GROSS ANATOMT OF FLOWERING PLANTS. XXV 



II. Flowers in clusters (Cymes). (Fig. XX.) 

 1. Lateral branches in all parts of the 

 flower-cluster developed — e.g., Ce- 

 lastium Forked Cyme. 



CYMEIS. 



SCOT? PIOID. 



Fig. XX. —Diagrams of three forms of cymes. 



3. Some of the lateral branches regularly suppressed, 

 (a) The suppression all on one side — 



e.g., Hemerocallis . . . Hblicoid Ctmb. 

 (5) The suppression alternately on 

 one side and the other — e.g., 



Drosera Scorpioid Cyme. 



(The last two are frequently called False Racemes.) 



C. MIXED INFLORESCENCES. 



1. Oymo-Bolyryose, in which the primary 

 inflorescence is botryose, while the 

 secondary is cymose, as in Horse- 

 chestnut .... 

 (This is sometimes called a Thyrsus.) 

 3. Botrryo- Cymose, in which the primary 

 inflorescence is cymose, while the 

 secondary is botryose — e.g. , in many 

 Composita! .... 

 In addition to noting the kind of inflorescence, examine and 

 describe the bracts (small leaves), pedicels, and larger branches of 

 the flower-cluster, noting their shape, size, surface, and color. 



FLORAL SYMMETRY. 



Floral Whorls. — The parts of the flower are mostly arranged 

 in whorls or cycles, distinctly separated from each other (cyclic 



Cymo-Botrys. 



Botry-Cyme. 



