ; sty. included ; stig. clavate ; caps, pubes- 

 cent. In swamps and marshes, Penn. to Artie Am., W. to Oregon. Stem 1 

 2f high, very branching. Leaves mostly alternate, 1 3' long, j as wide, en- 

 tire, < r with a few minute teeth. Flowers numerous, axillary. Petals rose- 

 color. Capsules 1 2' long, oh short pedicels. Aug. 



/?. a'MJlorum. Lehm. (E. lineare. Mnhl.) St. slender, at first simple, 

 branched at top; IKS. linear, entire, margin revolute; capsules canescent 



4. E. MOLLE. Torr. (E. strictum. MM.') S<>Jt Epilobium. 



Plant clothed with a dense, soft, velvet-like pubescence ; st. terete, straight, 

 erect, branching above ; Ivs. opposite (alternate above), crowded, sessile, mostly 

 entire and oblong-linear, obtusish ; pet. deeply emarginate, twice longer than 

 the calyx ; stig. large, turbinate ; caps, elongated, subsessile. Swamps, Mass, 

 to N. J., rare. Stem 1 2f high Leaves numerous, 815" by 1 4". Flow- 

 ers rose-color. Capsules 3' long. Sept. 



5. E. ALPlNUM. Alpine Epilobium. .^ 



St. creeping at base, usually with 2 pubescent lines, few-flowered ; Ivs. 

 opposite, oblong-ovate, subentire, obtuse, sessile or subpetiolate, smooth; stig. 

 undivided ; caps, mostly pedicellate. Mountains, Northern States to Artie Am. 

 Stem 6 12' high. 'Leaves often slightly petiolate and denticulate, lower ob- 

 tuse, middle acute, and upper acuminate. Flowers smaller than in E. molle, 

 reddish- white. 

 /?. natans. Hornem. St. large, nodding at the summit ; Ivs. oblong, denticulate. 



2. CENOTHERA. 

 Gr. oivos, wine, S^pcj, to hunt; the root is said to cause a thirst for wine. 



Calyx tube prolonged beyond the ovary, deciduous, segments 4. 

 reflexed ; petals 4, equal, obcordate or obovate, inserted into the top 

 of the tube ; stamens 8 ; capsule 4-celled, 4-valved ; stigma 4-lobed ; 

 seeds many, naked. Herbs with alternate leaves. 



1. CE. BIENNIS. Common Evening Primrose. Scabish. (Fig. 45.) 



St. erect, hirsute; Ivs. ovate-lanceolate, repand-denticulate ; fls. sessile, in 

 a terminal, leafy spike ; calyx tube 2 or 3 times longer than the ovary; sta. 

 shorter than petals ; caps, oblong, obtusely 4-angled. (I) and (g) Common in 

 fields and waste places, U. S. and British "Am. Stem mostly simple, 2 5f 

 high, with whitish, scattered hairs. Leaves 3 6' by It 7 , roughly pubes- 

 cent, slightly toothed, sessile on the stem, radical ones tapering into a petiole. 

 Flowers numerous, opening by night and continuing but a single day. Petals 

 large, roundish, obcordate. Seeds very numerous, 2 rows in each cell. Jn. Aug. 



/?. muricata. ((E. muricata. Ph.) St. muricate or strigosely hirsute, red; 

 pet. scarcely longer than the stamens. Stem 1 2f high. 



y. grandiflora. (CE. grandiflora. Ait.) Pet. much longer than the stamens, 

 rather deeply obcordate. Stem branched, j- 



2. CE. FRUTICOSA: Perennial Evening Primrose. 



St. pubescent or hirsute ; Ivs. oblong-lanceolate, repand-denticulate ; rat,. 

 leafy, or naked below, corymbed ; caps, oblong-clavate, 4-angled, pedicellate. 

 1\. In sterile soils, Mass., Ct., N. Y. to Flor. and Western States. Stem hard, 

 rigid, (not shrubby) branched, purple, 1 3f high. Leaves variable in pubes- 

 cence, form and size., 1 3' by 3 8", sessile, minutely punctate. Flowers few 

 or many, li' diam. in a terminal, bracteate, mostly pedunculate raceme. Caly I 

 tube longer than the ovary. Petals broad-obcordate> yellow. Jn. Aug. 

 (3. ambigua. Lvs. membranaceous ; pet. longer than broad. 



H. CE. PUMILA (& CE. pusilla 1 ? Michx.) Dwarf Evening Primrose. 



Low, pubescent ; st. ascending ; Ivs. lanceolate, entire, obtuse, attenuate 

 at base ; spike loose, leafy, naked below : calyx tube shorter than the subsessile, 

 oblong-clavate, angular ovary. (g) A small, half-erect plant, common in grass 

 lands, Can. to S. Car. Stem 6 10' long, round, slender, simple. Leaves 1 

 It' by 2 3", radical ones spatulate, petiolate. Flowers yellow, 6" diam., open- 

 ing in succession 1 or 2 at a lime. Jn. Aug. 

 23 



