Category: D
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Didynamous
(Of stamens) in two pairs of unequal length. In two pairs, the pairs not being of the same reach. Having two pairs of stamens—the one shorter than the other. With two pairs of stamens of different lengths.
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Didymous
In pairs; Divided into two lobes; (Of anthers) two-lobed with a very short connective. A strongly lobed fruit, thus appearing as a pair.
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Dictyostelic
(Anatomical) relating to a vascular cylinder with large overlapping leaf gaps.
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Dicotyledon
Flowering plants of which the embryos have two seed leaves. An angiosperm having two cotyledons (seed leaves); usually the leaves are net-veined, and floral parts are in fours or fives. A plant having two seed leaves (cotyledons); one of the two major divisions of flowering plants.
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Diclinous
With all flowers unisexual, thus stamens and ovaries are in separate flowers.
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Diclesium
Small dry indehiscent single-seeded fruit (or achene) enclosed within a free but persistent perianth envelope [unusual term].
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Dichotomy
Forking, dividing in two. The division or forking of an axis into two more or less equal branches.
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Dichotomous key
Identification key that gives two alternative choices, each of which leads to the next couplet of choices or to the name of the taxon being ‘keyed out’.
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Dichotomous
Forking, dividing into two equal branches. Forking, each branch dividing into two equal branches.
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Dichopodium
Sympodial branch system that is made up of successive parts of a dichotomising branch system, of which only one of each pair of branches forms part of the main axis.