I 22 



Order VII. Aristolochiales. 



Perianth simple, coloured and showy, tubular. Ovary 

 inferior, i- or 4- or 6-celled ; ovules numerous. 

 Climbing shrubs or root parasites (S. A.). Fam. 13 — 15. 



Order VIII. Polygonalcs. 



Perianth simple, regular, sometimes coloured. Ovary 

 1 -celled; ovule solitary, straight, rarely curved. Leaves 

 with stipules. Flowers small. Fam. 16. 



Order IX. Centrospermae. 



Perianth simple or double, often showy. Stamens 

 generally as many as the perianth-segments and opposite 

 them. Carpels 1 or more, connate or quite fused ; ovules 

 1 or many, campylotropous. Embryo curved. Albumen 

 mostly central. Mostly herbs. Fam. 17 — 23. 



Series II. Dialypetalae. 

 Perianth double, except in a few cases. Fam. 24. — 106. 



A. Carpels mostly free, superior. 



Order X. Ran ales (Polycarpicae). 



Perianth various, sometimes simple. Stamens numerous. 

 Carpels many, rarely 1. [Exc. Menispermaceae.] 



Herbs or woody plants. Fam. 24 — 30. 



B. Carpels ittostly connate, sit peri or. 



Order XI. Rhoeadales. 



Perianth double, regular or irregular, carpels 2 or 

 many, connate. Herbs or shrubs. Inflorescence generally 

 racemose. Fam. 31 — 35. 



(Key to the families i — 35 on pages 125 — 127.) 



