ONAGRACE^. 109 



ments 4, reflexed. Petals 4, equal. Stamens 8. Stigma 4- 

 lobed or capitate. Capsule 4-valved, many-seeded. Seeds 

 naked. 



* Capsule elongated, 4t-side(l, sessile. 



1. CE. biennis Linn. : stem erect, mostly simple, usually hairy; leaves 

 alternate ovate-lanceolate, repandly denticulate, acute, pubescent, lower 

 ones on short petioles ; capsule sessile, obtusely 4-angled, somewhat turgid. 

 CE. muricata Mitrr. (E. parvijiora Linn. (E. grandijlora Ait. 



Fields. Subarct. Amer. to Flor. W. to Ark. and Oregon. June, Aug. (1) 

 and @, — Stem 2 — 5 feet high. Flowers yellow, variable in size, in a terminal 

 leafy spike 3 — 12 inches long. Petals obcordate. 



Common Evening Primrose. 

 ■ 2. CE. sinuaia Linn. : pubescent or villous ; stem ascending or decum- 

 bent ; leaves oblong or lanceolate, nearly entire, sinuate-toothed or pinna- 

 tifid; calyx and ovary villous; capsule cylindric or somewhat prismatic, 

 elongated. CE. minima Pursh. 



Sandy fields. N. J. to Flor. W. to Miss. May, June. %..—Stem 1—6 

 inches high, simple or branching from the base. Flowers small, axillary, sessile, 

 pale yellow. Petals obcordate. Sinuate-leaved Evening Primrose. 



** Capsule obovate-clavate, angular, viostly pedicellate. 



3. CE. fruticosa Linn. : hairy or nearly smooth ; stem erect, simple or 

 branched ; leaves lanceolate or oblong-lanceolate, slightly toothed ; petals 

 obcordate; capsules oblong-clavate, 4-winged, longer than the pedicels. 

 CE. ambigua Spreng. CE. hybrida Mich. CE. incana Nutt. 



Shady woods. N. Y. to Flor. W. to Ohio. July. %.—Stem 1—3 feet 

 high. Leaves sessile or slightly petioled. Flowers large, pale yellow, in a pe- 

 duncled corymb. Varies much in the amount of pubescence. Sun Drop. 



4. CE. riparia Nutt. : slightly pubescent ; leaves linear-lanceolate, acute, 

 attenuate at base and somewhat petioled, remotely denticulate or entire ; pe- 

 tals slightly obcordate ; capsules subsessile, oblong-clavate, sometimes shorter 

 than the pedicels, slightly 4-winged, with 4 intermediate ribs. 



Swamps and banks of streams. Quaker Bridge, N. J. to Flor. June, July. 

 @. — Stem 2 — 3 feet high, often vigately branched. Leaves rather thick, some- 

 what pubescent on the midrib and margin. Flowers large, yellow, somewhat 

 produced towards the summits of the branches. Swamp Evening Primrose. 



5. CE. limaris Mich.: stem erect or decumbent at base, slender and 

 often branched ; leaves narrow-lanceolate or linear, remotely denticulate or 

 entire, tapering at base ; capsule clavate, turbinate or obovate, mostly pu- 

 bescent or canescent, with the alternate angles sUghtly winged above. 



Dry sandy grounds. Montauk Point, Long Island, N. Y. (the decumbent 

 variety. Torr. ^ Gr.) to Flor. and Louis. A;^il— July. 1\.. 1—Stem 10 inches 

 to 2 feet high. Flowers rather large, yellow, somewhat corymbose at the ex- 

 tremity of the branches, but not in an elongated spike like those of CE. pumila. 



Narrow-leaved Evening Primrose. 



0. CE. chrysantha Mich. : pubescent ; stem ascending ; leaves lanceolate, 

 rather obtuse, entire or slightly toothed, the radical ones obovate-spatulate ; 

 petals broad-obovate, emarginate ; capsule clavate-oblong, pedicelled, the 

 alternate angles narrowly winged. 



Rocky grounds. Hudson's Bay to near Niagara Falls. June, July. @. ? 



