284 ANOMALIES OF DEVELOPEMENT. CHAP. V. 



covered with a hoary down. The skin was easily 

 separated from the nucleus, which when cut open 

 was found to be of a firm and solid consistence 

 containing a maggot. 



Almost all leaves indeed are liable to similar de- 

 formities arising from similar causes, giving them 

 a blistered, wrinkled, or curled appearance ; and 

 often producing disease. But sometimes the ano- 

 maly consists in the excess or deficiency of the 

 usual number of leaves protruded in a group. Thus 

 in the case of the Trefoils, in which the leaves are 

 regularly protruded in trees, you will often find 

 them protruded in sets of four, five, or even six. 

 This anomaly is often to be met with at least in the 

 case of the commonly cultivated Clover, in which 

 you will sometimes find also a set consisting but of 

 a single pair. 



Anomalies But the anomaly may also consist even in the 

 of figure. natura j figure O f the leaf itself. Most leaves ex- 

 hibit in their general aspect a sort of compressed 

 and flattened surface, whatever may be their specific 

 figure ; but to this rule there exists a variety of ex- 

 ceptions. The leaves of Asparagus offitinalis are 

 bristle-shaped ; the leaves of Salsola Kali are awl- 

 shaped ; and the leaves of A Ilium Cepa are tu- 

 bular, tapering to a point. But one of the most 

 Sar- remarkable anomalies of figure is that which occurs 

 j n t h e ] caves o f the genus Sarracenia, of which 

 the lower portion is tubular, ascending and ap- 

 proaching to funnel-shaped, or rather pitcher- 



racema. 



