Textbook of Theoretical Botany, Volume 2 |
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Page 1200
... walls . One of two things may then happen . If , as in the majority of flowers , the thickening bands are strongest towards the inner side , then the outer cell walls contract most and the sporangial wall curls outwards , exposing the ...
... walls . One of two things may then happen . If , as in the majority of flowers , the thickening bands are strongest towards the inner side , then the outer cell walls contract most and the sporangial wall curls outwards , exposing the ...
Page 1362
... wall ; e.g. , Allium , Cobaea , Senecio . Here also the pollen tube is a direct prolongation of the whole wall thickness . The great majority of pollen grains , however , have two distinct walls , the extine ( or exine ) and the intine ...
... wall ; e.g. , Allium , Cobaea , Senecio . Here also the pollen tube is a direct prolongation of the whole wall thickness . The great majority of pollen grains , however , have two distinct walls , the extine ( or exine ) and the intine ...
Page 1457
... wall is transverse , but one or both of the daughter cells divide transversely . Examples are : Ericaceae generally , and Annonaceae . 4. The primary wall is oblique . Example , Myosotis arvensis , where the two cells formed are of ...
... wall is transverse , but one or both of the daughter cells divide transversely . Examples are : Ericaceae generally , and Annonaceae . 4. The primary wall is oblique . Example , Myosotis arvensis , where the two cells formed are of ...
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