Part 23

Obovate, inversely egg-shaped, broadest at the apex.

Obtuse, blunt or rounded.

Ochrospore, ochre-colored spore.

Orbicular, having the form of an orb.

Order, group of a classification intermediate between tribe and family.

Ostiole, ostiolum, mouth of the perithecium; orifice through which the spores are discharged.

Ovate, egg-shaped.

Pallid, pale, undecided color.

Papillate, papillose, covered with soft tubercles.

Paraphyses, sterile cells found with the reproductive cells of some plants.

Parasitic, growing on and deriving support from another plant.

Partial, of a veil clothing the stem and reaching to the edge of the cap but not extending beyond it.

Patent, spreading.

Pectinate, toothed like a comb.

Pedicel, foot-stock.

Pedicillate, having a pedicel.

Pelliculose, furnished with a pellicle or distinct skin.

Penciled, with pencil-like hairs either on the tip or border.

Peridium, general covering of a puff-ball, simple or double, dehiscent or indehiscent at maturity.

Perithecia, bottle-like receptacles containing asci.

Peronate, used when the stem has a distinct stocking-like coat.

Persistent, inclined to hold firm, tenacious.

Pervious, forming an open tube-like passage.

Pileate, having a cap.

Pileoli, secondary pilei; arising from a division of the primary pileus.

Pileus, the cap, receptacle, or one part of a mushroom; other parts are the stem and gills.

Pilose, covered with hairs.

Pits, depressions in cells or tubes resembling pores, applied also to hollow depressions in the surface of the cap of the morel.