[Y]

Hussey, “Mycol. Illust.” pl. 12.

[Z]

Bulliard, “Champ.” t. 268.

[a]

Cooke, “Easy Guide,” pl. 4, fig. 1; Hussey, “Illust.” vol. ii. pl. 40.

[]

Greville, “Scot. Crypt. Flora,” t. 166.

[c]

Ibid., t. 91.