100 



KEY AND FLORA 



Fig. 18. Types of pods of CrucifercB 



A, flattened pod of Arabis, seeds in a single row in each cell : s, cross section 

 of pod, showing flattening parallel to the partition. B, pod of Radicula 

 palustris, seeds in several rows. C, neai-ly cylindrical pod of Sisyuibrium. 

 I), beaked pod of white mustard {Slnapis alba). E, dried necklace-shaped 

 and beaked pod of radish {Raphanus Raphanistrum). F, flattened pod of 

 shepherd's purse (Capsella Bursa-pastorls) : s, cross section, showing flat- 

 tening at right angles to the partition. G, flattened pod of LepkUum cam- 

 pestre • s, cross section, showing flattening at right angles to the partition. 

 (The pods natural size, the sections somewhat magnified.) (After Cosson 

 and De Saint-Pierre) 



A 



Pods short and flattened, contrary to the jmrtition, sj^litfing open ichen ripe. 



Pod roundish. Lepidium, IV 



Pod triangular, inversely heart-shaped. Capsella, V 



Pods glohular or cylindrical, splitting open tchen ripe, 

 (a) Pods globular. Flowers yellow. 



Lesquerella, III 



