108 



NUMBER OF CARPELS 



[CH. 



The pistil is monocarpellary in 



Barberry 



Robinia 



Bird Cherry 



Ekeagnus 



Laburnum 



Blackthorn 



Mezereon 



Gorse 



Plum 



Cherry Laurel 



Mahonia 



Cherry 



Portugal Laurel 



Hippophae. 



In the rest of the angiospermous trees and shrubs here 

 concerned the ovary is syncarpous. It is composed of two 

 carpels in 



Broom 



Bullace 



Spurge Laurel 



Whin 



Gean 



Almond 



Willows 

 Walnut 

 Bittersweet 

 Black Currant 

 Poplars 

 Sweet Gale 

 Lilac 

 Maple 



Hazel 

 Mulberry 

 Red Currant 

 Dogwood 

 Hornbeam 

 Tea Tree 

 Gooseberry 

 Aucuba. 



Birch 



Elms 



Privet 



Sycamore 



Alder 



Fig 



Ash 



Norway Maple 



In all but a few of these the placentation is axile : 

 the chief exceptions are the following, in which it is 

 parietal : 



Willows Gooseberry Black Currant 



Poplars Red Currant. 



The ovary is tricarpellary in the following : 



Butcher's Broom Horse-chestnut Wayfaring Tree 

 Honeysuckles Tamarisk Elder 



Guelder Rose. 



But it should be noted that the number may vary, by 

 abortion of one or more of the carpels, in all but the first 

 three of the last series. The placentation is usually axile. 



