cenothera. onagracej:. 235 



eels. — Linn. sp. 1. p. 456 ; Bot. mag. t. 332 ; Pursh, fl. \. p. 262 ; Nutt. gen. 1. p. 247 ; 

 Ell. sk. I. p. 442 ; Torr. fl. I. p. 389 ; DC. prodr. 3. p. 50 ; Hook. fl. Bor.-Am. 1. p. 212, 

 and bot. mag. 3548 ; Beck, hot. p. 118 ; Darlingt.fl. Cest. p. 241 ; Torr. <^ Gr.fl. N. Am. 

 1. p. 496. CE. hybrida, Miclix. fl. I. p. 225. CE. ambigua, Spreng. syst. 2. p. 229; DC. 

 I. c. CE. incana, Nutt. I. c. 



Biennial? Stein 1^-2 feet high, rigid, mostly purplish, with slender erect branches, 

 variable in pubescence, sometimes villous, and often nearly smooth. Leaves 1^-3 inches 

 long and 3-7 lines wide ; the lower ones with short petioles. Flowers about an inch and a 

 half in diameter, in corymbose spikes at the summit of the stem and branches. Calyx pur- 

 plish ; the tube about an inch long : segments acuminate, more or less united. Petals pale 

 yellow, broadly obcordate. Style longer than the stamens, and shorter than the corolla. 

 Capsule about twice as long as the pedicels ; the angles distinctly winged, and decurrent on 

 the pedicel : intermediate ribs rounded, slightly projecting. 



Fields, meadows and borders of woods ; rather common. June - July. Variable in size, 

 breadth of the leaves and pubescence, according to the soil, degree of exposure, etc. It appears 

 to be only a biennial. 



3. CEnothera linearis, Michx. Narrow-leaved Evening Primrose. 



Stem erect, slender ; leaves linear or narrowly lanceolate, rather obtuse, remotely denticu- 

 late or entire ; flowers somewhat corymbose at the extremity of the branches ; tube of the 

 calyx longer than the ovary, but scarcely exceeding the segments ; petals longer than the 

 stamens and calyx-segments ; capsules clavate-turbinate or obovate, mostly pubescent or 

 canescent, with the alternate angles slightly winged above, tapering at the base into a slender 

 pedicel.— Michx. fl. 1. p. 225 ; Pursh, fl. I. p. 262; Nutt. gen. 1. p. 248 ; Torr. ^ Gr. 

 fl. IV. Am. 1. p. 497. 



var. : stems often decumbent at the base, finally much branched ; leaves smaller. Torr. A- 

 Gr. I. c. 



About a foot high, often decumbent at the base ; the whole plant more or less canescently 

 puberulent. Leaves varying from linear to linear-oblong, tapering at the base, and slightly 

 petioled. Flowers twice as large as in CE. pumila. 



Dry sandy fields, Suffolk county. Long Island. August. 



4. CEnothera ciirysantha, Michx. Golden-Jiowered Evening Primrose. 



Pubescent ; stem ascending ; leaves lanceolate, rather obtuse, attenuate at the base, entire 

 or obscurely denticulate, the radical ones obovate-spatulate ; flowers (small) in a rather 

 crowded spike ; tube of the calyx as long as the ovary, and longer than the segments ; petals 

 broadly obovate, emarginate, longer than the stamens ; capsules nearly smooth, clavate- 

 oblong, distinctly pedicelled, the alternate angles very narrowly winged. — MicJuc.fl. \.p.22o; 

 Pursh, fl.l. p. 263 ; Ell. sk. 1. p. 444 ; Torr. ^ Gr. fl.N. Am. 1. p. 498. 



30* 



