444 PUNGUS-FLOKA. 



Stilbum tomentosum. Schr. 



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

 tose; head subrotund becoming opaque; conidia globose, 

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

 creeping mycelium. 



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

 Sacc, Syll., iv. n. 2677. 



Very minute. Parasitic on various species of Myxogastres, 

 as Trichia, Bidymium, Arcyria, &c. 



Stilbum erythroeephalum. Ditm. 



Gregarious or scattered, stem rather thick, tomentose, 

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

 head ; conidia elliptical, 4^6 X 2-2 • 3 jjl, hyaline, borne on 

 slender, septate, colourless conidiophores that are nodulose 

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



Stilbum erythroeephalum, 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 /i. 



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

 Syll;, iv. n. 2682. 



On rotten wood, oak cupulos, &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. II. 2686. 



On rotten wood, decaying fungi, &c. 



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



Stilbum acicula. Sacc. 



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

 gregarious, white or pallid, splitting longitudinally; head 

 subglobose, while ; conidia ellipsoid, minute. 



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



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



On herbaceous stems. 



