Appendage, any superadded part. Appendiculate, provided with appendages.
Appressed, close pressed to the stem, &c.
Apricus, growing in dry and sunny places.
Apterous, wingless.
Aquatic (Aquatilis), living or growing in water; applied to plants whether growing under water, or with all but the base raised out of it.
Arachnoid, Araneose, cobwebby; clothed with, or consisting of, soft downy fibres.
Arboreous, Arborescent, tree-like, in size or form, [39].
Arboretum, a collection of trees.
Archegonium (plural archegonia), the organ in Mosses, &c., which is analogous to the pistil of Flowering Plants.
Arcuate, bent or curved like a bow.