90 VEGETABLE ORGANOGRAPEIY. 



which commonly eifuse viscous fluids. They are found, 

 for example, upon the petiole of the Amygdaleae, as 

 the Cherry. These organs appear to be true excre- 

 tory glands : those which are found at the extremities of 

 the notches of leaves, although often different in their 

 form, do not appear to differ from these in their nature. 

 2d. Nectariferous Glands {glandulce nectari- 

 ferce; glandes nectariferes) are organs of very different 

 forms, which exist in flowers, and most frequently exude 

 a honey-like fluid : these are true glands, which we shall 

 describe under the name of Nectaries. 



3d. The Glands which are found at the base of certain 

 hairs, as in the Nettle. 



4th. Those which are situated at the summit of some 

 hairs, as in the Chick-pea. We shall revert to these two 

 last kinds when we treat of Hairs. 



We see, from this rapid enumeration, how much neg- 

 ligence there has been in the study of glandular or glan- 

 duliform organs. Mirbel began to investigate them in 

 a manner more conformable to our real intention, which 

 is the anatomy of them ; and he has already remarked, 

 in this point of view, two kinds of Glands, distinct from 

 each other in their structure. 



1st. Cellular Glands, {glandulce cellulares ; 

 glandes cellulaires), which are formed of a very fine 

 cellular tissue, and have no communication with the 

 vessels. Most of them distil a peculiar fluid, whence 

 we may presume that they are excretory, that is to say, 

 they are destined to carry out of the plant an excreted 

 fluid ; such is the yellow band which is found at the 

 bottom of the calyx of Saxifraga crassifoUa ; tlie glands 

 which surround the shorter stamens of the Wall-flower 

 {Cheiravthus Cheiri) ; those which are placed at the base 

 of the Crown Imperial, &c. 



2d. Vascular Glands (^/awc?M/^ t;<zscw/are5,- glandes 



