GLOaaOLOGY OF ANOIOaPERMa. 439 



(d) Heads in a raceme — e.g.. Ambrosia. .Heads Racemose. 



(e) Heads' in a spike — e.g., Liatris Heads Spicate, 



And BO on. 



3. Irregular. 



Racemosely or corymbosely compound — 



e.g., Gatalpa Panicle. 



Compound forms of the panicle itself are common — e.g., panicled 

 heads in many Compositae, panicled spikes in many grasses. 



B. Ctmose Inflorescbnce. 



L Flowers solitary ; terminal — e.g., Anemone 



nemorosd Solitary Terminal. 



II. Flowers in clusters (Cymes). 



1. Lateral brandies in all parts of the flower 



cluster developed — e.g., Cerasiium Forked Cyme, or 



Dichasium. 

 {This is the Bipa/rous, and so-called BieJiotomous Cyme of authors.) 



2. Some of the lateral branches regularly suppressed. 



(a) The suppression all on one side — e.g., 



Hemerocallis Helicoid Cyme, or 



Bostryx. 

 (6) The suppression alternately on one 



side and the other — e.g. , Drosera. . . Scorpioid Cyme, or 



Clcinnus. 

 (The last two are frequently not distinguished from one another, and 

 are called Monoehasia, Uniparous Cymes, or False Racemes.) 



C. MixBD Inflokbscbncb. 



1. Cymo-Botryose, in which the primary in- 

 florescence is botryose, while the sec- 

 ondary is cymose, as in Horsechestnut. . . Cymo-Botrys. 

 (This is sometimes called a Thyrsus.) 



3. Botryo-Cymose, in which the primary in- 



florescence is cymose, while the sec- 

 ondary is botryose — e.g. , in many Com- 

 posite Botry-Cyme. 



Floral Symmetry. — The p?irts of the flower are mostly arranged 

 in whorls, which are distinctly separated from each other {cyclic flow- 

 ers) ; in some cases they are arranged in spirals, with, however, a dis- 

 tinct separation of the different groups of organs {hemieyclic flowers) ; 

 in still other cases the arrangement is spiral throughout, with no 

 separation of the groups of organs (acyclic flowers). 



