MOEPHOLOGY OF EEPEODUCTIYE ORGANS 121 



in the Elder (Sambucus), the Laurustinus, and others (fig.W2}. 

 A good deal of complication often arises from suppression of the 

 bracts, or from distortion due to condensation of the internodes 

 or to irregularities in growth. An example of this kind may be 

 found in the inflorescence of the Sweet William, a member of 

 the Caryophyllacese. This has been called a Fascicle. In it the 

 successive axes are developed so as to bear their flowers at the 



Fig. 230. 



Fig. 2:il 



Fig. 230. Dicbasial cyme or Dichasium of a species of C'eraUium. a. Primary 

 axis terminated by a flower, a", a". Secondary axes, two in number, aris- 

 ing fi'Om the axils of opposite bracts, h, h, and terminated also by flowers. 

 a'", a'", a'", a'". Tertiarj' axes, four in number, arising from bracts, &, 

 and bearing other bracts, 6, from wbicli the quaternary axes, eight in 

 number, arise, a"", a"", a"". The flowers are more developed on the 

 primary axis than on the other axes ; thus the one terminating that axis 

 is in the state of fruit ; the flowers of the axes of fi" and a'" are also in 

 fruit, but less developed than that of «', wliile in the axes a" ' the flowers 

 only are expanded. Fig. 231. Dichasial cyme or Dichasium of the Cen- 

 taury (£rythr(sa Cenlauriiim). a', a", a'", a"". Floral axes. /', f'., /'", 

 J'"'. Flowers terminating those axes respectively. The flowers will be 

 observed to be most developed in proportion to their age ; thus/' is in the 

 state of fruit ; /",/", expanded ; /'",/'",/'", and the others still in bud. 



same level, forming a flat-topped cyme, which superficially re- 

 sembles a corymb. 



d. The Cymose TJmhel. — This differs from the polychasium in 

 having the main axis as long as, or longer than, the secondary 

 ones, a number of which arise some little distance below its apex. 

 The secondary axes do not give rise to tertiary ones, so that the 

 form of the true or racemose umbel is simulated. The order of 



