Helicosporium.] FUNGI. 335 



5. P. dlbiday Berk, (white clavate Pachnocyhe) ; gregarious 

 pure white clavate, sporidia large oval (oval-oblong, Fr^, — 

 Sporocyhe albida, Fr. Sijst. Mijc. v. S. p. 14. 



On rotten wood, in company w'wh^StacJnjUdiwn hicolor. King's 

 ClifFe, Norths. Rev. 31. J. Berkeley. — Not a line high. Gregarious, 

 but rather scattered, white ; stem marked with cells like the leaves of 

 an Hypnum, filiform at the base, confluent with the strongly clavate 

 apex, which is sometimes forked. Sporidia scattered on the receptacle, 

 large, oval, beautiful, transparent. This beautiful plant differs in one 

 point only from Sporocybe alhida, Fr., viz., that the sporidia are oval, 

 and not oval-oblong ; but when it is considered how frequently in the 

 lower fungi the sporidia acquire a longer major axis, this can be scarcely a 

 sufficient reason for considering my plant as altogether new. It is 

 placed doubtfully by Fries in Sporocybc, with the species of which it 

 does not agree in habit, but it seems to come not unnaturally into the 

 present genus, there being a tendency in the preceding species, which is 

 \vhite, to acquire a darker tinge on the stem. I do not see in what 

 other tribe of Hyphomycetes it can be placed, and perhaps this is one 

 of the cases in which the exception confirms the rule. 



116. Myxotrichum. liimze. JVIyxotridium. 



Sporidia simple, conglomerate, at first glued together by a 

 viscid substance. Flocci solid, opaque. — Name, p^-j^a, gluten^ 

 and ^f/J, a Jiaii\ 



1. M. ccesium, Fr. {grey 3Iyxotric1nim) ; fibres tufted intri- 

 cate blueish-grey nodose at the points from which spring the 

 branches and branchlets, sporidia conglobated globose pellucid. 

 Fr. Syst. 3Iyc. v. 3. p. 348. — Gonytrichum ca'siu?n, Nces, jSov. 

 Act. Nat. Cur. I. c. p. 2U.f. 14. 



On rotten branches. Apethorpe, &c., Norths. Ecu. 31. J. Berkeley. 

 — Forming dense greyish tufts, at length black, consisting of very much 

 branched fibres ; branches [)atent, nodose at their origin and there fur- 

 nished with numerous globose 5;>onV//<7, I find a form, which I cannot 

 separate, very much resembling 3f. murinurn, as figured by Ditmar. 



117. Helicosporium. Necs. Helicosporium. 



Sporidia flocciform, spirally involute, septate, at length 

 breaking at the articulations — Name, =/./Ja, a spirCy and o-to^o;, 

 seed. 



1. II. puhuidtum, Fr. (minidc Helicosporium) ; fibres cirspi- 

 toso-pulvinate very slender branched septate at their apices, 

 sporidia yellow-green. Fr. Syst. 3Iyc. v. 3. ;;. 354. — I/elicotri- 

 chwn piilvinatum, Necs, L c. f. 15. — b. rff'usum ; effused very 

 thin, sporidia whitish. 



b. On wood. Stibbingfon, Hiuits. Brr. 3f. J. 7?/;7f<7<//.— Forming 

 a very thin black stratum, following llic inequalities of the wood ; ffocci 

 branched, brandies patent, articulated ; articidatioiis about as long as 

 broad ; npirra pointed, pelhuiil, terminated by the minute closely invo- 

 lute extremely fugacious sporidia, which consist of about three volu- 

 tions and as many articulations, extremely fiigacious ; volutions at first 



