GENERA OR FAMILIES. 155 



24. Onagraceous Plants. Onagrace^. 



* Stamens eight ; (flowers regular or nearly so) . 



(100) Epilobium — calyx four- cleft, deciduous ; seeds bearded ; 



flowers purplish or white. 



(101) CEnothera — calyx tubular below, four-lobed; seeds not 



bearded ; flowers large, yellow. 



** Stamens two ; (flowers very irregular). 



(102) Circsea — calyx deeply two-cleft ; petals two. 



25. Haloragaceous Plants. Haloragace^. 



* Stamens eight (sometimes four or six). 



(103) Myriophyllum — monoecious ; stigmas four, sessile on the 



ovary ; fruit tetragonal, separable into four nuts. 



** Stamens one only. 



(104) Hippuris — stigma one, sessile on the ovary ; fruit a one- 



celled nut. 



26. Cornaceous Plants. Cornace^. 



(105) Cornus — petals distinct ; fruit a succulent drupe. 



27. Umbelliferous Plants. UMBELLiFERiE. 



* Umhels simple or imperfectly compound. 



t ^uit without vittcB (oil-cysts) ; albumen solid (not fur- 

 rowed). 



% Fruit laterally compressed. 



(106) Hydrocotyle— fruit flat nearly orbicular, of two carpels, 



each with five filiform ridges ; commissure linear ; calyx 

 teeth obsolete. 



X*^ 



n:. u 





