166 CONSERVATIVE ORGANS. [LECT. IV. 



neeus, who points out the close affinity, except in 

 situation*, which exists between them and the 

 buds of trees. 



Bulbs may be divided into solid, scaly, and 

 laminated. 



I. The SOLID BULB ^ is a mass of cellular 

 substance, filled with nutritious fluids, and en- 

 closed within a thin epidermis, with vessels run- 

 ning through it from the basis to the apex. It is 

 covered with one or more coats, either of a mem- 

 branous, or a fibrous, or a reticulated texture J. 

 The solid bulb resembles the tuber in several re- 

 spects ; but differs from it in being coated, and, 

 as has been already noticed, in giving off the roots 

 from a radical plate, or from a scale at the basis 

 of the bulb, the point opposite to that from which 

 the shoot is produced. 



Solid bulbs may be arranged under three spe- 

 cies, taken from the situation on the old bulb 

 where the new one is produced ; and thence they 

 may be denominated superincumbent, lateral, and 

 enclosing. 



1. The Superincumbent solid bulb (Bulbus so- 

 lidus superpositus) I have so named from the new 

 bulbs being produced on the summit of the old 

 one, and appearing, even when they are fully 



* " Bulbus est hybernaculum caudiei descendenti insidens." 

 Phil. Bot. 85. 



f " Solidus constans substantia solida.'* Ib. 

 J Vide Plate L fig. 7. 



