XIl] 



PLACENTATION, ETC. 



109 



Four carpels are the rule in the following :- 



And in these cases also the placentation is axile. 



In the following the ovary is composed of five carpels : 



Lime Sumach Cydonia 



Arhutus Andromeda Azalea 



Ailanthus Pyi^us Ivy 



Bearberry Loiseleuria Rhododendron. 



In other cases the numbers vary from two to five. 

 The placentation is as a rule axile. 



Examples of flowers with the ovary superior, the rest 

 of the parts being hypogynous, are afforded by 



Clematis 



Sycamore 



Tree of Heaven 



Azalea 



Ash 



Elms 



Barberry 



Holly 



Sumach 



Bearberry 



Privet 



Mahonia 



Norway Maple 



Erica 



Andromeda 



Lilac 



Mulberry 



Tamarisk 



Horse-chestnut 



Ling 



Loiseleuria 



Bittersweet 



Maple 



Vine 



Arhutus 



Menziesia 



Birch 



Tea Tree 



Lime 



Virginian Creeper 



Rhododendron 



Empetrum 



Alder 



Fig. 



The male flowers of the Birch, Alder, Oaks, Beech, 

 Chestnut, Hazel, Hornbeam, Walnut, &c., having no 

 ovaries, cannot properly be described as hypogynous, 

 though morphologically they may be so considered (see 

 pp. 232-263). 



