ANACAKDIACE^E 371 



Schinus Molle (fig. 259) and Duvaua dependens agree in all 

 essential points. The mode of germination of the seed from 

 the drupaceous fruit is shown in Schinus Molle. Duvaua 

 dependens differs in the obscure venation and the cotyledons 

 not being sinuated on one side. This shallow sinus owes its 

 origin to the indentation of the lower side of the horizontal 

 seed in Schinus by a thickening or elevation of the receptacle 

 in that region. 



The trinerved character and the shallow sinus of the 

 cotyledons prevail in species of other genera, where the outline 

 differs considerably from that of Schinus. This is BO in 

 the case of Ehus typhina (fig. 256), with epathulate- oblong 

 cotyledons, and in Odina Wodier, having long, lanceolate, 

 falcate cotyledons with short broad petioles. 



A departure from the strictly aerial and foliaceous coty- 

 ledons is met with in Anacardium occidentale. Here they are 

 large, fleshy, falcate, and directed to one side of the young 

 stem, plano-convex, trinerved, and slightly reticulate on the 

 back, but showing no trace of nerves on the upper surface. 

 Another nearly similar case occurs in Buchanania latifolia (fig. 

 258), having obovate, unequal-sided, fleshy cotyledons with a 

 thick and a thin edge. They conform to the interior of the seed 

 and that again to the endocarp, to which they owe their pecu- 

 liar shape. Immediately after germination they are both 

 directed to one side of the stem as in subterranean cotyledons ; 

 but they ultimately spread out right and left. Thick, fleshy, 

 and truly subterranean cotyledons occur in Ehus Thunbergiana 

 (fig. 255), a South African species with almost dry, one-celled, 

 one-seeded fruits from three-quarters to one inch broad. A 

 more remarkable instance occurs in Mangifera indica (fig. 257), 

 the fleshy, oblong, subterranean cotyledons of which are often 

 lobed and sometimes proliferous, as shown in the figure. 



The primary leaves of the seedling show considerable 

 variation in the different types of the Order. Those observed 

 may be grouped under three very distinct types, namely, 

 (1) those reduced to scales, (2) simple but foliaceous leaves, 

 and (3) compound leaves. The first five leaves of Ehus 

 Thunbergiana are minute scales ; while all succeeding ones 

 are simple, and penninerved. The first six at least of 



B B 2 



