Onagraceae. Evening Yimrose Family, 
Herbs or rarely shrubs with alteryate or opposite Simple leaves, 
without stipules. Flowers perfect, symetrical, axillary or in racemes, mostly 
4-parted, commonly sessile, the inferidt elongate ovary appearing as a pedicel. 
Sepals 2-6,usually 4,the tube of the calyx commonly prolonged above the infer- 
ior ovary. Petals usually 4, convolute in the bud, sonetines wanting. Stamens 
as many or twice as many as the sepals., Pistil of usually 4 carpels, 2 or 4 
' 
chambered. Sarda offi uth a Lust 4 Aft ve ( tema). 
O Sepals and petals 2; fruit 2 mme long, 
4 obovate, indehiscent, covered with hooked bristles . Circaea 
o Sepals and petals 4; fruit .5-8 cm. long, linear 
f or narrowly oblong, not covered with hooked bristles 
‘. Petals yellow; pods 4-5 mm. in dismetor 2, Oenothera 
Petals rose-purple or pins, rarely bluish or white 
-{] Seeds with a tuft of silky hairs at one end; 
© pods 125-8 cm. long 
& Calyx tube prolonged above the ovary 1 mm. 
/o Or more; petals 2-6 mm. long 3. Epilobiun 
(, Calyx tube not prolonged above the ovary; 
(O petals 1-2 cm. long 4. Chamaenerion 
— 
4 Seeds without « tuft of silky hairs at the end; 
Rm pets 25-2 cm. long 
Capea AA 
6 Petals 1.5-6 mm. long; pods .5-1 cm. long 
(: Calyx tube prolonged above the ovary; petals 
2d Bed-6 mme longs, leaves several millimeters 
* \\broad SX Boisduvallia 
« Calyx tube not prolonged above the ovary; 
petals 1.5=2.5 mm. long; leaves linear, 
'  1=2, rarely 3 mm. broad 6. Gayophytun 
', Petals 1-2 om. long; pods 1.5-2 cm. long 7, Clarkia 
Steers _ 
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