POROTHELIUM. 



231 



first distinct (and closed), soon opened in the form of pores, at Porothe- 

 length elongated and tubular. A genus very distinct from the llum> 

 preceding ones, in many respects anal- 

 ogous 'with Fistulina. Fr. Hym. 

 Eur. p. 595. 



1. P. Friesii Mont. White, some- 

 what tan-colour, effused, confluent, 

 flocculoso - membranaceous, circum- 

 ference simple. Warts containing 

 the pores immersed, yellowish, at 

 length opening in pitcher-shape. 



On dead pine. Rare. Nov.-Feb. 



Name after Elias Fries. Montagn. 

 Ann. Sc. Nat. 1836, Jun. n. 39. Fr. 

 Hym. Eur. p. 595. Berk. Out. p. 257. 

 C. Hbk. n. 840. S. Mycol. Scot. n. 793. 



2. P. Stevensoni B. Br. Sub- LXXI. Porothelium Stevensoni. 



stance rather thick, gelatinous, mar- Natur ^ size. Section five times 



. i i i i i natural size. 



gm rather coarsely hispid, at length 



more or less denuded. Warts of the hymenium distinct, inter- 

 stices very smooth, bearing at the apex a limpid, diaphanous, 

 yellow globule. 



On old pine rail. Glamis, 1877-1886. Spring, autumn. 



Almost white when fresh, becoming yellowish when old. The limpid 

 globule is at first pale. When full grown the papilla is from four to five times 

 as long as the diameter of the globule. The mycelium imparts a sweet scent 

 to the wood. Found in greatest perfection on the under side of very old pine 

 rail lying on the ground. Name after Rev. John Stevenson. B. &> Br. n. 

 1683. S. Mycol. Scot. n. 794. 



3. P. Keithii B. Br. Narrowly adnate, slightly umber- 

 colour; circumference very thin, at first somewhat gelatinous. 

 Warts short, at length collapsed, gelatinous in the centre. 



On dead fir. Sanquhar. Dunphail. Glamis. April. 

 Name after Rev. Dr Keith. B. & Br. n. 1684. S. Mycol. Scot. n. 795. 



4. P. confusum B. Br. Narrowly adnate, pallid, margin 

 very thin, arachnoid, substance at first floccoso-pulverulent. 

 Warts very small. 



On fir sticks. Glentanner. Leighwood. Glamis. Pitoulish, 

 Inverness-shire. June-Sept. 



Name confundo, to confuse. From having been confounded with a species 

 in another genus. B. & Br. n. 1685. S. Mycol. Scot. n. 796. 



