108 FUNGUS-FLORA. 



leaves, twig-s, Sec, or passing; into cristate ascending 'branches 

 -^—1 in. higii. Kot byssoid and silky when young, 



Soppittiella Crustacea. Mass. 

 Umber-brown with sometimes a purple tinge, broadly 

 incrusting, rather fleshy, margin fibrillose, whitish; hy- 

 nienium irregularly papillose ; spores globose, rough, vinous- 

 brown, 9-11 IX. 



Thelcpliora Crustacea, Fr., Hym. Eur. G37; Stev., Brit. 

 Funo-, 206. 



Eunuing over the ground, moss, &c. Distinguished by 

 the brown colour and white fibrillose mai-gin ; sometimes 

 effused in an irregular manner for several inches. 



EXOBASIDIUM. Woronin. (fig. 22, p. 97.) 



Parasitic on living plants, leaves more especially, which 

 in consequence become vaiiously deformed ; basidia crowded, 

 cylindric-clavate, tetrasporous; spores elliptic-oblong, often 

 unequilateral, continuous, colourless. 



Exohasidium, Woronin, in Verhandl. Nat. Ges. Freib. iv. 

 fasc. iv. (1867); Sacc, Syll. vi. p. 664. 



A very peculiar and anomalous genus, the vegetative 

 hyphae remain immersed in the root, the basidia, which are 

 closely packed and form a hymenium, being alone developed 

 on the surface. Most nearly allied to Cor«ic7MH?, but distin- 

 guished by being a true parasite. 



Exobasidium vaccinii. Woronin. (fig. 22, p. 97.) 

 Innate, effused, form various, usually orbicular or elon- 

 gated, fleshj^ often becoming confluent; hymenium protruding 

 from the under surface of the leaves or the stem, flesh- 

 coloured with a white bloom ; spores elongato-fusoid, colour- 

 less, straight, 5-8 x 1-2 fx. 



Exohasidium vaccinii, Woronin, in Nat. Ges. Z. Freib., 

 b. iv. Heft iv. ; Sacc, Syll. vi. n. 7795, 



Oi> living leaves, rarely on stems and petioles of Vaccinium 

 myrtiUus. lied or pur})le patches occur on the upper surface 

 of the leaves opposite to the portion occupied by the fungus 

 below. The fungus occurs on other species of Vaccinium, also 

 ■ on species of Andromeda and Acrosta^ihjlos in various parts of 

 Europe. 



