STILBUM. 443 



Fam. III. STILBEAE. 



Series I. Hyalostilbeae. Sacc. 



Sect. 1. Amerosjooreae. Sacc. 



STILBUM. Tode. (figs. 20-22, p. 442.) 



Stroma subterete, nsuall}' elongated and stem-like, com- 

 posed of agglutinated liyphae that become free above and 

 form a more or less swollen head ; conidia minute, con- 

 tinnous, borne on the tips of the hyphae forming the head, 

 at first involved in mucus. 



Stilhum, Tode, Fung. Mechl., i. p. 10; emended by Sac- 

 cardo in Mich., ii. p. 32 ; Sacc, Syll., iv. p. 564:. 



The distinct, simple or branched stem bearing a single 

 head, and. the conidia involved in mucus characterise the 

 genus. Small fungi, rarely exceeding ^ of an inch in 

 height. 



Stilbum orbiculare. B. & Br. 



Forming white patches an inch or more in diameter, 

 springing from a white, thin, pulverulent stratum, stem 

 cylindrical, tomentose, often with a torn frill-like structure 

 at the apex ; head globose ; conidia cylindrical, 5 X 2 /x,. 



Stilbum orbiculare, B. & Br., Ann. Sci. Kat., n. 1714 ; Sacc, 

 Syll., iv. n. 2676. 



On Lindbladia effusa. 



fungus; — Fig. 10, Epicocciim pwyurascens, section of; — Fig. 11, coni- 

 dium of same; — Fig. 12, Endodesmia gJauca; — Fig. 13, Bactridium 

 helvellae, spore of,-— Fig. 14, Fusarium solani ; — Fig. 15, Grainliium 

 sulndatum ; — Fig. 16, Isaria citrina, and portion of a branch showing 

 origin of conidia; — Fig. 17, Periola tomentosa : — Fig. 18, Hymenula 

 rubella; — Fig. 19, Sporocyhe hyssoides ; — Fig. 20, Stilbum citrinellum ; — 

 Fig. 21, section of head ot same, showing it to consist of hyphae spreading 

 from the stem ; — Fig. 22, hyphae bearing conidia, from head of same ; — 

 Fig. 23, Ceratium hydnoides; — Fig. 24, Tuhercidaria euonymi ; section of 

 fungus and curved condiophore ;— Fig. 25, Cylhidrocolhi urticae: — 

 Fig. 26, lllosporhim rosenm ; — Fig. 27, Fusarium betae ; — Fig. 28, Spha- 

 celia segetum ; — Fig. 29, Helicosporium ramosum. (All the figures are 

 highly magnified.) 



