'■too 
TETR ADYNAMIA. 
Classis XV» 
TETRADYNAMIA. 
Stamina 6, quorum 4 longiora. 
SILICULOSA, 
Pericarpium subrotuntlum. 
Pouch not notched at the end, 
DRABA. Silicula integra, valvis planlusculis, dls- 
sepimento parallelis. 
DRABA. Pouch with nearly flat valves. Style 
none. 
COCHLEARIA. Silic, subintegra, turgida, rugo- 
sa, bivalvis, polysperrna. 
COCHLEARIA. Pouch heart-shaped. Valves 
blunt ; bulging, 
CORONOPUS. Silic. subintegra, compressa, cor- 
rugata,* evalvis, disperma. 
CORONOPUS. Pouch nearly entire^ compressed^ 
wrinkled ; without valves ; with 2 seeds, 
THLASPI. Silic. emarginata, obcordata ; valvulis 
marginato-carinatis. 
THLASPI. Pouch inversely heart-shaped. Valves 
(in some speciesJ bordered', keeled: 
