The Origin of Floral Structures Through Insects and Other Agencies

4-merous adaptation to insect adhesion androecium anemophilous anthers appear arrangement arrested atrophy autogamy axial axis bear become bracts calyx capsules carpellary carpels cause cells chorisis cleistogamous Cloth cohesion colour condition corolla correlated crossed cylinder Darwin degeneracy degradation diclinism differentiated dorsal epidermis fact female flowers fertile fertilisation fibro-vascular cords filaments five floral whorls florets foliage Forms of Flowers genera genus hereditary hermaphrodite heterostyled honey hypertrophy Illustrations insect agency insects instances intercrossing irregular flowers irritation Journ Labiata latter leaf long-styled form male marginal Müller nature nectaries normally observed occur opposite leaves Orchids organs origin ovules papillæ pedicel Pelargonium perianth petaline petals petioles phyllotaxis pistil placentas pollen pollen-tubes position posterior Primula produced protandrous protogynous protoplasm receptacular tube regard result seedlings seeds seen self-fertilisation self-fertilised plants sepaline sepals short-styled showing species spiral stamens stigmas structure style superposed Teratology Tieghem tion tissue usually visited whorls