ONAGRACE^E. 81 



2. C. autumna'lis. Growing under water. May be dis- 

 tinguished from C. verna by its leaves being refuse and all 

 linear from a broader base, and its flowers without bracts. 



ORDER XXXVII. ONAGRA'CE^E. (EVENING-PRIMROSE F.) 



Herbs with perfect and symmetrical flowers, the parts of 

 the latter in twos or fours. Calyx-tube adherent to the 

 ovary, and usually prolonged above it. Petals and stamens 

 inserted on the calyx. Style 1. Stigmas 2 or 4 or capitate. 

 (See Part I., sections 4447, for description of a typical 



plant.) 



Synopsis of the Genera. 



1. Circae'a. Petals 2, obcordate. Stamens 2. Stigma capitate. Fruit 



bur -like, 1-2 -seeded, beset with hooked bristles. Delicate low plants 

 with opposite leaves and very small white flowers in racemes. 



2. I'.pilu IMIIIII. Petals 4. Stamens 8. Calyx-tube hardly prolonged 



beyond the ovary. Fruit a linear pod, many-seeded, the seeds pro- 

 vided with tufts of downy hairs. 



3. <Euothe'ra. Petals 4. Stamens 8. Stigma 4-lobed or discoid. 



Flowers yellow (white in one species). Calyx-tube much pro- 

 longed. Pods cylindrical or club-shaped. Seeds without tufts. 



4. Gaii'ra. Petals 4, clawed and unequal. Stamens 8. Stigma 4-lobed, 



with a cup-like border. Calyx-tube much prolonged. Fruit hard 

 and nut-like, ribbed, indehiscent or nearly so, few-seeded. 

 Flowers rose-coloured or white, turning scarlet. 



5. Ludwlg'la. Petals 4, or none. Stamens 4. Calyx-tube not pro- 



longed. Stigma capitate. 



1. CIRC:'A, Tourn. ENCHANTER'S NIGHTSHADE. 



1. C. Lutetia'na, L. Stem 1-2 feet high. Leaves oppo- 

 site, ovate, slightly toothed. No bracts under the pedicels. 

 Fruit roundish, bristly-hairy, 2-celled. Rich woods. 



2. C. alpi'na, L. Stem low and delicate (3-8 inches). 

 Leaves cordate, coarsely toothed. Minute bracts under the 

 pedicels. Fruit club-shaped, soft-hairy, 1-celled. Deep low 



woods. 



2. I.IMI.O irn 11. L. WILLOW-HERB. 



1. E. angustifo'lium, L. (E. spica'tum, Lam.) (GREAT 

 WILLOW-HERB.) Stem 3-6 feet high, simple. Leaves lance- 

 olate, scattered. Flowers purple, very showy, in a terminal 



