=Pleurotus sulfureoides= Pk.--This rare species, first collected in the Catskill Mountains 1869, and described by Peck in the 23rd Report, N. Y. State Mus., p. 86, 1870, was found by me on two different occasions at Ithaca, N. Y., during the autumn of 1898, on rotting logs, Ithaca Flats, and again in Enfield Gorge, six miles from Ithaca. The plants are from 5--8 cm. high, the cap 3--5 cm. broad, and the stem 5--7 mm. in thickness, and the entire plant is of a dull, or pale, yellow. [Illustration: PLATE 37, FIGURE 110.--Pleurotus dryinus, form corticatus. Entire plant white, scales cream or buff in age sometimes. The ruptured veil shows in the small plant below (natural size). Copyright.] The =pileus= is nearly regular, fleshy, thin toward the margin, convex, umbonate, smooth or with a few small scales. The =gills= are rather crowded, broad, rounded or notched at the stem, pale yellow. The =spores= are elliptical, 7--9 × 5--6 µ. The =stem= is ascending and curved, nearly or quite central in some specimens in its attachment to the pileus, whitish or yellowish, mealy or slightly tomentose at the apex. Figure 111 is from plants (No. 2953, C. U. herbarium) on rotting log, Ithaca Flats, October, 1898. [Illustration: FIGURE 111.--Pleurotus sulfureoides. Entire plant dull or pale yellow (natural size). Copyright.] =Pleurotus petaloides= Bull. =Edible.=--The petal-like agaric is so called from the fancied resemblance of the plant to the petal of a flower. The plant usually grows in a nearly upright or more or less ascending position, or when it grows from the side of a trunk it is somewhat shelving. It is somewhat spathulate in form, i. e., broad at the free end and tapering downward into the short stem in a wedge-shaped manner, and varies from 2--10 cm. long and 1--5 cm. in breadth. It grows on fallen branches or trunks, on stumps, and often apparently from the ground, but in reality from underground roots or buried portions of decayed stumps, etc. [Illustration: FIGURE 112.--Pleurotus petaloides. Color pale reddish brown or brown, sometimes entirely white; gills white (natural size). Copyright.] [Illustration: FIGURE 113.--Pleurotus petaloides. More irregular form than that shown in figure 112; color same as there described (natural size). Copyright.]