no 



Myrtus Group (Myrtiflorae) — Ovary usually inferior, 

 calyx lobes often very small. 



Myrtales Araliales (Umbellales) 



LiGUSTRUM Group (Ligustriflorae) — Sympetalous, ovary 

 superior. 



Ebenales Solanales 



Loganiales (Contortae) Borraginales 



RuBiA Group (Rubiflorae) — Sympetalous, inflorescence 

 usually dense, ovary inferior. 



Rubiales Asterales 



Casuarina, Balanops, Myrica, Proteales, Santalales, Euph- 

 orhiaceae and others have not been included in the above out- 

 line. As living plants have not descended from each other, any 

 diagram of them can be only a top view, so to speak, of the tree 

 of evolution. It may aid in understanding affinities, but for 

 practical purposes a linear sequence of plant families is re- 

 quired. 



Brooklyn Botanic Garden 



References 



1. Engler, A. 1897. Die Natiirlichen Pflanzenfamilien, Nachtrag iv: 

 376. 



2. Gundersen, A. 1939. Flower Buds and Phylogeny of Dicotyledons. Bull. 

 Torr. Bot. CI. 69 (May). 



3. Hutchinson, J. 1926. The Families of Flowering Plants: Dicotyledons. 



4. Rendle, A. B. 1925. The Classification of Flowering Plants: Dicotyle- 

 dons. 



5. Tippo, O. 1938. Comparative Anatomy of the Moraceae and Their 

 Presumed Allies. Bot. Gaz. 100: 1-99. 



