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Special Morphology and Classification. 377 
hairs. Flowers solitary or collected into an inflorescence, and herma- 
phrodite, moncecious, or dicecious. The tropical species especially are 
so polymorphic, and yet so nearly related, that their classification is at- 
‘tended with extreme difficulty. The genera of northern Europe agree 
in never having a double perianth separable into calyx and corolla ; in 
the styles and stigmas being distinct ; in the fruit being a three-valved - 
Fic. 482.--Euphorbia Lathyris ; 1. part of a plant (natural size) ; II. inflorescence ; 
III. male flower (magnified). 
capsule, the valves separating elastically from a central axis; and inthe 
seed being straight, the embryo lying in the centre of a fleshy and oily 
endosperm, [Among the more important genera of this very large order, 
which is divided into a number of suborders, are Phyllanthus, Antz- 
gyt<:” € : 
