48 Dansk Botanisk Arkiv, Bd. 2, Nr. 3. 



29. C. Hansenii n. sp. (Plate I, fig. k). 



Spores oval-ovate, 12—13 X7fi, dark grayish-brown, slightly pel- 

 lucid. Basidia 9—10 u diam.; paraphyses 17 — 18 u. Cystidia 

 vesiculous, somewhat bottle-shaped, with a short or rather long 

 neck, about 20 y broad. The surface of the cap is formed of 

 balloon-shaped or almost pyriform cells (16 — 24 (a broad). 



Fig. specim.: Hunderup, on the ground near a dead stump of 

 Populus, June 1902. — Also Horsens, 1908, and Lundeborg, Aug. 

 1914, on naked ground behind a garden-hedge. 



Cap at first oval-cylindric, VU—2 cm high, dark rufous 

 chestnut-brown (apex darker), naked, striate, then expanded, at 

 last flat, fisso-sulcate 2 / 3 way up (disc flat or slightly depressed), 

 3—472 cm across, of a lighter and paler brownish colour than 

 the bud. Stem rather tough, whitish (tinted slightly brownish), 

 inside sub-ochraceous, fistulöse, glabrous, top somewhat striate, 

 7 — 9 cm x 3 — 4 mm. Gills free, narrow, at first pale, then 

 ochaceous-brown, at last black, hardly diffluent. Subfasciculate. 



Having found no description anywhere of this characteristic 

 species I have named it C. Hansenii in commemoration of the 

 Danish biologist and mycologist Emil Chr. Hansen, author of 

 Fungi fimicoli Danici. 



30. C. sociatus Fr. (?). 



Spores ovate-oval, 12 x 7 u, dark gray-brown, slightly pellucid. 

 Sporepowder brownish black. Cystidia somewhat bottleshaped 

 with a broad neck, 20 — 25 \i broad. Surface of cap made up 

 of globular or balloonshaped cells, 25 — 40 |a diam., hyaline or 

 slightly brownish. 



Fig. specim.: Hjallese, solitary growing on border of wood- 

 path, July 1914. Cap campanulate, 1 cm high, at last expanded, 

 up to 2 cm across, surface grayish- ochraceous-brown, apex sub- 

 fulvous, naked (without veil) but (sub lente) seen to be formed of 

 glistening particles (globular cells), at first deeply striate, then 

 fisso-sulcate almost to apex. Stem 5 cm x l 1 ^ mm, apex slightly 

 dilated, glabrous, whitish. Gills lanceolate-linear, free, soon 

 blackish. 



This plant differs from the description of C. sociatus by its 

 solitary habit. Its microscopic characters are almost like those 

 of no : 29, but it has the stature of C. plicatilis, from which it 

 is however easily recognized by the spores, by the cap not 

 having a depressed disc, by the darker brown colour and the glitte- 

 ring surface-cells. From large forms of C. ephemerus it differs 

 in having no setulæ on surface of cap. 



31. C. plicatilis (Curt). 



Spores subrotund-lemonshaped (almost like the seeds of Poly- 

 gonum lapathifolium) somewhat flattened, 97 2 — 11x8—972 H 



