92 



first leaf is entirely different from that of the normal ones, 

 which are long petioled with a blade broadly oblong and taper- 

 ing at both ends. All the first five leaves of this plant 

 showed the same uniform shape, and there will usually be 

 several more developed before the typical leaf appears. The 

 primary root does not attain any considerable length, and 

 very soon dies off, and is then replaced by the secondary 

 roots, as figured in Plate XVIII, Fig. 152. This figure shows 

 a germinating plantlet about one month old, in which the 

 cotyledon is still attached, and where- the first five leaves 



have developed, the first two (1^ and L^) having partly ^% 



faded. Three roots have come out besides the primary 

 one, but none of these show any ability either of rapid 

 growth or of any form of ramification. 



Anthtiriitm Andraeamun. 

 This e^enus belong-s to the tribe Anthuriea^ in which the 



M 



seeds are albuminous, and where the germination shows the 

 same general cQurse of development, as has been described 

 by Engler, for this group, /. e., the first leaf next the cotyle- 

 don, has the same shape and structure as the normal leaves, 

 with only a few unimportant modifications. The bright 

 yellow fruit (Fig. 153) is a berry, of which the pericarp fs 

 very thin, almost membranaceous, and contains merely one 

 single seed, the testa of which is also very thin. 



While the fruits were still attached to the spadix, several 

 of them had already commenced to germinate, and showed 

 the primary root penetrating the pericarp. The embryo is 

 green. The cotyledon is fusiform, as shown on Plate XVIII, y 



Fig. 156, where it has been detached from the albumen. The 

 first state of germination (Plate XVIII, Fig. 155) shows the 

 conical primary root, covered with root-hairs, and further 

 developed than the small, wart-like plumule, which is still 

 enclosed by the front of the cotyledon. The next state 

 has been represented in Fig. 156, where the primary root has 

 grown further in length, and the plumule is visible, having 

 penetrated the front of the cotyledon, which forms a 

 sheath around it. The first leaf (L^ in Fig. 157) alternates 



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