=alternatus=, Fr. P. hemisph. then discoid, even, glabrous, chalk-white disc pale umber, 3 cm.; g. adnate; s. whitish, hollow, 7-10 cm.; sp. 10 x 6-7. =digitalis=, Fr. P. ovate then campan. whitish disc darker, glabrous, striate up to disc, 2.5 cm.; g. slightly adnexed; s. 3-5 cm. whitish, equal; sp. ----. When mature the p. is sometimes livid olive or yellowish grey, and g. appear to be adnate. [=diaphanus=, Q. Every part translucent and glabrous. P. grooved, edge crenulate, silvery with a central tawny spot, 5-7 mm.; g. adnate; s. capillary, glabrous, 2-3 cm.; sp. 12 long. Differs from _C. plicatilis_ in adnate g. [=sceptrum=, Fr. P. campan. papillately umb. deeply sulcate, pellucid, tinged grey; g. adnate to a collar; s. pellucid. =erythrocephalus=, Fr. P. cylindrical then campan. reddish vermilion becoming grey, silky, edge very finely striate, 1 cm.; g. slightly adnexed; s. 2-3 cm. paler than p. ++ _Gills free, sometimes attached to a collar._ # _Stem downy or pulverulent._ [=Godeyi=, Gillet. P. subglobose, distantly grooved, glabrous, pellucid, disc ochre, grey between the ribs, 3-4 mm.; g. free; s. 2 cm. pellucid, sprinkled with white flecks below. [=semistriatus=, Pat. P. ovate then campan. glabrous, disc even, yellowish, striate and grey up to disc, 1 cm.; g. attached to a collar; s. 1-2 cm. white, pruinose; sp. subcircular, compressed, 12-14 broad, 3 thick. ## _Stem glabrous._ =plicatilis=, Fr. P. thin, cylindric ovate then plane, glabrous, coarsely grooved, pale brown then greyish, disc broad, even, at length depr. darker, 1-2 cm.; g. attached to a distant collar; s. 5-8 cm. white, smooth, hollow; sp. 11-13 x 8-9. =deliquescens=, Fr. P. ovate then campan. at length exp. livid grey, disc rufescent, papillose, otherwise glabrous, 3-7 cm.; g. free; s. 7-10 cm. white, glabrous, hollow; sp. 8 x 5. Differs from _C. atramentarius_ in free gills. [=miser=, Karst. P. subglobose then exp. pellucid, tinged grey, plicate, glabrous; g. distant from stem, few in number; s. hyaline, glabrous; sp. 7-9 x 6-8. =eburneus=, Q. Entirely white, shining; elliptic-campan. firm, striate, rarely with a few flecks, 3-4 cm.; g. free; s. firm, glabrous; sp. 14 long. =hemerobius=, Fr. P. ovate then campan. 1.5-2.5 cm. coarsely grooved, disc even, bay, not depr.; g. attached to an imperfect collar; s. 5-8 cm. fragile, pallid; sp. 10-12 x 7. Differs from _C. velaris_ in imperfect collar, and from _C. plicatilis_ in disc not being depressed. [=rapidus=, Fr. P. cylindrical then plane, coarsely grooved, pale drab, glabrous, often slightly wavy, 1.5-2.5 cm.; g. free, close to stem, brown; s. 4-5 cm. white, glabrous. [=phyllophilus=, Karst. P. campan. then exp. glabrous, sulcate, dingy ochre becoming sooty; g. close to stem; s. pellucid, pruinose then naked; sp. angularly ovate, 7-8 x 5.