348 FUNGI. [Oldium. 



131. Trichothecium. Lk. Trichothecium. 



Sporidia uniseptate, oval, scattered on the Jtocci. — Name, 

 ^^/g, a hair^ and ^?j%?j, a vessel, 



1. T. fuscum, Fr. (brown Trichotheciurn) ; flocci ascending 

 brown, sporidia oblong subdidymous. Fr, Syst, Myc, v. 3. p. 

 426. — Macrosporium heterosporium^ Grev. Ed, Phil. Journ, 

 i^fide Fr,). 



On dead capsules of Gentiana campestris, Dr. Greville. — Tufts 

 thin, indeterminate. Flocci branched, flexuous, intricate; branches 

 divergent, obtuse. Sporidia few, 1 — 2-septate, intermixed with some 

 which are more minute. I suppose there must be some error in the 

 citation of Fries, as I have in vain looked over all the volumes of the 

 Edinburgh Phil. Journ., and can find no notice of the plant. I have 

 therefore copied the information given by Fries.* 



2. T.roseunii \Jk. (rose-coloured Trichothecium); flocci branched 

 csespitoso-intricate covering the rose-coloured oblong uniseptate 

 sporidia. Grev. Fl, Ed, p. 465. Sc, Crypt, Fl, U 172. Fr, 

 Syst. Myc. v. 3. p. 427. 



On sticks, herbaceous plants, &c. Not uncommon. 



134. OiDiUM. Lh. Oidium. 



Sporidia simple, more or less oval, arising from the terminal 

 moniliform joints of the flocci. — Name, wov, an egg^ and iihc^ 

 resemblajice. 



1. O. dureum, Lk. (^golden Oidiu?n) ; tufts dense at first 

 villous white at length golden-yellow, fertile flocci breaking up 

 into oval joints. Lk. Sp. 1. p. 121. Nees, Syst. f, 44. Fr. 

 Syst. Myc. V. 3. p. 430. — Torula aurea, Corda, I. c. t. S. f. 

 56. — Mucor querneus, Sow.! t. 378./. 12. 



On rotten wood. In the hollow of the Fairlop oak. Sowerby It 



should seem, if the figures are to be trusted, that this plant varies much 

 in colour. Sowerby's plant agrees exactly in this respect with Nees' 

 figure, being of the beautiful orange-ochre sold under the name of 

 golden chrome. Viewed with a good lens, it has somewhat of the 

 botryoid appearance figured by Sowerby, but on analysis it is most 

 clearly a true Oidium. 



2. O.fulviwi, Lk. (taivny Oidiuni) ; tufts dense at first white 

 and villous at length tawny, fertile flocci breaking up into 

 oblong-lanceolate joints. Lk. Sp. 1. p. 121. F'r. Syst. Myc. 

 V. 3. p. 430.— Torula fulva, Corda, I. c. t. 37. 



On very rotten wood. King's Cliffe, Norths. Rev. M. J. Berkeley. 

 — Joints oblongo-lanceolate, the lanceolate form arising from a little 

 truncate subcylindric apiculus. 



* The precise place quoted by Sprengel is " Grev. Edinb. Philos. Journ, 3. 

 p. 64. t. 1." 



