146 SUMMER FLOWERS. 



(24) Turritis — pod compressed, the valves slightly convex, wifch 



a prominent longitudmal nerve ; stigma capitate ; seeds in 

 two rows. 



(25) Arabis — pod compressed, the valves nearly flat, with a pro- 



minent longitudinal nerve, or rarely nerveless with nume- 

 rous longitudinal veins ; stigma obtuse ; seeds in a single 

 row. 



(26) Cardamine — pod compressed, the valves flat, nerveless ; 



stigma capitate ; seeds in a single row. 



JJ Style forming a stout, conical, often seed-hearing heaJc. 



(27) Brassica — calyx erect ; pod terete or angular ; seeds globose, 



in a single row. 



(28) Sinapis — calyx spreading ; pod terete or angular ; seeds 



globose, in a single row. 



(29) Diplotaxis — calyx spreading ; pod compressed ; seeds oval 



or oblong, in two rows ; beak less distinct than in Brassica 

 and Sinapis. 



ft Pods ivitTiout valves or dissepiments. 



(30) Raphanus — pods linear or oblong, tapering upwards, di- 



vided transversely into several one-seeded joints, forming 

 cells, the lowermost barren. 



** Fruit a silicule or pouch, scarcely more than one-half longer 

 than broad. 



t Touch without valves, or one-celled, one-seeded. 



(31) Cakile — pouch two-jointed, the joints placed end to end, 



the upper one angular, deciduous, one-seeded, the lower 

 sometimes sterile. 



(32) Crambe— pouch two-jointed, the joints placed end to end, 



the upper globose, one-seeded, the lower barren, stalk-like. 



(33) Senebiera — pouch somewhat kidney-shaped, almost two- 



lobed, of two cells placed side by side, not bursting ; cells 

 one-seeded. 



