Textbook of Theoretical Botany, Volume 2 |
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Page 1143
... involucre . Involucres are very varied in appearance . In Dianthus we have a simple involucre with four bracts , in two decussate pairs , set very close to the flower and resembling a calyx . The Ranunculaceae display all types of involucre ...
... involucre . Involucres are very varied in appearance . In Dianthus we have a simple involucre with four bracts , in two decussate pairs , set very close to the flower and resembling a calyx . The Ranunculaceae display all types of involucre ...
Page 1144
... involucre . ( After Le Maout and Decaisne . ) of five parts , which really belongs to the cyme but looks exactly like the calyx of the flower . Another well - known example is the cupule or involucre of Corylus , the Hazel , which ...
... involucre . ( After Le Maout and Decaisne . ) of five parts , which really belongs to the cyme but looks exactly like the calyx of the flower . Another well - known example is the cupule or involucre of Corylus , the Hazel , which ...
Page 1241
... involucral tube , covered externally with hooked processes ( Fig . I 196 ) . The involucre encloses two naked , female flowers , which stand in the axils of two modified bracts which are united to form a sheath around each flower ...
... involucral tube , covered externally with hooked processes ( Fig . I 196 ) . The involucre encloses two naked , female flowers , which stand in the axils of two modified bracts which are united to form a sheath around each flower ...
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