Textbook of Theoretical Botany, Volume 2 |
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Page 1305
... distributed pollen grains are gener- ally small and smooth - walled , while the grains of water - distributed pollen usually lack an extine . On the other hand , the pollen which will be distri- buted by insects is far more variable in ...
... distributed pollen grains are gener- ally small and smooth - walled , while the grains of water - distributed pollen usually lack an extine . On the other hand , the pollen which will be distri- buted by insects is far more variable in ...
Page 1782
... distributed mainly in temperate and subtropical regions though a few are found right into the tropics . The chief anatomical feature is the presence of internal phloem which may either closely adjoin the system of vascular bundles or ...
... distributed mainly in temperate and subtropical regions though a few are found right into the tropics . The chief anatomical feature is the presence of internal phloem which may either closely adjoin the system of vascular bundles or ...
Page 1805
... distributed in circumpolar regions during the Oligocene . From this it has been deduced that the family is of Arctic origin and travelled south during Tertiary times till it was more widely distributed than it is today . The ...
... distributed in circumpolar regions during the Oligocene . From this it has been deduced that the family is of Arctic origin and travelled south during Tertiary times till it was more widely distributed than it is today . The ...
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