352 Order 52.— ONAGRACEyE. 



1 J. decurrens DC. Glabrous ; fls. A-vierous ; sts. erect, with slender branches 

 and winged by the decurrent lvs. ; lvs. lanceolate, sessile; caps, clavate, 4-angled, 

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

 lobes. — U In swamps, Va. to Fla. and La., common. Sts. G 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; lvs. 

 elliptical, the lower spatulato, acutish, short-petiolcd ; fls. large; ova. slender, 

 shorter than tho pedicels; sep. lanceolate, acute. — If Bogs and ditches, S. Oar. 

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

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



3 J. leptocarpa Nutt. Hirsute; fls. vnostly G-vierous, small; st. erect; lvs. 

 lanceolate, subsessile ; caps, linear, much longer than the pedicd, crowned with tho 

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

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



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

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

 shorter than the long pedicel, with 2 bracteoles at base. — H Ponds, La,, Ark. 

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



3. (ENOTHE'RA, L. Evening Primrose. (Gr. olvoc, wine, O-qgdo), 

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

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

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

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

 without a coma. — Herbs with alternate lvs. Fls. yellow. 



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



§ Fls. diurnal. — Calyx tube not longer than tho ovary Nos. 4, 5 



— Calyx tubo about twice longer than the ovary Nos. 6—3 



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



1 CE. biennis L. St. erect, hirsute; lvs. ovate-lanceolate, repand-denticulate ; 

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

 stam. shorter than tho obcordate or obtuse petals; caps, oblong, obtusely 4-angled. — 

 ;.f) and @ Common in fields and waste places, U. S. and Lrit. Am. St. mostly 

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

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

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



ji. MUBIOATA. St. niuricate 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. \ (CE. grandiflora Ait.) 

 &. pauvifl6ra. Petals small, about as long as tho stamens ; tubo of tho cal. 



elongated. (CE. parviflora L.) 

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



Nutt.) 

 £ canescens Torr. & Gr. Petals enlarged; whole plant canesccntly hairy. — 



Iowa, etc. 



2 CE. rhombipetala Nutt. Tall, erect ; lvs. lance-linear, sessile, acute, spread- 

 ing, lower ones pstiolate, becoming somewhat pinnatifid ; spiko strict, lb. largo, 

 longer than tho leafy bracts ; cal. tubo very slender, 3 or 4 times longer than tho 

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

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

 yellow fls. Jn. 



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

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

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

 prismatic. — <D 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. 



(i. minima Nutt. Low, simple, 1 -flowered; lvs. nearly entire. — Pino barrens, 

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



