Cruciferae. 25 



141 Petals unequal, Iberis V. 



141 Petals equal, Lepidium VI. 



142 Pods jointed, 143 

 142 Pods beaked, 145 



143 Pods many-jointed, .... Raphanus XVIII. 



143 Pods 2-jointed, Cakile XXI. 



144 Calyx equal at the base, 146 

 144 Lateral sepals saccate, 147 



145 Calyx erect, ....... Brassica XVI. 



145 Calyx spreading, ...... Sinapis XVII. 



146 Pod short, Nasturtium XII. 



146 Pod long, 148 



147 Pod compressed, Cheiranthus II. 



147 Pod quadrangular, Hesperis XV. 



148 Pod compressed, 149 



148 Pod nearly cylindrical, 150 



149 Valves veinless, Cardamine IX. 



149 Valves with prominent veins, .... Arabis X. 



150 Cotyledons accumbent, Barbarea XL 



150 Cotyledons incumbent, 151 



151 Cauline leaves numerous entire, . , . Erysimum XIV. 



151 Leaves mostly radical or else pinnatifid, Sisymbrium XIII. 



\. — THLASPL 



Pouch compressed with the dissepiment in the shortest diameter, valves 

 winged at the back, leaves entire, radical leaves in a rosette, cauline leaves 

 hastate. 



Style shorter than the notch, 152 



Style longer than the notch, .... T. alpestre. 



152 Pod large orbicular, .... T. arvense. 



152 Pod small obcordate, . . . . T. perfoliatum. 



Thlas'pi perfolia'tum (3). Perfoliate Penny-Cress. 4 — 5. Pod obcordate, 



(146) style veiy short, cauline leaves sagitto-cordate amplexicaul. 



[G. {Stackhouse), C. 

 Thlas'pi alpes'tre (14). Alpine Penny- Cress. 6 — 8. Pod obcordate, notch 

 (i47<^) shallow, style longer than the notch in the pouch, radical leaves 

 obovate, cauline leaves sagittate. [G. {Attermire^ Giggleswick Scar, 

 Old Lead-mi7ies between Malham and Settle). 



THLAS'PI ARVEN'SE (79). Mithridate Mustard. 5—7. Radical 

 (145) leaves oblong, cauline leaves sagittate, pod large orbicular deeply 

 notched. Fields. 



