140 E>iDOSPOREAE [LEPIDODERMA 



species ; the spores appear warted under a high magnifying power, 

 though the warts are faint from their unripe condition ; the French 

 specimen is part of the large gathering by Roussel, and is given as an 

 example of L. tigrinum by Rostafinski (Mon., p. 188). 



Hab. On fir wood, moss, etc. — Loighton, Beds (B.M. 1360) ; North 

 Wales (B.M. 2517) ; Inverary, N.B. (K. 568) ; France (K. 1555) ; 

 Sweden (B.M. 2519); Denmark (K. 1557); Germany (B.M. 2518); 

 Italy (Strassb. Herb.) ; Massachusetts (B.M. 1361J : Washington 

 State (B.M. 2520). 



2. L. Carestianum Rost. Mon., p. 188 (1875). Plas- 

 modium dirty white. Sporangia subglobose, often confluent, 

 or forming short or elongate pulvinate plasmodiocarps, 1 to 

 15 mm. long, 0*5 to 1 mm. thick, brownish-grey, closely beset 

 with white crystalline scales of lime ; sporangium-wall cartila- 

 ginous, dark brown. Columella hemispherical, or hardly 

 evident and represented by the thickened dark brown base of 

 the sporangium- wall, enclosing rounded nodules of lime. 

 Capillitium of colourless or purple-brown branching and 

 anastomosing threads 1 to 2/x thick. Spores dark purplish - 

 grey, minutely spinulose, 10 to 15 /x diam. — Mass. Mon., 255 ; 

 Schinz Myxom. Schweiz, 63. Reticularia Carestiana Rabenh. 

 Fung. Eur., no. 436 (1862). 



Var. 1. — Chailletii Lister : sporangia globose or hemi- 

 spherical, 0-5 to 1 mm. diam., sessile, shortly stalked or 

 forming plasmodiocarps, grey or drab, with close-set crystal- 

 line scales of lime, usually seated on a well-developed brown 

 scaly hypothallus ; sporangium-wall cartilaginous, yellowish ; 

 stalk brown, 0*1 to 0-2 mm. high, containing like the columella 

 abundant lime- nodules ; columella pale or dark brown, rarely 

 orange, clavate, hemispherical or scarcely evident ; capillitium 

 more slender than in the type ; spores 10 to 13 /*. diam. — 

 Lister in Journ. Bot., xlvi. 218 (1908). Lepidoderma Chailletii 

 Rost. Mon., p. 189, fig. 179 (1875). 



Var. 2. — granuliferum Lister : sporangia hemispherical or 

 forming elongate plasmodiocarps ; columella hemispherical 

 or hardly developed ; capillitium of branching and anastomos- 

 ing purplish-brown threads, with a few expansions, each 

 enclosing one or two rounded nodules of lime, 20 to 30 jx 

 diam., or forming a dense network of nearly colourless threads 

 expanded at the nodes to form star-shaped vesicles, each 

 usually enclosing a nodule of lime ; spores purple-brown, 12 

 to 18 fx diam.- — Schinz Myxom. Schweiz, 63 (1906). Didymium 

 granuliferum Phill. in Grev., v. 114, t. 88, f. 1 a-f (1877). 

 Badhamia granulifera Mass. Mon., 321 (1892). Lepidoderma 

 granuliferum Fr. in Arkiv. Bot., vi. no. 7, p. 3 (1906). 



PI. 115. — a, plasmodiocarp (Switzerland); b. sporangia of var. granuliferum (Blue 

 Canon, California) ; c. capillitium and spores of the same ; d. spores with fragment 

 of sporangium-wall showing a crystalline scale, and capillitium partly normal, partly 

 with expansions enclosing lime-nodules (Switzerland). 



