ONAGRACE^E. J 33 (ENOTHERA. 



purple, numerous, in long, terminal, erect racemes. Petals unequal, with 

 claws. Stamens unequal in length, declining. Style longer than the sta- 

 mens, on a long, linear ovary, which when ripened, discloses numerous seeds 

 winged with long, silky down. Rose-bay. Willoio-herh. 



2. E. colora'tum. 



Stem round, puberulent; /cares lanceolate, serrulate, petioled, opposite, up- 

 per ones alternate, smooth, veiny. Found in wet grounds. Stem 1 — 3 feet 

 high, becoming very much branched. Leaves with red veins, on short, decur- 

 rent petioles, conspicuously covered with whitish dots. Flowers axillary, 

 regular, purple, on very long ovaries. Jl. Aug. Per. Colored- Willow-herb. 



3. E. PALU'STRE. 



Stem round, minutely pubescent; leaves subsessile, lanceolate, subdenticu- 

 late; stigma undivided. In marshes. Stem 2 — 3 feet high, very branching, 

 with alternate, slightly toothed leaves. Petals obcordate, rose-color, about 

 .twice as long as the calyx, on an ovary longer than tJie leaves. Jl. Per. 



Marsh- Willow-herb. 



p. albijlorum. (E. lineare. M). Store slender, at first simple, branched at 

 top; leaves linear, entire, revolute at the margin; capsules canescent. 



4. E. alpi'num. 



Stem 1 — 2-flowered, simple, roundish ; learcs opposite, elliptical, entire. 

 Mountains. Stem decumbent, a few inches long, with about 2 rose-colored 

 flowers, and obtuse, short-stalked leaves. Jn. Jl. Per. Alpine Willow-herb. 



5. E. MOLLE. 



Covered with a soft, thick pubescence like velvet; stem ronnd, straight, 

 branchinor above; Ze«rcs opposite, crowded, linear, obtusish ; petals emargm- 

 ate, double the length of the calyx. Stigma large, clavate. Flowers pale 

 purple or rose-color. Soft- Willow-herb. 



2. CENO'THERA. 



Calyx 4-cleft, tubular, segments reflexed; petals 4, mostly 

 obovale; stamens 8, sometimes equal; capsule 4-celled. 4- 

 valved, inferior; seeds naked. 



Gr. oitoi, wine, and Sigiy, to hunt; because the root when eaten is said 

 to be an incentive to wine drinking, Cal. superior, with a long tube. Pet. 

 inserted into the top of the tube. Fil. awl-sliaped, incurved, shorter than the 

 petals. Stig. divided into 4, obtuse, spreading seg. Seeds many. — Herbs. 



1. (E. bie'nnis. 



Leaves ovate-lanceolate, flat ; stem rather rough and villose ; stamens short- 

 er than the corolla. A tall plant, witli fine straw-colored flowers, common 

 about fences, flowering from July to September. Stem rougli, leafy, fur- 

 rowed, 3 — 5 feet iilgh. Leaves pubescent, slightly toothed, alternate, sessile 

 on the stem, those of the root tapering into a foot-stalk. Flowers numerous, 

 thicklv clustered in terminal spikes. Their mode of expansion is curious. 

 It takes place at evening. When the flower has acquired a suflicient expan- 

 sive force, the calyx suddenly bursts vv'ith a perceptible sound, and instantly 

 expands, allowing the petals to unfold rather more at their leisure. They 

 wither during the following day. Evening Primrose. Scahish. 



M 



