Pruinose (of the cap and stem-surfaces), finely powdered.
Pubescent (of the cap and stem-surfaces), with short, soft hairs.
Putrescent (of the fruit-body), soft and very easily decaying.
Pyriform (of the spore), pear-shaped.
Regular (of the gill-trama in transverse longitudinal section), with hyphae showing no distinct curvature and practically parallel to the gill-surfaces. See [Fig. 9C], [p. 17].
Remote (of the gills or tubes), separate from the stem by a zone of cap-flesh. See [p. 267].
Resupinate (of the fruit-body), spore-bearing tissue facing outward and attached to support by what would have been the cap had the fungus been a normal agaric.
Ring, a girdling veil on the stem. See [p. 267].
Rugulose (of a surface), covered in small wrinkles.
RUST-BROWN, the colour of rusty iron.