108 THE hake. 
of the anthers are situated below. See Fig. 35, where | t 
pores are seen at the apex of the anther. 4. The anther 
dehisees by valves, when the whole side of the cell, as in the 
Berberidew, or parts of the side, as in Laurinee. (See Fig. 
34), separate and bend upwards, remaining attached only by 
a small point at the upper part of the piece that copra 
like a hinge. S 
_ 403, The Poxuen is a very fine powder, contained in the — 
cells of the anther, from which it is emitted upon the stigma, 
whence it is conveyed, (or part of it), to the ovules, which 
it impregnates. It consists of small vesicles or globules, con- 
taining a mucous fluid mass. It is generally yellow in 
colour. 
404. The form of the grains of pollen is usually spheroid- 
al, the surface being occasionally marked by elevations and : 
projections, as in the Mallow. They are very small, some- 
times not more than 1-2000th part of an inch in diameter, 
-while the largest never measure more than 1-360th part of 
an inch. These grains are generally loose, but in the Or- 
chide, and Asclepiadew, they unite into a mass of a waxy _ 
consistence, and in the Onagrariz they are held together b 
a loose web of cellular tissue. In the Orchidew the pollen 
mass, as it is usually called, fills completely the cells of 
anther, and has'a stalk attached to it. : 
405. It does not appear, from numerous shcocsasional ; 
at every stage of the growth of the pollen, that it has any con- 
nection with the walls of the cell of the anther. Decandolle, _ 
nevertheless, is inclined to believe that the grains of pollen — 
_* are attached to the parts just mentioned, in the early stage of . 
a strongly corroborated by their analogy to ovules. Turpit 
even goes so far as to maintain the existence of an elevated 
_ part to which these grains are connected. 
2 408. When the pollen is smooth, it has been remarked by 
_ Malpighi, that a longitudinal line is seen when the grains are 
_ dry, disappearing when they are wet. The use of this is not 
ee eek erat ae 
