\ 
26 PRIMARY DIVISIONS, ETC. 
A 
slightest pressure this fluid is injected through the tube into the 
wound made by its point. Ex. nettle. 
43. Pricxues (Fig. 3) are also expansions of the epidermis, 
consisting of hardened cellular tissue (29, e). They are appen- 
ded to the cuticle alone, and are stripped off with it. Unlike 
the thorn (171), they have no connection with the wood, nor do 
they disappear by cultivation. Ex. rose, bramble. (Rubus.) 
44. Guanps (Fig. 3) are minute bodies of cellular tissue, situ- 
ated on various parts of the plant, generally serving to elaborate 
and discharge its peculiar secretions, which are oily, resinous, 
saccharine, acrid, &c. 
a. They are either sessile, as in the cassia; or mounted upon a stipe, as in the 
passion flower; or imbedded in the leaf, causing it to appear punctate, as in the 
leaf of the lemon. Often the gland appears to be merely the expansion of a hair, 
either at its base or its summit. Such are called glandular hairs. 
45. Analogous to glands, are those cavities formed in the cel- 
lular tissue, to serve as receptacles of secretion. Examples are 
seen in the rind of the orange and lemon, containing minute 
drops of a fragrant volatile oil. The turpentine of the fir balsam 
is stored up in large reservoirs of this kind. 
CHAPTER III. 
PRIMARY DIVISIONS OF THE VEGETABLE KINGDOM. 
46. Tur vegetable kingdom has long been considered by 
botanists under two great natural divisions, namely, Paaznoca-- 
MIA, or FLOWERING Puants, and Cryprocamtia, or FLOWERLESS 
Pants. 
47. Besides the obvious distinction made by the presence or 
the absence of the flower, these divisions are further distin- 
guished by their structure. The Phenogamia abound with the 
ligneous and vascular tissue, while the Cryptogamia consist 
more generally of the cellular. Hence, the former are also called — 
Vascunares, and the latter CELLULARES. ie 
