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

Ob´ligate-Parasite, can only grow as a parasite; see facultative parasite.

Ob´ligate-Saprophyte, can only grow as a saprophyte. See [Facultative Saprophyte].

Ob´long, two or three times longer than broad, with nearly parallel sides.

Obo´vate, inversely ovate, having the broad end upward or toward the apex.

Obpyr´iform (ob + pyriform, pear-shaped), inversely pear-shaped.

Ob´solete, indistinct, very imperfectly developed; hardly perceptible.

Obtuse´, blunt or rounded.

Ochra´ceous, O´cherous, O´chreous, O´chroid, O´chry, O´chrous, O´chery (ochre, ocher, + aceous), ocher-yellow; brownish-yellow.

Ochra´ceous-Rufous (ochraceo-rufus). (Yellow ocher + burnt sienna + light red.)

Ochre Yellow (ochraceo-flavus). The color of the pigment called yellow ocher.