UMBELLIFER^E 23 



leaves are peltate, orbicular, and crenate from the first, or, 

 the first one is sometimes reniform and nearly or quite entire. 

 The cotyledons of Trachymene pilosa are oblong-spathulate, 

 trinerved and minutely emarginate. Those of T. pusilla are 

 slightly broader ; and both correspond fairly to the shape of 

 the carpels. In their herbage they bear a striking resem- 

 blance to the mossy-leaved Saxifrages. The first leaf is trifid, 

 followed by some that are tripartite with cuneate, trifid seg- 

 ments, and ultimately by others that are tripartite with entire 

 segments. The cotyledons of Eryngium paniculatum (fig. 407) 

 are also spathulate, but very small, while the primary leaves 

 vary from suborbicular through spathulate to elliptic with 

 spiny-serrate margins. The first leaves of E. pandanifolium 

 are similar but less prominently spiny-serrate. The first two 

 of Bifora Biebersteinii are broadly triangular and trifid, 

 followed by a pinnatisect leaf, then by another that is two to 

 three times cut in the same way. 



The cotyledons are oblong, and trinerved with long 

 petioles ; and those of Coriandrum sativum are closely similar. 

 There is also a marked similarity between the primary leaves 

 of both species, as well as the ultimate ones. The cotyledons 

 of Eryngium giganteum are broadly oval and trinerved. 



The first two leaves are reniform, followed by others which 

 are cordate in outline, but somewhat variable in detail. 

 The petioles of the cotyledons are elongated and slender. 

 Heracleum Sprengelianum connects this group with the 

 next, for the difference is only one of degree. The elliptic 

 lamina of the cotyledons is three- to five-nerved. The first 

 leaf is cordate, five-nerved, and shallowly five-lobed. The 

 first leaf of Heracleum villosum (fig. 416) is roundly cordate 

 and crenate, while the laminae of the cotyledons are linear- 

 oblong and sometimes very unequal. Those of Peucedanum 

 sativum (fig. 415) are similar, but occasionally there are three 

 cotyledons, sometimes two and bipartite. 



The third group includes a number of species where the 

 lamina of the cotyledons is short, broad and trinerved, but 

 the petioles are elongated and connate into one cylindrical 

 piece, or are much less decidedly connate, sheathing the 

 younger leaves. This peculiar behaviour is due to the 



