BOLBITIUS, Fr.
grandiusculus, Cke. and Mass. P. 2.5-5 cm. thin, campan. exp. slightly striate, pale yellow, disc rufous; g. free, rusty ochre; s. 6-9 cm. narrowed upwards, hollow, white; sp. 15 × 5-6.
vitellinus, Fr. P. 3-5 cm. ovate then exp. viscid, egg-yellow, even then sulcate at the edge; g. adnexed, ochre then tan; s. 6-7 cm. equal, white, squamulose, hollow; g. 10 × 6.
Differs from B. flavidus in white stem, and from B. Boltoni in clear yellow p. not depressed at disc.
Boltoni, Fr. P. 3-4 cm. viscid, even, edge becoming sulcate, yellow then pale, disc darker and subdepr.; g. subadnate, yellow then livid fuscous; s. 4-5 cm. narrowed upwards, yellowish, at first flocculose; sp. 14 × 8.
flavidus, Bolton. P. 2-4 cm. glutinous, conical then exp. disc a little elevated, pale yellow, edge striate; g. almost free, yellow then brownish; s. 4-6 cm. slightly tapering, yellow; sp. 10 × 6.
fragilis, Fr. P. 1.5-2.5 cm. viscid, pellucid, edge striate, subumb. yellow then pale; g. yellowish then pale cinnamon; s. 4-7 cm. narrowed upwards, naked, glabrous, yellow; sp. 7 × 3.5. (14-15 × 8-9 Sacc.)
[bulbillosus, Fr. P. convex-campan. exp. not striate, pale yellowish fuscous; g. free, ventricose, rusty; s. attenuated upwards from a somewhat marginate bulb, whitish yellow, glabrous; sp. 10-14 × 8.
affinis, Mass. (sp. nov.) P. 1-2 cm. campan. then exp. umb. glabrous, dry, edge striate, yellowish tawny like the narrow, adnexed g.; s. 4-7 cm. attenuated upwards from a marginate bulb, white, shining; sp. 8 × 6.
Differs from B. bulbillosus in the pure white s., and umbonate, striate, tawny yellow p. which is whitish when dry.