Cruciferm 



159 



PcBonia, Peony. Large showy flowers with deep red petals, 

 and stamens inserted in a prominent disc. 



Rflnunculus, Crowfoot or Buttercup.- A numerous genus, 

 the flowers usually yellow, in some few cases white, but all 

 characterised by the presence of nectaries at the base of the 

 petals. 



CRUCIFER^. 



Typical plant, Wallflower {Ckeiranthus Cheiri) (fig. 296). 

 Note, the stem is shrubby below and herbaceous above (the 



Fig. zg6. — Wallflower 

 (.Ckeiranthus Cheiri), 

 Siliquosse. Part of 

 plant. 



Fig. 297. — I. Schizocarps oi Isatzs tinctoria. 

 II. Traiisver.se section of angustisept sili- 

 cula of Capsella. III. Transverse section 

 of latisept silicula, a, of Catneiina ; b, four 

 seeds. IV. Lomentum oi Raphanus. 



plants of the order are generally herbs, sometimes under-shrubs). 

 Leaves alternate and exstipulate ; flowers are arranged in a 

 raceme ; calyx four sepals, saccate ; corolla four petals, cruci- 

 form; stamens six in number, tetradynamous (fig. 213) (note, 

 in cultivation there is always a tendency for the stamens to be- 

 come the same length); pistil with single ovary and two stigmas; 

 fruit a siliqua. (Besides the siliqua there is also met with in 

 the order the silicula, the lomentum, and an indehiscent fruit 

 as seen in the Woad, figs. 271 and 297.) This is a large and 



