. Botany all the year round; a practical text-book for schools. Botany. viduals. Examples of dimorphic flowers are the pretty httle bluets {Houstonia ccerulea), the partridge berry {Mit- chella repens), the swamp loosestrife {Lythrum lineare), and the English cowslip. Of tri- morphic flowers we have exam- ples in the wood sorrel, and the spiked loosestrife {Lythrum. salica- ria) of the gar- dens. These flowers were a great puzzle to botanists until the celebrated naturalist, Charles Darwin, proved by a series of careful experiments that the seed pro- duced by pollinating a dimorphous flower wi
. Botany all the year round; a practical text-book for schools. Botany. viduals. Examples of dimorphic flowers are the pretty httle bluets {Houstonia ccerulea), the partridge berry {Mit- chella repens), the swamp loosestrife {Lythrum lineare), and the English cowslip. Of tri- morphic flowers we have exam- ples in the wood sorrel, and the spiked loosestrife {Lythrum. salica- ria) of the gar- dens. These flowers were a great puzzle to botanists until the celebrated naturalist, Charles Darwin, proved by a series of careful experiments that the seed pro- duced by pollinating a dimorphous flower with its own pollen, or with pollen from a flower of similar form, are of very inferior quality to those produced by im- pregnating a long-styled flower with pollen from a short-styled one, and vice versa. 449-451. — Three forms oi Lythrum 332. Wind Pollination. — But the problem is only half solved when a plant has been rendered incapable of impreg- nating itself. Cross- pollination, that is, the transfer of pollen from a 452. separate flower or plant, has been rendered necessary, and provision must now be made for the transportation. In many cases, of which the - Feathery stigmas of a grass adapted to wind Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Andrews, Eliza Frances, b. 1840. New York, Cincinnati [etc. ] American book company
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