OiiDEi; 52.— EVENING PRIMROSES. 203 



* Flowers •2-piirled, witli 2 sepals, 2 petals, &c f 



* Flowers l-purte<l, with 1 stamen, 1 pistil, 1 seed (no petal)... .h 



2 Flowers perfect (that is, having both stamens and pistils) 3 



2 Flowers monoecious (some with stamens, some with pistils) e 



3 Stamens 8, twice as many as the sepals 4 



3 Stamens 4, same number as the sepals. . . .d 



4 Calyx tube much prolonged above the ovary 5 



4 Calyx tube not prolonged above the ovary a 



5 Garden exotics, with showy purple flowers c 



5 Wild, native herbs, rarely cultivated b 



a Seed comous with a tuft of silky hairs. Fls. purplish. Willow lie rl. EpiLo'uruM. 1 

 a Seed not comous, &c, Fls. large, j^ellow. Southern. Yellow Jessie. JassijE^A. 

 b Petals equal, not clawed, yellow\ Pods oo-seeded. 



Eve.nvig Primrose. (Exothe''iia, 2 



b Petals hardly equal, clawed, red. Pods 1-4-seeded. Gaura. Gaura. 



c Herbs from California. Calyx tube short. Petals clawed. Glarkia. Clar'kia. 



c Shrubs from Chili. Cal. tube long, enlarged. Fls. hanging. Ear-drop. Yxi^w'^ix. 



d Petals yellow, sometimes minute or 0. Lvs. entire. Seed Box. Lcuwig'ia 



e Petals greenish or none. Leaves many-cleft. Water-plants. 



Water Milfoil.. MYRiopiiyL'LUM. 

 -f Delicate herbs with small, pale flowers. Enchanter'' s Nightsliade. Circ^'a. 8 

 g Small herbs in wet places, with pinnatifid lvs. Mermaid Weed. Proserpixa'ca. 

 h In water, rare. Leaves linear, whorled. Mare's Tail. IIippu'ris. 



1. EPILO'BIUM. Willow-herb. 

 Calyx tube not prolonged above the ovaiy. Limb deeply 4-parted, de- 

 ciduous. Petals 4. Stamens 8. Stigma often with 4 spreading lobes. 

 Ovary and capsule linear, 4-cornered, 4-celled, 4-valved. Seeds crowned 

 with a tuft of long hairs. — U Flowers purplish or white. 

 E. angustifo'lium. Karrow-leaved Willow-herb. Rose-hay. A tall, showy herb (4- 

 6f. high), common at the North. Leaves narrow-lanceolate, nearly entire, with 

 a vein running along the margin. F'lowers large, all parts pale purple or white, 

 in a long, terminal spike. Style and stamens declined. Stigma with 4 long 

 lobes. Julu, Aug. Our four other species, with small flowers, and a club- 

 Bhaped, undivided pistil, we omit. 



2. (ENOTHE'RA. Evening Primrose. 

 Calyx tube prolonged beyond the ovary, deciduous: segments 4, re- 

 flexed. Petals 4, equal, obcordate or obovate, inserted into the top of the 

 calyx tube. Stamens 8. Capsule 4-celle(l, 4-valvcd. Stigma 4-lobed. 

 Seeds not tufted. — Ilcrbs with alternate leaves, and yellow flowers (in all 

 the following species). May ^ Aug. 



