=tigrinum=, Schaeff. P. 3-5 cm. exp. often wavy, glabrous, margin invol. pale brown or greyish with brown spots; g. crowded, narrow, white then greyish; s. 2-3 cm. and nearly as thick, solid, white, pruinose; sp. subgl. 8. Differs from _T. guttatum_ in glabrous pileus with an even margin. [=leucophaeatum=, Karst. (= _Coll. leucophaeatus_, Fr.). P. convexo-plane, broadly and obtusely umb. pallid grey; with thin hoary tomentum; g. crowded, whitish then dingy, broadest behind; s. equal, often curved, pallid, base strigose; sp. ----. =pes-caprae=, Fr. P. 2-5 cm. conical then exp. umb. unequal, greyish brown, glabrous; g. broad, greyish white; s. 6-7 cm. naked, white; sp. 8 x 5. var. _multiforme_, Schaeff. P. irreg., caespitose, smaller than type. VI. SPONGIOSA. _Pileus compact then spongy, obtuse, even, glabrous, not hygrophanous._ * _Gills not discoloured._ =Schumacheri=, Fr. P. 6-7 cm. exp. obtuse, livid grey, even, moist, edge beyond gills incurved; g. narrow, crowded, pure white; s. 6-8 cm. white, solid, fibrillosely-striate; sp. ----. [=amicus=, Fr. P. fuscous; g. distant, white; s. bulbous, solid, white. =patulum=, Fr. P. 5-8 cm. plane, obtuse, wavy, even, glabrous, pale grey or pallid; g. sides veined, pallid; s. elastic, equal, glabrous, 5-8 cm.; sp. 7-8 x 4. =circumtectum=, Cke. and Mass. P. 5-8 cm. dry, obt. or subumb. wavy, margin incurved, downy, greenish olive then tan; g. white; s. 3-4 cm. whitish, striate, base pointed; sp. subgl. 4-5. [=maluvium=, Fr. P. campan.-convex, obtuse, glabrous, greenish; g. rounded, crowded, pallid; s. solid, firm, elastic. [=conglobatum=, Vit. Densely clustered. P. unequal, even, edge thin, inflexed, somewhat pruinose, blackish fuscous; g. free; s. stems solid, ventricose, subtomentose, springing densely from a common tuber. =arcuatum=, Bull. P. 5-8 cm. brownish white then tan, exp. margin incurved, glabrous, flesh-coloured; g. arcuate, crowded, white; s. 4-6 cm. solid, fibrilloso-squamulose, pale brown, base darker, bulbous; sp. ----. Differs from _T. panaeolum_ in having white gills, and from _T. melaleucum_ in having coloured flesh. var. _cognatum_, Bull. Larger. Gilvous outside and inside or dingy tan; p. obtuse, discoid; g. tan. _oreinum_, Fr. P. 2-3 cm. soon plane, obtuse, glabrous, fuscous, even; g. rounded, free, white; s. solid, short, 2-3 cm. whitish, apex white squamulose; sp. ----. Separated from _T. humile_ by the gills projecting beyond the margin of pileus. =album=, Schaeff. Entirely white, taste acrid. P. 6-9 cm. convex then depr. even, glabrous, dry, disc sometimes tinged yellow; g. rather crowded; s. 6-8 cm. narrowed upwards, solid, elastic; sp. 5-6 x 3. var. _caesariatum_, Fr. P. white or yellowish, exp. fibrillosely silky, then glabrous; s. slender, fragile, apex rather mealy; g. nearly free.