=mustelina=, Fr. P. 5-7 cm. depr. edge upturned, even, opaque, brownish or dingy yellowish, flesh persistently white; g. crowded, thin, connected; s. 4-5 cm. even, white; sp. 7-8. II. Taste acrid. * _Gills yellow or ochraceous._ + _Pileus yellow or ochraceous._ =fellea=, Fr. Every part, outside and inside, pale ochraceous or straw colour, very acrid. P. 3-7 cm. exp. not becoming pale; g. adnate; s. even, 4-6 cm. Differs from _R. ochracea_ in being very acrid. =aurata=, Fr. P. 6-10 cm. rigid, exp. polished, citrin or orange, sometimes reddish, edge becoming striate, flesh under cuticle citrin; g. broad, shining citrin; s. 5-8 cm. white tinged yellow; sp. ----. [=rhytipes=, Fr. Foetid. P. depr. dry, yellowish, blotched purple or olive, corrugated, flesh sulphur yellow; g. broad, yellow, edge darker; s. conical, reticulately rugose, greyish purple. No account of mild or acrid taste is given, hence its position is uncertain. Has points in common with _R. aurata_. =claroflava=, Grove. P. 5-7 cm. bullate then plane, chrome yellow; g. white, lemon yellow, then tinged ochre; s. 3-6 cm. white then grey or blackish; sp. 8-9. Differs from _R. ochroleuca_ in bright yellow p. ++ _Pileus red or purple._ =rubra=, Fr. P. 3-9 cm. rigid, convex exp. depr. dusky blood red or with a tinge of purple, polished and even when dry; g. adnate whitish; s. 4-7 cm. hard, white sometimes tinged red; sp. 8-10. Differs from _R. atropurpurea_ in very acrid taste. =drimeia=, Cke. (= _R. expallens_, Gil.). P. 5-9 cm. firm, exp. depr. bright purple to rose colour; g. clear yellow; s. 4-8 cm. purple, paler than p.; sp. 7-9. Intensely acrid. =veternosa=, Fr. P. 4-5 cm. plano-depr. rosy or flesh colour then pale, slightly viscid; g. adnate, narrow, white then straw colour; s. 5-8 cm. spongy then hollow, white; sp. 7-9. =maculata=, Q. P. 5-8 cm. thin, firm, exp. viscid, reddish flesh-colour, then pale and blotched brownish; g. sulphur then peach colour; s. 3-4 cm. white or tinged rose, then spotted ochre; sp. 9-10. Differs from _R. depallens_ in being smaller, acrid, and stem not grey. =serotina=, Q. P. 2-2.5 cm. globose then more or less exp. purple brown or olive, edge lilac, with white bloom at first; g. almost free, white then tinged yellow; s. 2-3 cm. white; sp. 8-9. ** _Gills white._ + _Pileus ochraceous or umber._ =ochroleuca=, Fr. P. 7-9 cm. exp. depr. viscid at first, ochraceous then pale, disc cracked into granules, margin almost even; g. rounded behind, broad, subequal, whitish; s. 4-7 cm. soft, white then grey, reticulately rugulose; sp. 8-9. Differs from _R. granulosa_ in stem becoming grey. =granulosa=, Cke. P. 4-7 cm. exp. often depr. viscid at first, ochraceous, disc darker and granular; s. 4-7 cm. white, granular; g. nearly free, white; sp. 11-12. Close to _R. ochroleuca_, differing in granular persistently white stem.