Textbook of Theoretical Botany, Volume 2 |
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Page 1293
... surface . Such are , for example , Potamogeton and Myriophyllum . Possibly because damp pollen is liable to germinate prematurely or because of the effect of surface tension , we find hydrophily employed only in the case of plants whose ...
... surface . Such are , for example , Potamogeton and Myriophyllum . Possibly because damp pollen is liable to germinate prematurely or because of the effect of surface tension , we find hydrophily employed only in the case of plants whose ...
Page 1296
... surface of the water . The movement thereon of the male flower is due FIG . 1226. - Vallisneria spiralis . Female flower with curled stigmas , held in the centre of a surface depression of the water , and free - floating male flowers ...
... surface of the water . The movement thereon of the male flower is due FIG . 1226. - Vallisneria spiralis . Female flower with curled stigmas , held in the centre of a surface depression of the water , and free - floating male flowers ...
Page 1368
... surface tension and are only rarely affected by the pressure of surrounding cells . The pressure exerted in an isolated sphere by surface tension varies inversely with its radius : P = 2 T / R , where T is the surface tension in dynes ...
... surface tension and are only rarely affected by the pressure of surrounding cells . The pressure exerted in an isolated sphere by surface tension varies inversely with its radius : P = 2 T / R , where T is the surface tension in dynes ...
Contents
FLOWERS | 1071 |
POLLINATION AN INTRODUCTION | 1252 |
SEEDS FRUITS AND SEEDLINGS | 1481 |
2 other sections not shown
Common terms and phrases
actinomorphic anatropous androecium Angiosperms anthers antipodal apex axile axis basal base bracts calyx capsule carpels cells colour common contains corolla corolla tube cotyledons cross-pollination cultivated dehisce Dicotyledons dispersal distributed elongated embryo sac enclosed endosperm example female flowers fertilization filaments fleshy floral florets Flowering shoot flowers Fig fruit funicle gardens genera genus germination gynoecium hairs herbs hermaphrodite hypocotyl important inflorescence inner insect integument involucre later layer leaf leaves lobes loculus male flowers margins mature micropyle Monocotyledons nectar Nectar is secreted normal nucellus nuclei occur oosphere outer ovary ovules parietal perianth perianth segments petaloid petals placenta plants pollen grains pollen tube pollination mechanism produced rarely receptacle rhizome seeds self-pollination sepals separate showing shrubs single sometimes species stage stamens stem sterile stigma structure style sub-family surface testa tissue trees tropical unisexual usually vegetative visited wall whorl zygomorphic