VASCULAR PLANTS. 105 



Family LXXII. Onagraceae. 



Calyx-tube adnate to the ovary. Petals al- 

 ternate with them, not valvate in aestivation. 

 Stamens inserted with petals, as many or a mul- 

 tiple; anthers introrse. Placentae central, 

 oo-ovulate. Style 1. Stipules 0. 



1. Jussiaea, L- 



Calyx-tube not prolonged beyond the ovary, 

 but forming an epigynous disk; lobes 4 — 6 per- 

 sistent. Petals as many. Stamens twice as 

 many. Loculi of the ovary as many as the ca- 

 lyx-lobes; stigma capitate. Fruit a septicidal 

 capsule. 



71, aquatic; flowers yellow; leaves alternate. 



2. Zauschneria, Presl. 



Calyx-tube prolonged considerably above the 

 ovary, funnel-shaped, colored, with 4-lobed, de- 

 ciduous limb. Petals not exceeding the calyx- 

 lobes, 2-cleft, erect. Stamens 8, included. Ovary 

 4-locular, 4-valved. Seeds with a hairy crown. 

 Fruit a capsule, linear. 1-locular, oo-seeded. 



It. flowers scarlet; upper leaver alternate. 



3. Epilobium, L- 



Calyx-tube prolonged but little beyond the 

 ovary; limb 4-parted soon deciduous. Petals 

 as many, obovate, or obcordate, inserted into 

 an annular disk on the summit of the calyx- tube. 



