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Similar to D. betulina (cf. Bull. t. 537. f. 2.), and not dissimilar to Polyporus lutescens due to its form, color, and zoned, tomentose pileus, but it differs greatly in the sinuses. These sinuses, slightly shining, agree with D. gibbosa, but differ in the much thinner dissepiments dividing walls. The zones on the pileus are numerous, concentric, and alternately prominent.
19. quercina, pale brownish, with a hard, slightly wrinkled, sub-glabrous pileus, with thick, variously interlaced sinuses. Syn. fung. p. 500. Agaricus L. Sowerb. t. 181. Trattin. Fung. Austr. p. 19. t. 2. f. 3. (with darker color).
β. flexilis, with a dimidiate halved, convex, obsoletely zoned, glabrous pileus, scabrous at the base, with very broad gills that are for the most part simply branched-dichotomous forked in pairs, and horizontal. Syn. fung. var. 1.
It occurs rarely in Germany and France. Perhaps it is a distinct species. It is very smooth to the touch, and has a uniform shape; it is also of a dark, sordidly brownish color; the zones are narrow and almost vanished. The gills at the base, where it is attached to the pileus, are over an inch wide and flexible.
γ. platypora, broad, whitish, resupinate lying flat against the substrate, thick, with broad, sub-round sinuses.
Very rare in France. It mimics a Polyporus.
δ. ovata, small, resupinate, convex, slightly attenuated tapered on both sides, with sub-equal sinuses diverging from the center. Tab. XVIII. f. 1.
Sent from Calabria by the late Thomas.