tympanum |
In frogs and toads, the round hearing organ on the sides of their heads.
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umbel |
A flower cluster with flower stalks radiating from a single point.
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umbels |
Plural of umbel.
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umbilicus |
In snails, the depression or hole at the center of the shell's whorls.
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undertail coverts |
The undertail coverts are the feathers just before the tail feathers on the under side of the bird.
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universal veil |
A layer of tissue that covers the entire mushroom during the initial stages of development.
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uppertail coverts |
The uppertail coverts are the feathers between the rump and the tail on the upperside of the bird.
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ventral |
Referring to the underside of an insect or the underside of the wing of an insect.
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volva |
The cup-like remains of universal veil tissue around the base of the mushroom stalk.
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wattle |
The wattle is a fleshy growth hanging from the neck or head.
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whorled |
When pertaining to leaves - three or more leaves from the same node on a stem.
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winter annual |
The seeds sprout during the summer, over-winter underground and complete their life cycle the next growing season.
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WLC |
Gilbert M. and Martha H. Hitchcock Wetlands Learning Cemter
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woody |
When pertaining to plants, persisting through winter; i.e. not dying back like herbs.
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woody vine |
A vine with a woody stem which persists through winter - compare to herbaceous.
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