Crticiferae 5 t 



ledons flat Radicle accumbent o : :. {Flozjcrs white, 

 yellow or lilac.) 



a. Stigmatic lobes erect, or decurrent to the style. 



Matthiola. 



/3. Stigma small, simple, terminal. 



Hairs forked. Lateral sepals pouched. Pods com- 

 pressed or 4-angled, valves i -nerved. *Cheiranthus. 



Hairs simple or o. Pods terete, valves turgid, not 

 elastic. Seeds minute, 2-seriate. Nasturtium. 



Pods 4-angled, valves keeled. Seeds oblong. Flowers 

 yellow. Barbarea. 



Pods flat, valves i -nerved, not elastic. Plowers 

 mostly white. Arabis. 



Rhizome not fleshy. Pods flat, valves elastic. Funicle 

 filiform. Cardamine. 



Rhizome fleshy. Pods flat, valves elastic. Funicle 

 dilated. Dentaria. 



Tribe 2. Sisymbrieae (Siliquosae notorhizae). Seeds 

 usually I -seriate. Cotyledons flat. Radicle incumbent 

 o 1 1. {Flowers as above.) 



Glabrous, or hairs simple and spreading. Flowers 

 yellow. Sepals equal. Stigma obtuse. Sisymbrium. 



Hairs appressed, branched. Flowers yellow. Stigma 

 obtuse. Erysimum. 



Hairs spreading. Flowers w^hite or lilac, fragrant. 

 Lateral sepals gibbous. Stigmas decurrent on st>'le. 



*Hesperis. 



Tribe 3. Brassiceae (Siliquosae orthoplocae). Seeds 

 i-2-seriate. Cotyledorts longitudinally folded o > >. 

 Radicle incumbent. {Flozvers yellow.) 



Pods terete or angled. Seeds i -seriate, globose. 



Brassica. 

 4—2 



