iform_, pear-shaped.

_Quaternate_, arranged in groups of four.

_Receptacle_, a part of the mushroom extremely varied in form,
consistency, and size, inclosing the organs of reproduction.

_Remote_, when the margin of the gill comes to an end before reaching
the stem.

_Reniform_, kidney-shaped.

_Repand_, bent backwards.

_Resupinate_, of mushrooms spread over the matrix without any stem and
with the hymenium upwards; inverted by twisting of the stalk.

_Reticulate_, marked with cross lines like the meshes of a net.

_Revolute_, rolled backwards; of the margin of a cap, the opposite of
involute.

_Rhodospore_, rose or pink spore.

_Rimose_, cracked.

_Ring_, a part of the veil adhering to the stem of a mushroom in the
shape of a ring.

_Rivulose_, marked with lines like rivulets.

_Rubiginous_, rust colored.

_Rufescent_, reddish in color.

_Rugose_, wrinkled.

APPENDIX B.

Through the courtesy of Mr. Hollis Webster, Secretary of the Boston
Mycological Club, the following list of mushrooms, which have been
collected and eaten by members of that club during the past year, has
been supplied to me:

AMANITA.

A. _Caesarea_ Scop., "True Orange."
A. _rubescens_ Persoon.
A. _vaginata_ Bull.

LEPIOTA.

L. _procera_ Scop., "Parasol Mushroom."
L. _rachodes_ Vilt.
L. _Americana_ Pk.
L. _naucinoides_.

ARMILLARIA.

A. _mellea_ Vahl, "Honey Mushroom."

TRICHOLOMA.

T. _equestre_ L.
T. _sejunctum_ Low, "Yellow Blusher."
T. _portentosum_ Fr.
T. _coryphacum_ Fr.
T. _russula_ Schaeff.
T. _columbetta_ Fr.
T. _gambosum_ Fr., "St. George's Mushroom."
T. _personatum_.
T. _nudum_.

HYGROPHORUS.

H. _virgineus_ Fr.
H. _fuligineus_ Frost.
H. _flavo discus_ Frost, "Yellow Sweet-Bread."
H. _hypothejus_ Fr.
H. _puniceus_ Fr.

LACTARIUS.

L. _piperatus_ Fr.
L. _deliciosus_ Fr.
L. _volemus_ Fr.

RUSSULA.

R. _virescens_ Fr.
R. _lepida_ Fr.
R. _punctata_ Gt.
R. _aurata_ Fr.
R. _ochracea_ Fr.
R. _alutacea_ Fr.

CANTHARELLUS.

C. _cibarius_ Fr.
C. _umbonatus_ Fr.

MARASMIUS.

M. _oreades_ Fr., "Fairy Ring."
M. _scorodonius_ Fr.
M. _alliaceus_ Fr.

HYPHOLOMA.

H. _sublateritium_ Schaeff.
H. _candolleanum_ Fr.
H. _perplexum._
H. _appendiculatum_ Bull.

COPRINUS.

C. _comatus_ Fr