ORDER 52.—EVENING PRIMROSES. 203 
* Flowers 2-purted, with 2 sepals, ‘2 petals, d&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)....8 
2 Flowers moneecious (some with stamens, some with pistils)....6 
3 Stamens 8, twice as many as the sepals....4 
8 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. W¢llow Herb, Errio’srum. 1 
a Seed not comous, &e. Fls. large, yellow. Southern. Yellow Jessie. Jussiz/a, 
b Petals equal, not clawed, yellow. Pods »-seeded. 
Evening Primrose. CENoTHE/RA. 2 
b Petals hardly equal, clawed, red. Pods 1-4-seeded. Gaura. GauRa. 
ce Herbs from California. Calyx tube short. Petals clawed. Clarkia. Ciar’xta. 
¢ Shrubs from Chili. Cal. tube long, enlarged. Fils. hanging. Zur-drop,. Fucu’sta. 
d Petals yellow, sometimes minute or 0. Lvs. entire. Seed Box. Lupwie’1a 
< Petals greenish or none. Leaves many-cleft. Water-plants. 
Water Milfoil. Myrropnyv’/Lum. 
f Delicate herbs with small, pale flowers. Znchanter’s Nightshade. Circx/a. 
g Small herbs in wet places, with pinnatifidlvs. Mermaid Weed. Prosrrrina’oa. 
h In water, rare. Leaves linear, whorled. Mares Tait. Hirrv’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.—2 Flowers purplish or white. 
E, angustifo/lium, Narrow-leaved Willow-herb. Rose-bay. 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 along, terminal spike. Style and stamens declined. Stigma with 4 long 
lobes. July, Avg. Our four other species, with small flowers, and a club- 
shaped, undivided pistil, we omit. 
eo 
2. G@ENOTHE’RA. Evening Primrose. 
Calyx tube prolonged beyond the cvary, deciduous: segments 4, re- 
flexed. Petals 4, equal, obcordate or obovate, inserted into the top of the 
calyx tube. Stamens 8. Capsule 4celled, 4-valved. Stigma 4-lobed. 
Seeds not tufted Herbs with alternate leaves, and yellow flowers (in all 
the following species). May, Aug. 
