The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 SECTION 9.] POLLEN. 103 line along the whole 293. By suppression in certain cases the anther may be reduced to one cell or halved, hi Globe Amaranth (Fig. -2^3) there is a Bingle cell without vestige of any other. Different species of Sage and of the While Sag California show various grades of abortion of one of the auther-cells, along with a singular lengthening of the connective i Fig. 302-305 . 294. The splitting open of an anther for the discharge of its pollen is termed its D
The elements of botany for The elements of botany for beginners and for schools elementsofbotany00gray Year: 1887 SECTION 9.] POLLEN. 103 line along the whole 293. By suppression in certain cases the anther may be reduced to one cell or halved, hi Globe Amaranth (Fig. -2^3) there is a Bingle cell without vestige of any other. Different species of Sage and of the While Sag California show various grades of abortion of one of the auther-cells, along with a singular lengthening of the connective i Fig. 302-305 . 294. The splitting open of an anther for the discharge of its pollen is termed its Dehiscence. 295. As the figures show, this is commonly by length of each cell, either lateral or, when the anthers are extroise, often along the outer face, and when introrse, along the inner face of each cell. Some- times the opening is only by a chink, hole, or pore at the top, as in the Azalea, Py- rola (Fig. 307), etc.; sometimes a part of the face separates as a sort of trap-door (or valve), hinged at the top, and open- ing to allow the escape of the pollen, as in the Sassafras, Spice-bush, and Barberry (Fig. 308). 296. Pollen. This is the powdery matter, commonly of a yellow color, which tills the cells of the anther, and is discharged during blossoming, O • 309 310 311 after which the stamens generally fall or wither away 812 313 Under the micro- scope it is found to consist of grains, usually round or oval, and all alike in the same species, but very different in different plants. So that the
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