Resupinate, spread over the matrix, the fruiting surface external and
the pileus next the wood.

Revolute, rolled backward.

Rugose, wrinkled.

Rugulose, with minute wrinkles.

Saprophytic, growing on dead organic matter.

Sessile, where the pileus is attached directly to the matrix without
any stem.

Sinuate, said of the gills when they are notched at their junction
with the stem.

Stipe, the stem.

Sulcate, furrowed.

Squamulose, with minute scales.

Squarrose, with prominent reflexed scales.

Tomentose, with a dense, matted, hairy or woolly surface.

Trama, the interior portion of the gills or pileus.

Umbo, with a prominent boss or elevation, in the center of the pileus.

Umbilicate, with a minute abrupt depression in the center of the cap.

Veil, a layer of threads extending from the margin of the cap to the
stem (partial veil or marginal veil). A universal veil envelops
the entire plant.

Veins, elevated lines or folds running over the surface of the lamellae
in some species, and often connected so as to form reticulations.

Ventricose, enlarged or broadened at the middle, bellied.

Vesiculose, full of small rounded vesicles, as the trama of the pileus
of a Russula.

Volva, a wrapper or envelope, which in the young stage completely
surrounds the plant, same as universal veil. At maturity of the
plant it may be left in the form of a cup at the base of the stem,
or broken up into fragments and distributed over the cap and base
of the stem.

FOOTNOTES:

[F] The sub-class Ascomycetes includes the morels, helvellas, cup fungi,
etc., and many microscopic forms, in which the spores are borne inside a
club-shaped body, the ascus. Only a few of the genera are described in
this book, and the technical diagnosis will be omitted. See page 216.

[G] One American species in Texas.

INDEX OF GENERA, AND ILLUSTRATIONS.

NOTE.--In this index the generic and specific names have been
divided into syllables, and the place of the primary accent has
been indicated, with the single object of securing a uniform
pronunciation in accordance with the established rules of English
orthoepy.

Agaricus (A-gar'i-cus), 18--26.
arvensis (ar-ven'sis), 21, fig. 18.
campestris (cam-pes'tris), 1--9, 18, figs. 1--7, 12.
comtulus (com'tu-lus), 24, fig. 24.
c