e_, imperfectly developed.

_Acaulescent_, _acaulous_, having a very short stem or none.

_Acetabuliform_, cup-shaped.

_Acicular_, needle-shaped.

_Aculeate_, slender pointed.

_Acuminate_, terminating in a point.

_Acute_, sharp pointed.

_Adnate_, gills firmly attached to the stem.

_Adnexed_, gills just reaching the stem.

_Adpressed_, pressed in close contact, as applied to gills.

_Aeruginous_, verdigris-green.

_Agglutinated_, glued to the surface.

_Aggregated_, collected together.

_Alveolate_, socketed or honeycombed.

_Amphigenous_, when the hymenium is not restricted to a particular
surface.

_Analogy_, superficial or general resemblance without structural
agreement.

_Anastomosing_, branching, joining of one vein with another.

_Annular_, ring-shaped.

_Annulate_, having a ring.

_Annulus_, ring round the stem of agarics.

_Apex_, in mushrooms the extremity of the stem nearest the gill.

_Apical_, close to the apex.

_Apiculate_, terminating in a small point.

_Appendiculate_, hanging in small fragments.

_Approximate_, of gills which approach the stem but do not reach it.

_Arachnoid_, cobweb-like.

_Arboreal_, _arboricle_, tree-inhabiting.

_Arcuate_, bow-shaped.

_Areolate_, divided into little areas or patches.

_Argillaceous_, clayey, like clay.

_Ascending_, directed upward.

_Asci_, _ascidia_, spore-cases of certain mushrooms.

_Attenuated_, tapering gradually to a point upward or downward.

_Band_, a broad bar of color.

_Banded_, marked with bands.

_Barbed_, furnished with fibrils or hairs.

_Basidia_, cellular processes of certain mushroom-bearing spores.

_Bibliography_, condensed history of the literature of a subject.

_Bifurcated_, divided into two, as in the gills of certain agarics.

_Booted_, applied to the stem of a mushroom when inclosed in a sheath or
volva.

_Boss_, a knob or short rounded protuberance.

_Bossed_, _bullate_, furnished with a boss or knob.

_Branched_, dividing from the sides; also styled furcate and forked.

_Brick_, trade term for a mass of mushroom spawn, in dimensions the size
of a brick of masonry.

_Broad_, wide or deep vertically.

_Bulbous_, having the structure of a bulb.

_Caespitose_, growing in tufts.

_Calcareous_, chalky, chalk-like.

_Calyptra_, applied to the portion of volva covering the pileus.

_Campanulate_, bell-shaped.

_Canaliculate_, channelled.

_Cancellate_, latticed, mark