Toadstools, mushrooms, fungi, edible and poisonous; one thousand American fungi / How to select and cook the edible; how to distinguish and avoid the poisonous, with full botanic descriptions. Toadstool poisons and their treatment, instructions to students, recipes for cooking, etc., etc.

by Charles McIlvaine; Robert K. Macadam

Ochros´poræ (Gr—pale yellow), a group of fungi having ocher or brown-colored spores.

Oleag´inous (oleum, oil), oily or oil-like.

Oliva´ceous, Olive (olivaceus, olivinus), a greenish-brown color like that of olives (Sepia + light zinnober-green.)

Olive-Buff (olivaceo-luteus). (Yellow ocher + cobalt-blue + white.)

Olive-Green (olivaceo-viridis), a peculiar color, produced by the mixture of yellow and gray, resulting in a tint somewhat between olive and dull yellowish-green.

Olive-Yellow (olivaceo-flavus). (Light-cadmium + black + white.)

Opaque´, Opake´, mostly used in the sense of dull, not shining.

Oper´culum (operculum, a lid, cover, < operire, cover, shut, conceal), a lid-like cover.

Orange (aurantius), a deep reddish-yellow like the rind of an orange.

Orange-Rufous (aurantio-rufus). (Neutral-orange or cadmium-orange + light-red.)