SECT. II 



PHANEROGAMIA 



589 



and Dicentra are cajjsules. Dicentra siyedahilis, which is frequently cultivated, 

 has a bisymmetrical corolla with two spurs. Seeds with endosi)erm. 



Fig. 57S. — Corydalis aurm. «, Part 

 of axis of raceme with a flower ; 

 /j, style and stamens, (x 2.) 



Fig. 570. —Floral diagram of CorydalU 

 cava. (After Eichler.) At the 

 base of the stamen standing above 

 the spur is a nectary. 



Family 3. Crueiferae (^*^). — Annual, biennial, or perennial herbs 

 without milky juice. Inflorescence racemose, usually without bracts 

 or bracteoles. Flowers actinomorphic, always lateral, composed of 

 bimerous whorls. Floral formula, K 2 + 2, C 2 + 2, A 2 + 4, G (2). 

 The outer whorl of sepals stands in the median plane ; the foiu' 



Fio 580.— Crueiferae. Floral 

 diagram (Brassica). 



Fig. 581. — Cardamine prateiuU: Flower w'ith 

 perianth removed. (After Baillox, x 4.) 



petals alternate with the sepals. The two outer stamens are shorter 

 than the four inner ones which stand in the median plane. The 

 latter correspond to two stamens branched to the base. The carpels 

 form a superior, usually pod-like, ovary, Avhich is divided into two 

 chambers by a false septum stretching betAveen the parietal placentas. 

 The fruit opens by the separation from below upwards of the main 



