(Enothera. LV. ONAGRACEiE. 363 



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

 obcordate, twice longer than calyx; sttj. included; stiu;. clavate; caps, pubes- 

 cent. — In swamps and marshes, Penn. to Artie Am., W. to Orej^on. Stem I — 

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

 tire, or with" a lew minute teeth, l-'htwers numerous, axillary. Petals rose- 

 color. Capsules 1 — 2' long, on short pedicels. Aug. 



/?. albijlorum. Lehm. (E. lineare. MulU.) St. slender, at first simple, 

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



4. E. MOLLR. Torr. (E. strictum. Muhl) Soft Epilolfinm. 



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

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

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

 the calyx ; sfii,'. laVge, turbinate ; caps, elongated, subscssile. — Swamps, Mass. 

 to N. J., rare. Stem 1— -21' high. Leaves numerous, 8 — 15" by 1 — 4". Flow- 

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



5. E. ALPiNUM. 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. moUe, 

 reddish-white. 

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



2. OENOTHERA. 



Gr. oivoi, wine, bqpoi, 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 loith alternate leaves. 



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



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

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

 shorter than petals ; ca.ps. oblong, obtusely 4-angled. — (i) and ^ Common in 

 fields and waste places, U. S. and British Am. Stem mostl)^ simple, 2 — 5f 

 high, with whitish, scattered hairs. Leaves 3 — G' by ^ — U', 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. (Qil. muricata. Ph.) St. muricate or strigosely hirsute, red; 

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



y. grnmlljiora. (CE. grandiflora. Alt.) Pel. much longer than the stamens, 

 rather deeply obcordate. Stem branched, f 



2. OE. FRUTicosA; Perennial Evening Primrose. 



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

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

 — %. In sterile soils, Mass., Ct., N. Y. toFlor. 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. Flov.-ers few 

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

 tube longer than the ovary. Petals broad-obcordate, 3'ellow. Jn. — Aug. 

 /8. ambigua. Lvs. membranaceous ; pet. longer than broad. 



3. CE. PUMiLA (& CE. pusillal Michx.) Dwarf Evening Primrose. 

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



at base; spike loose, leaf}^, naked below; calyx tube shorter than the subse.ssile, 

 oblong-clavate, angular ovary. — (§) A small, halt-erect plant, common in grass 

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

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

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

 23 



