GENERA OR FAMILIES. .29 



(10) Arabis— pods linear, compressed ; valves nearly flat, with a 



prominent rib. 



(11) Cardamine — pods linear, compressed ; valves nerveless. 



(12) Alliaria— pods linear, terete, the valves convex 3-ribbed; 



stalk of the seed flattened and winged. 



(13) Dentaria — pods narrow-lanceolate, tapering, compressed; 



valves flat, nerveless. 



** Fod siliculose, less than tliree times as long as hroad. 

 t JPod (or pouch) dorsally compressed, the valves parallel 

 to the hroad partition. 



(14) Draba — pouch oval or oblong, compressed; cells many- 



seeded ; filaments simple. 



(15) Alyssum — pouch roundish or oval, compressed ; cells two- 



seeded ; filaments toothed or winged near the base. 



tt Pod (or pouch) laterally compressed at right-angles to 

 the narrow partition, the valves heeled. 



(16) Hutchinsia — pouch elliptical, entire ; cells two-seeded. 



(17) Teesdalia — pouch emarginate, the valves narrowly winged ; 



cells two-seeded ; filaments with a scale-like appendage near 

 the base. 



(18) Thlaspi — pouch emarginate ; the valves broadly winged ; 



cells many-seeded ; filaments simple. 



4. Violaceous Plants. Violace^. 



(19) Viola — lower petal and filaments of the two lower stamens 



spurred. 



5. CaryophyllaceoTis Plants. CARYOPHYLLACEyE. 



* Sepals united into a cylindrical tuhe. 



(20) Lyclinis — styles five, rarely four; capsule opening in 5-10 



teeth at top. 



