444 FUNGUS-FLOE A. 



Stilbum tomentosum. Schr. 



Gregarious, every part pure white, stem slender, tomen- 

 tose ; head subrotund becoming opaque ; conidia globose, 

 2-3 p. diameter. The plants spring from an effused white, 

 creeping mycelium. 



Stilbum tomentosum,, Schr., Journ., 1799, ii. p. 65, t. 3, f. 2; 

 Sacc., SylL, iv. n. 2677. 



Very minute. Parasitic on various species of Myxogastres, 

 as Trichia, Didymium, Arcyria, &c. 



Stilbum erythrocephalum. Ditm. 



Gregarious or scattered, stem rather thick, tomentose, 

 whitish, terminating in a turbinato-globose, rosy or deep red 

 head ; conidia elliptical, 4-6 X 22 3 p., hyaline, borne on 

 slender, septate, colourless conidiophores that are nodulose 

 at the apex, 50-60 X 3-3-5 p. 



Stilbum erythrocephalum, Ditm. in Sturm. D.C., t. 45 ; Sacc., 

 Syll., iv. n. 2680. 



On damp dung of rabbits, pigeons, &c. 



Stilbum vulgare. Tode. 



Stems gregarious, fibrous, smooth, elongated, becoming 

 thinner upwards, white, then yellowish; head globose, 

 white, then yellowish ; conidia elliptical, hyaline, 8 X 5-6 p.. 



Stilbum vulgare, Tode, Mecklenb., i. p. 10, t. 2, f. 16 ; Sacc., 

 Syll., iv. n. 2682. 



On rotten wood, oak cupules, &c. 



Stilbum pellucidum. Schrad. 



Scattered ; head white, from turbinate to subglobose ; 

 stem equal, rigid, hyaline. 



Stilbum pellucidum, Schrad., Journ., 1779, p. 65; Sacc., 

 Syll., iv. n. 2685. 



On rotten wood, decaying fungi, &c. 



Scarcely 2 mm. high. Allied to 8. vulgare. 



Stilbum acicula. Sacc. 



Mycelium obsolete ; stems scattered, scarcely 2 mm. high, 

 gregarious, white or pallid, splitting longitudinally; head 

 subglobose, white; conidia ellipsoid, minute. 



Stilbum acicula, Sacc., SylL, iv. n. 2691. 



Pachnocybe acicula, Berk., Engl. Flora, vol. v. p. 334. 



On herbaceous stems. 



