Sporangia clustered or gregarious, discoidal and umbilicate below, or lobed or convolute, greyish white, stipitate; stipe pale yellow, tapering upwards, stuffed with lime crystals, expanding into the yellowish, discoidal, recurving columella; capillitium colorless, more or less branching; spores dark purple-brown, irregularly reticulate, 9–12 µ.
Differs from D. squamulosum in the reticulate epispore. Brazil.
19. Didymium leoninum Berk. & Br.
- 1873. Didymium leoninum Berk. & Br., Jour. Linn. Soc., XIV., p. 83.
- 1876. Lepidoderma tigrinum Rost., App. to Mon., p. 23.
- 1909. Lepidodermopsis leoninus v. Höhnel, Sitz. K. Ak. Wiss. Wien, Math. Nat. Ks., CXVIII., 439.
Sporangia gregarious, sub-globose, covered more or less completely with white or yellowish deposits of crystalline lime, stipitate; stipes short, orange or brown, containing lime, enlarged to form the globose orange columella and often connected at base by a venulose hypothallus; capillitium of slender threads, anastomosing, colorless at the tips; spores violet-grey, minutely warted, 7–9 µ.
Like Lepidoderma tigrinum, but has different calcic crystals.
3. Diderma Persoon
- 1794. Diderma Persoon, Röm. N. Mag. Bot., I., p. 89.
- 1873. Chondrioderma Rost. Versuch, p. 13, Mon., p. 167.
- 1894. Chondrioderma Rost., List., Mycetozoa, p. 75.
- 1899. Diderma Persoon, Macbr., N. A. S., p. 92.
Sporangia plasmodiocarpous or distinct, sessile or stipitate; the peridium as a rule double, the outer wall generally calcareous with the lime granules globular, non-crystalline, the inner wall very delicate and often, in the mature fructification, remote from the outer; columella generally prominent.