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Spermaries are produced more readily than ovaries; they are mammillate in form and number from 4 to 24.

P. 3-6 cm. convex then plane, mammillate, centre pale yellowish, somewhat silky, rest glabrous, even, dry, whitish; g. broad, emarginate, whitish; s. white, base yellowish, solid, equal; flesh white, insipid and inodorous.

P. convex, mammillate, squamulose; g. emarginato-adnexed; s. hollow, equal, flexuous; sp. smooth.

P. convex, mammillate, brown, silky white tomentum everywhere except umbo; g. nearly free, rusty brown; s. equal, pubescent, rusty, not bulbous; sp. rough, 9-10 � 4-5. flocculosa, Berk.