Textbook of Theoretical Botany, Volume 2 |
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Page 1384
... nucellus around the embryo sac and in a track up to the nucellar apex below the micropyle . After fertilization all this disappears and a secondary deposit appears at the base of the ovule , probably related to nutrition during ...
... nucellus around the embryo sac and in a track up to the nucellar apex below the micropyle . After fertilization all this disappears and a secondary deposit appears at the base of the ovule , probably related to nutrition during ...
Page 1389
... nucellus . This may perhaps facilitate penetration by the pollen tube . There is no record of any endothelial layer lining the micropyle , even in species with massive integuments . The lining cells are apparently not specially modified ...
... nucellus . This may perhaps facilitate penetration by the pollen tube . There is no record of any endothelial layer lining the micropyle , even in species with massive integuments . The lining cells are apparently not specially modified ...
Page 1393
... nucellus around the fertilized embryo sac . A singular phenom- enon is seen in the ovules of many Podostemaceae . The outer integument de- velops first and envelops the nucellus , forming the micropyle . The inner in- tegument develops ...
... nucellus around the fertilized embryo sac . A singular phenom- enon is seen in the ovules of many Podostemaceae . The outer integument de- velops first and envelops the nucellus , forming the micropyle . The inner in- tegument develops ...
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