352 OBDEB 52. ONAGRACE^E. 



1 J. dectirrens DO. Glabrous ; fls. 4-merous ; sis. erect, with slender branches, 

 and winged by the decurrent Ivs. ; Ivs. lanceolate, sessile ; caps, clavato, 4-angled, 

 thrice longer than the pedicel, crowned with the lance-ovate, acuminate calyx 

 l k eSt 1{ i n swamps, Ya. to Fla. and La., common. Sts. 6 to 12 to 20' high. 

 Lvs. 2 to 3' long. Fls. showy, expanding about 9". Jl. Sept. 



2 J. grandiflora MX. Hirsute; fls. 5-merous; st. creeping at base, erect; Ivs. 

 elliptical, the lower spatulate, acutish, short- petioled ; fls. large; ova. slender, 

 shorter than the pedicels; sep. lanceolate, acute. 14 Bogs and ditches, S. Car. 

 Ga. (Savannah, Feay and Pond). Creeping stems several feet long, branches 1 to 

 2f high. Ova. with 2 tubercles at base. Fls. expanding nearly 2'. May Aug. 



3 J. leptocdrpa Nutt. Hirsute; fis. mostly 6-merous, small] st. erect; Ivs. 

 lanceolate, sub-sessile ; caps, linear, much longer than the pedicel, crowned with the 

 lanceolate, acuminate sep. (J) Fla. and La. to Mo. St. nearly simple, 1 to 2f 

 high. Caps, nearly 2' long, terete, at length nearly smooth. 



4 J. repens L. Nearly glabrous ; fls. 5-merous, large ; st. creeping, ascending ; 

 Ivs. lance-oval, mostly obtuse, tapering to a slender petiole ; caps, cylindrical, much 

 shorter than the long pedicel, with 2 bracteoles at base. 7J. Ponds, La., Ark. 

 Sts. long creeping and floating. Petioles and pedicels about 2' long. Jn. Aug. 



3. (ENOTHE'RA, L. EVENING PRIMROSE. (Gr. olvo$, wine, Grjpdw, 

 to hunt ; the root is said to cause a tliirst for wine.) Calyx tube pro- 

 longed beyond the ovary, deciduous, segments 4, reflexed ; petals 4, 

 equal, obcordate or obovate, inserted into the top of the calyx tube ; 

 stamens 8 ; capsule 4-celled, 4-valved ; stigma 4-lobed ; seeds many, 

 without a coma. Herbs with alternate Ivs. Fls. yellow. 



Fls. nocturnal (open by night only). Ovary sessile, oblong Nos. 1 3 



Fls. diurnal. Calyx tube not longer than the ovary Nos. 4, 5 



Calyx tube about twice longer than the ovary : Nos. 68 



Calyx tube 3 or 4 times longer than the ovary Nos. 9, 10 



1 OB. biennis L. St. erect, hirsute; Ivs. ovate-lanceolate, repand-denticulate ; 

 fls. sessile, in a terminal, leafy spike; cal. tube 2 to 3 times longer than the ovary; 

 Stam. shorter than the obcordate or obtuse petals ; caps, oblong, obtusely 4-angled. 

 (1) and (D Common in fields and waste places, U. S. and Brit. Am. St. mostly 

 simple, 2 to 5f high. Lvs. 3 to 6' long, roughly pubescent, slightly toothed, ses- 

 sile on the stem, radical ones tapering into a petiole. Fls. numerous, large, open- 

 ing by night and withering the next day. Jn. Aug. 



{3. MURICATA. St. muricate or strigosely hirsute, red ; petals scarcely longer 



than the stamens. St. 1 to 2f high. (CE. muricata Ph.) 

 y. GRANDIFLORA. Petals much longer than the stem, rather deeply obcordate. 



St. branched, f (CE. grandiflora Ait.) 

 6. PARVIFLORA. Petals small, about as long as the stamens ; tube of the cal. 



elongated. (CE. parviflora L.) 

 e. CRUCIATA. Petals linear-oblong, shorter than the stamens. (CE. cruciata 



Nutt.) 

 CANESCENS Torr. & Gr. Petals enlarged; whole plant canescently hairy. 



Iowa, etc. 



2 CE. rhombiptala Nutt. ' Tall, erect ; Ivs. lance-linear, sessile, acute, spread- 

 ing, lower ones petiolate, becoming somewhat pinnatifid ; spike strict, Us. large, 

 longer than the leafy bracts ; cal. tube very slender, 3 or 4 times longer than the 

 sessile ovary ; petals rhombic-elliptical, acute or acuminate ; caps, small. Wis. 

 (Dr. Parry) to Ark. (Prof. Robertson.) A fine species, with a profusion of straw- 

 yellow Us. Jn. 



3 CEJ. sinuata L. St. pubescent, diffusely branched or subsimple, decumbent 

 and assurgent ; Ivs. pubescent, oblong-oval, sinuate-dentate, or incised ; fls. axil- 

 lary, solitary, sessile ; cal. villous, the tube twice longer than the ovary ; caps, 

 prismatic. Fields, N. J. to Ga. and La. St. 3 to 8' long. Lvs. often pinnati- 

 fid. Fls. about 6" diam., pale yellow, turning roseate in withering. 



/3. MINIMA K"utt. Low, simple, 1 -flowered; Ivs. nearly entire. Pine barrens, 

 N. J. to Ga, (CE. minima, Ph.) 



