262 Onagraceae 



epigynous or perigynous disk. Ovary 1-6-celled, usually 

 4-celled ; styles united ; stigma capitate, discoid or 

 4-lobed ; ovules many in each cell. Fruit usually a 

 capsule. Seeds mostly small, sometimes with a coma ; 

 endosperm scanty or none ; embryo straight. 



Calyx- tube not produced above the ovary, its lobes persistent 



1. JUSSIAEA. 

 Calyx-tube usually produced above the ovary, the free portion and lobes 



deciduous. 

 Seeds comose. 



Flowers showy, scarlet. 2. ZAUSCHNERIA. 



Flowers small, white or purplish. 3. EPILOBIUM. 



Seeds naked. 



Anthers attached at or near the base and remaining erect. 



Flowers minute ; calyx-lobes erect. 4. BOISDUVALIA. 



Flowers showy ; calyx-lobes erect or united at the tip and turned to 



one side in anthesis. 



Petals distinctly clawed. 5. CLARKIA. 



Petals sessile. 6. GODETIA. 



Anthers attached in the middle and versatile. 

 Capsule 4-celled. 



Stigma 4-lobed; calyx-tube much exceeding the capsule. 



7. ONAGRA. 

 Stigma capitate. 



Calyx-tube with a lobed disk at the throat. 



8. EULOBUS. 

 Calyx-tube naked at the throat. 9. SPHAEROSTIGMA. 



Capsule 2-celled; flowers minute. 10. GAYOPHYTUM. 



1. JUSSIAEA L. 



Perennial herbs with alternate, usually entire leaves, 

 and white or yellow axillary solitary flowers. Peduncles 

 mostly 2-bracted at the summit. Calyx-tube elongated, 

 cylindric or prismatic, adnate to the ovary but not pro- 

 longed beyond it, the limb 4-6-lobed, the lobes acute, per- 

 sistent. Petals 4-6, rarely more, inserted under the 

 margin of the disk. Stamens 8-12 in 2 rows, inserted 

 with the petals ; filaments short. Ovary 4-6-celled ; 

 stigma 4-6-lobed ; ovules many. Capsule linear, oblong 

 or club-shaped, angular or ribbed, septicidally dehiscent. 

 Seeds numerous. 



1. J. Californica (Wats.) Jepson. Perennial; stems stout, 

 3-12 dm. long, floating or nearly prostrate on mud; leaves obo- 



