Ordeb 53.— evening PRIMROSES. 211 



♦ Flowers 2-piirted, with 2 sepals, 2 petals, &c f 



* Flowers 1-parted, 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 

 8 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 Seedcomouswitha tuft of silky hairs. Fls. purplish. Willoiv Herb. Epilo^bium. 1 

 a Seed not comous, &c. Fls. large, yellow. Southern. Yellow Jessie. Jussle^a. 

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



Evening Primrose. CEnothe'ra. 2 



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



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



c Shrubs from Chili. Cal. tube long, enlarged. Fls. hanging. Bar-drop. Fuch'sia. 



d Petals yellow, sometimes minute orO. Lvs. entire. Seed Box. Ludwig'ia 



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



Water Milfoil. Myriophtl'lum. 

 f Delicate herbs with small, ]>ale flowers. Brichantei'^s Nightshade. Circ^''a. 8 

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

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



1. EPILO'BIUM. Willow-herb. 

 Calyx tube not prolonged above the ovary. 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. Narrow-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. Flowers large, all parts pale purple or white, 

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

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

 shaped, undivided pistil, we omit. 



2. CENOTHE'RA. Evening Primrose. 



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

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

 calyx tube. Stara.ens 8. Capsule 4-celled, 4-valved. Stigma 4-lobed. 

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

 the following species), May., Aug. 



