Synanthesis — 145 — Systemic Mutation 



Synoecious. — Having staminate and pistillate flowers both 

 present in the same head. 



Synspermous. — Having the seeds fused together. N. Syn- 

 spermy. 



Syntechny. — Similarity due to a common environment. Adj. 

 Syntechnic. 



Synthetic Variety. — A term used particularly with cross- 

 pollinated plants to refer to a variety produced by the combina- 

 tion of selected lines of plants and subsequent normal pollina- 

 tion (Hayes & Immer). 



Systemic Mutation. — See under Macro-evolution. 



