. Botany of the living plant. Botany. 240 BOTANY OF THE LIVING PLANT give the flower a lop-sided form ; but almost always so that it can be divided by at least one plane of symmetry into two equivalent halves. Such flowers are called dorsiventral, or zygomorphic, and the Aconite, Laburnum, and Toadflax are examples (Fig. 189). The plane of symmetry is usually the median plane ; but sometimes it is oblique, as in the Horse Chestnut ; or transverse, as in Corydalis. Zygomorphy is very common, it occurs in most families, and it is characteristic of some throughout, as in the Orchidaceae, or Labia
. Botany of the living plant. Botany. 240 BOTANY OF THE LIVING PLANT give the flower a lop-sided form ; but almost always so that it can be divided by at least one plane of symmetry into two equivalent halves. Such flowers are called dorsiventral, or zygomorphic, and the Aconite, Laburnum, and Toadflax are examples (Fig. 189). The plane of symmetry is usually the median plane ; but sometimes it is oblique, as in the Horse Chestnut ; or transverse, as in Corydalis. Zygomorphy is very common, it occurs in most families, and it is characteristic of some throughout, as in the Orchidaceae, or Labiatae. Its importance lies in relation to the transfer of pollen by animal agency. The most. 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 Bower, F. O. (Frederick Orpen), 1855-1948. London, Macmillan and co. , limited
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
