Category: H
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Hood
3-dimensional shape with the sides and apex curved inwards. The curing or folded, petal-like structures interior to the petals and exterior to the stamens in milkweed flowers (Asclepias species); because most milkweeds have reflexed petals, the hoods are typically the most prominent feature of the flowers.
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Honeyguides
Streaks or blotches of colour leading to the glands or nectaries secreting the nectar. A set of coloured streaks and/or blotches on the perianth of a flower that point to the nectary.
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Honey
Sweet secretion from glands or nectaries that is processed by bees. The first sweetener used by humans, honey has long been associated with pleasure and happiness: in the Old Testament, for example, the Promised Land of the Israelites is said to be flowing with milk and honey. The word honey itself is likewise of ancient…
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Homotypic synonym
(In nomenclature) synonym based on the same type as another synonym; also known as an obligate, objective or nomenclatural synonym. The synonymy of the two names is not a matter of taxonomic opinion but absolute.
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Homostylous
Of a species with flowers with styles (and usually stamens) uniformly positioned.
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Homostylic
Of a species with flowers with styles (and usually stamens) uniformly positioned.
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Homosporous
(In pteridophytes) with spores of one kind. In botany, having but one kind of spore.
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Homoplasy
In cladistics) convergent evolution but independent origin, with a shared character that is similar but not derived from a common ancestor.
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Homophyllous
(Of a plant or species) with leaves of one kind, as opposed to heterophyllous.
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Homonym
(In nomenclature) identical names for different taxa (of which only one name can be correct).