598 



MUCEDIXES. 



Brownish circular spots on the leaves indicate the presence of this monld, 

 which is so minute that it might otherwise be overlooked. Spores with a 

 slight swelling towards the base ('001 in.) '025 m.ra. long, often set on 

 obliquely ; sometimes they give oT below a second spore, and very occa- 

 sionally there is a septum in the threads. 



Gen. 231. ACROSPEIRA, B. & Br. 



Hyphasma decumbent ; fertile flocci 

 erect, branclied above, apex of the 

 ramuli somewhat quadri-articulatey 

 spirally conyolute ; spores subglobose, 

 granulated, springing from one or other 

 of the articulations. — B. ^- Br. Ann. N. 

 iy. 710. 952. (Fig. 266.) 



1792. Acrospeira mirabilis. i?. 4" ^n 



" Curious Acrospeira." 



Fertile flocci branched ; branches 

 convolute at their apices, four ter- 

 minal joints swollen; spores ?;ubglobose, 

 springing from the second joint. — 

 Berh. Litr. p. 305, /. 69a. Ann. N.H. 

 no. 952. 

 On sweet chestnuts. Bristol. 



A most curious fungus, in which the dark granulated spores are formed 

 by a transformation of the second joint from the top of the branchlets. All 

 the four terminal joints swell, but the second only in general proves fertile, 

 though in a few instances the terminal joint also is transformed. -M.J.B. 

 ^ (Fig. 26a) 



Gen. 232. VERTICILLIUWI, Link. 



Flocci septate, hyaline or coloured ; 

 branches verticillate ; spores apical. — 

 Berk. Outl. jj. 349. {Fig. 267.) 



1793. Verticillium apicale. B. ^ Br. 



" Short-branched Verticillium." 



Effused, olivaceous-black ; flocci 

 straight, ramuli apical, very short, 

 incrassated at the base; spores glo- 

 bose. — Ann. N.H. no. 531, 1. 1 ,f. 17. 



On decorticated oak branches. Feb. 

 Wraxall, Somerset. 



rig. 267. 



