TETRANDRIA. \ 7 g 



DIGYNIA 



BUFFO'NIA. 



cell; 2 seeds and 2 valves. 



Cap 



BETULA. Flowers male and female on the same plant. 



CaL 3 -cleft: Bloss. with 3 or 4 divisions. 

 M. CaL containing 3 flowers. 



F. CaL containing 2 flowers : Seeds with a membrana- 

 ceous border on each side. 



MYRFCA. Flowers male and female on the same or on 



distinct plants. Catkin scales crescent-shaped: 



Bloss. none. 

 F. Berry with 1 seed. 



CUS'CUTA. Bloss. 4-cleftj egg 



Caps. 2-celled : cut round. 



cleft 



[Herniaria glabra. Gentiana campestris, and filiformis. Ga 

 lium Mollugo and Aparine. j 



TRIGYNIA. 



1 



BUX'US. Flowers male and female on the same plant. 

 M. CaL 3 leaves: Bloss. 2 petals: Germen an imper- 

 fect rudiment only. 

 F. CaL 4 leaves : Bloss. 3 petals : Caps, with 3 beaks 



and 3 cells: Seeds 2. 



• 



TETRAGYNIA. 



I'LEX. Bloss. 1 petal: Cal. 4 -toothed: Berry with 4 



seeds. 



SAGI'NA. Bloss. 4 petals : Cal. 4 leaves: Caps, with 4 



cells 3 and many seeds. 



TILUE/A. (See Triandria Trigynia.) 

 p 0TAMOGETON. Bloss. none : Cal. 4 leaves : Seeds 



4; sitting. 



RUFPIA. Bloss. none: Cal. none: Seeds 4 j on foot- 



stalks. 

 [Holosteum umbellatum. Linum Radiola.] 



n2 



• 





