Radulum HYDNACE^E 389 



1758. R. orbieulare Fr. (from its frequent orbicular shape) a b c. 

 Orbicular, confluent; circ. flaxy, becoming waxy-fleshy, white to 



ochre-ivory ; mid. faintly vinous ; marg. white. Tub. short to 



long and broad to narrow, mere granules near the barren marg. 



Birch, oak, larch, cherry ; frequent. Oct. -Mar. 2 \ in. ; group 4§ in. 

 Ends of tubercles usually crested. 



1759. R. quereinum Fr. (from its habitat, oak, quercus) a b c. 

 Roundish, broadly confluent, innate, crustaceous, white to ochre- 

 white. Tub. round, stout, obtuse, scattered or fasciculate, 

 irregular in shape, floccoso-villous at apex ; marg. barren ; edge 

 pure white. 



Oak, sometimes on old squared oak timber. Nov. -Mar. 3J in. Some- 

 times confounded with 1716, 1723 and species of Irpex. 



1760. R. tomentosum Fr. (from its downy appearance, especially at 



the margin ; tomenium, down) a b c. 



Effused, innate, somewhat thick, opaque or translucent white ; 

 circ. swollen or erect, tomentose. Tub. short, crowded, angular, 

 obtuse, smooth, confluent, resembling white tomentum, smaller 

 at marg. 



Willow, mountain-ash, pine, sawdust. Dec. 5J in. 



1761. R. deglubens B. & Br. (from its habit of peeling from the 



matrix ; deglubo, to peel off) a. 

 Orbicular, ferruginous, somewhat diaphanous. Tub. erect, some- 

 what cylindrical, irregular, scattered, interstices even, pulverulent 

 with white spores. 



Naked wood, bark, ash. Jan. J in. ; group 5J in. Growing in troops of 

 small patches. 



1762. R. eorallinum B. & Br. (from its coral-like appearance) a. 

 Somewhat effused, very thin, pelliculose, shining white. Tub. 



fasciculate, fascicles \ in. or more across, surrounded by barren 

 sub., divided, obtuse, coralloid, white. 

 On partially lichen-covered branches, oak. Sept. Fascicles I in.; group 6 ir. 



1763. R. epileueum B. & Br. (from the hymenium growing upon a 



white subiculum ; Gr, epi, upon, leukos, white) a b. 



Effused. Hym. waxy, edge slightly upturned, pale, honey-colour. 

 Sub. forming a powdery white marg. Tub. scattered, distant, 

 cylindrical, short, under a lens fimbriate at apex, deciduous 

 exposing the sub. 



Decorticated wood. Aug. 8£ in. 



1764. R. fagineum Fr. (from the habitat, beech, fagus) a b. 

 Effused, somewhat fleshy, white or pale yellowish-brown ; marg. 



radiate with ivory-white myc. Tub. enlongate, round, varied, 

 entire, sometimes crested, white to sienna-white. 

 Chiefly on bark, rarely underneath, sometimes on birch. Nov. -Mar. 5§ in. 



\RaJulum aterrimum Fr. is not a Basidiomycete but apparently one of the 

 Dci)iatic(C Under the microscope the appearance is that of conceptacles 

 of Rhizoctonia crocoritm, but it bears 1-4-septate brown spores after 

 the manner of Cladosporium ; the fruiting branches are compacted together 

 and take the form of short, obtuse teeth, as in the compacted form of 



