BRITISH FLORA. 



CLASS I. 



21 



$ 



(I 



J! 



S 



DICOTYLEDONOUS!, or EXOGENOUS, 



a 



PLANTS. 



ft 



I Cellular and vascular. Stem formed of two distinct 

 portions, TVood and Bark; the former containing pitli in 



I! the centre, from which diverge the medullary rays^ and 

 increasing by new layers on the outside ; the latter by 



2t new layers within. Leaves ^with the nerves much 



2j branched, and the veinlets reticulateS.^ Flowers having 

 the parts usually arranged in a quinary or quaternary 

 manner. Embryo with two opposite cotyledons^ rarely 



3j more and then verticillate. 



Sub-Class L THALAMIFLORzS. (Okd. L 



) 



Petals many^ distinct^ and^ as well as the stamens^ inserted upon 



pistil) 



lyx) ; hence hypogynous (f 



Conspectus of the Okders.^ 



A, Flowers very irregular. 

 a. Leaves with stipules^ ovary 1-celted. 



9. ViOLACE.E. Stamens 5 ; anthers -with a crest, nacre or less cohering. 



Ovar}^ with 3 parietal placentas. 

 [26. Leguminos^. Stamens 10, mono-diadelphous ; anthers distinct 



Placenta 1, sutural.l 



^ From S/ff, twice or double^ and zoTvXr^hdov^ the cofylMon, -^ ^ w 

 * The orders printed within brackets will be found described at length in some 

 other sub-class^ although so?ne genera or species belong in cha?acter to the prese7it 

 one. On the other hand^ the perigynous and apetalous genera and species will be 

 noticed in the conspectus of some other sub-class. A similar remark applies t& all 

 the sub-classes. 



B 



