Aggregate fruits, [118].
Agrestis, growing in fields.
Air-cells or Air-passages, spaces in the tissue of leaves and some stems, [131].
Air-Plants, [36].
Akene or Akenium, [120].
Ala (plural, alæ), a wing; the side-petals of a papilionaceous corolla, [92].
Alabastrum, a flower-bud.
Alar, situated in the forks of a stem.
Alate, winged.
Albescent, whitish, or turning white.