. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 70 INTRODUCTION and movable by the wind; still more rarely the flowers, or floral parts, are quite immobile, or the anthers are explosive (cf. Delpino's groups, p. 62). Wind-flowers are also dichogamous or diclinous, so that self-pollination is entirely or partly prevented. A great many of our trees and shrubs, indigenous or introduced, that flower in spring, are pollinated by the wind, e.g. hazel (Corylus Avellana), alder (Alnus. Fig. 9. Arrhenatheru-m clat

. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 70 INTRODUCTION and movable by the wind; still more rarely the flowers, or floral parts, are quite immobile, or the anthers are explosive (cf. Delpino's groups, p. 62). Wind-flowers are also dichogamous or diclinous, so that self-pollination is entirely or partly prevented. A great many of our trees and shrubs, indigenous or introduced, that flower in spring, are pollinated by the wind, e.g. hazel (Corylus Avellana), alder (Alnus. Fig. 9. Arrhenatheru-m clat Stock Photo
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. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 70 INTRODUCTION and movable by the wind; still more rarely the flowers, or floral parts, are quite immobile, or the anthers are explosive (cf. Delpino's groups, p. 62). Wind-flowers are also dichogamous or diclinous, so that self-pollination is entirely or partly prevented. A great many of our trees and shrubs, indigenous or introduced, that flower in spring, are pollinated by the wind, e.g. hazel (Corylus Avellana), alder (Alnus. Fig. 9. Arrhenatheru-m clatius, M. ci K^ a wind-pollinated plant, (i) A closed anther. (2) A dehisced anther. (3) Spikelet with widely opened glumes, and anthers hanging down in still air. (4) Spikelet exposed to wind. The pendent anthers of one flower are discharging pollen; the anthers of another flower are empty; one anther has dropped from its filament; the anthers of a third flower that is still closed are just beginning to protrude, (i) and (2), x 12; (3) and (4), X5. (After Kerner.) glutinosa and incana), elm (Ulmus campestris, montana, and effusa), plane (Platanus orientalis and occidentalis), walnut (Juglans regia), beech (Fagus sylvatica), oak (Quercus pedunculata, sessiliflora), hornbeam (Carpinus Betulus), birch (Betula verrucosa, pubescens, humilis, nana), poplar (Populus alba, tremula, nigra, molinifera, balsamifera), ash (Fraxinus excelsior), and others. Well-marked cases of wind-pollina-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Knuth, Paul, 1854-1899; Knuth, Paul, 1854-1899; Mu?ller, Hermann, 1829-1883; Ainsworth Davis, J. R. (James Richard), 1861-1934. Oxford : Clarendon Press

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