o30 DESCRIPTION OF THE PLATES. 



Hairs. 



A. A cupulate hair. 



B. A capitate ditto from Petunia. 



C. An awl- shaped ditto, or sting from the Nettle. 



D. A hair of Malpighia. 



E. A simple hair. 



F. Divided ditto. 



G. Moniliform ditto. 

 II. A hair from Malm. 



I. A shield-shaped ditto from the leaf of El&agnus. 



PLATE IV. 



Stems. 



Fig. 



1. A fasciculated branch of Spartium junccum. 



2. A transverse section of the stem of a Juniper, half the natural size, showing a 



gelivure, or frozen layer. (See vol. i. p. 1C3). 



3. Section of the annual stem of Ferula communis. 



PLATE V. 



Stems. 



Fig. 



1. Bifurcation of a hranch of the Horse-chestnut. 



2. A transverse section of a branch of the Ebony-tree (Diospyros Ebenum), showing 



the sudden difference of colour between the Duramen and Alburnum. 



3. Transverse section of Quercus Tanza, showing the large medullary rays, and the 



very thick cellular layer of the bark. 



PLATE VI. 



Ficus Elastica. 



Portion of a shoot of Ficus elastica, showing how the stipules inclose the young 

 leaves at their infancy; also a fragment of the bark with lenticils, from one of 

 which an adventitious root is seen proceeding. 



PLATE VII. 



Leaves. 



Fig. 



1. Pinnatiftd leaf of Comptonia asplemfolia. 



2. A leaf of Acacia heterophylla. with the common petiole very slightly dilated, 



and bearing two pair of partial petioles furnished with leaflets. 



3. Another leaf of the same plant, with the common petiole more dilated, but still 



bearing several pairs of partial ones. 



4. Another leaf, with the petiole still more dilated, and bearing very few partial ones. 



5. Example of the same plant, with the petiole entirely dilated into a phyllodium 



and no longer bearing leaflets. The flowers in compact heads, pedicellate and 

 axillary. 



PLATE VIII. 



Root. 



Extremity of one of the branches of the root of Pandanus odoratissimus, of the 

 natural size, showing the large scaly spongioles which terminate the principal 

 branches. 



