The Manual of the Botany of the Northern United States / Including the District East of the Mississippi and North of North Carolina and Tennessee

by Asa Gray

Antheriferous. Anther-bearing.

Antherizoid. One of the minute organs developed in an antheridium, corresponding to pollen-grains.

Anthesis. The time of expansion of a flower.

Apetalous. Having no petals.

Apical. Situated at the apex or tip.

Apiculate. Ending in a short pointed tip.

Appressed. Lying close and flat against.

Aquatic. Growing in water.

Arachnoid. Cobwebby, of slender entangled hairs.

Archegonium. The organ corresponding to a pistil in the higher Cryptogams.