148 113. OENOTHERACEAE. 



1. Seeds exendospermic. 2 genera 5 species. 

 1. Ovary 1 celled. Fruit a berry. Free central placenta. 



1 MEMECYLON. 

 Ovary more than 1 celled. Fruit capsular. 2 DISSOTIS. 



1. MEMECYLON L. 



1. australe Gilg. and Schltr. Fairfield, Alexandra County, 



2-3,000 ft. 



2. capense E. & Z. Near Umzimkulu. 



2. DISSOTIS Bth. "umFeyankala." "umFeyesele." 



1. princeps Triana. Wet places. Coast and Midlands. 



Common. 



2. incana Triana. Wet places, coast and Midlands. Com- 



mon. 



3. phaeotricha Triana. Wet places. Coast and Midlands. 



FAMILY 113— OENOTHERACEAE. 



Shrubs or herbs. Flowers 2 — 6 merous. Sepals valvate in the 

 bud. Petals free, rarely (Ludwigia) absent. Stamens as many 

 or twice as many as sepals. Ovary inferior or half inferior, 2 — 6 

 celled. Ovules inverted. Style 1. Seeds exendospermic. 5 

 genera 11 species. 



1. Ovary half inferior ; 2 celled with 1 pendulous ovule in each 



cell. Fruit woody, indehiscent. Floating herbs. 



1 TRAPA. 



Ovary inferior, 2 celled with 1 ascending ovule in each cell 



or 3 — 6 celled with numerous ovules. 2. 



2. Flowers with bracteoles, regular. Calyx persistent. 3. 

 Flowers without bracteoles, 4 merous. Calyx deciduous. 4. 



3. Stamens 3—6. 2 LUDWIGIA. 

 Stamens S— 12. 3 JUSSIEUA. 



4. Calyx tube short, bell-shaped. Stamens in 2 rows. Seeds with 



a tuft of hairs. 4 EPILOBIUM. 



Calyx tube long. Stamens subequal. Seeds without a tuft 



of hairs. 5 OENOTHERA. 



1. TRAPA L. 



bispinosa Roxb. Floating in streams. 



2. LUDWIGIA L. 



1. jussieuoides Desr. Zululand. 



2. palustris £11. Midland vleis. 



3. JUSSIEUA L. 



1. repens L. Coast and Midlands. In vleis and pools. 



2. suffruticosa L. Coastbelt and Zululand. 

 suffruticosa var angustifolia Lam. 



4. EPILOBIUM L. 



1. capense Buch. Moist places. Coast and Midlands. 



