HEW on XOTEWOETHY FUXGI 143 



])]ioris brevioribus, ca. 5 X 1 yu-, e strato crasso atro-oHvaceo oriundis 

 suffultis. 



Hah. in fobis cmortuis Osmanthl aqiiifolii var. ilicifolia, West 

 Kilbride, Ayrsbire (Boyd), Sept, 



Belongs to Diedicke's § 1), as do L. medium and L. acerimun. 

 Tlie mycelium, after destroying tbe epidermal cells, penetrates deeply 

 into tbe underlying tissue; tbe pycnidial wall above is tbick and 

 formed of a dark mass of brown isb-black bj-plue, wbicb at maturity 

 is covered only by tbe cuticle. 



356. LeptotkvhtUiM Phormti Grove in Kew Bull. 1921, p. 148, 

 f. 7. 



Coniofht/rium Pho7-mium Cooke in Grrevill. 1879, vii. 96. JPlioma 

 Phormii Sacc. Syll. iii. 166. 



Pycnidia densely aggregated, 200-300 // diam., black, lens-sbaped, 

 subcuticular, raising tbe cuticle in a little ridge wbicb at lengtb splits 

 away in various forms, moutbless, but tbe upper part at lengtb dis- 

 a])pearing. Spores very numerous, embedded in mucus, smgly 

 colourless, bardly coloured in mass, ovoid in face- view, oblong in 

 ])rolile, often more or less flattened, faintly guttulate, 3-4 X 1-2 /x ; 

 no visible sporopbores. 



On decaying leaves of Pliormium tenax. Hunterston, Ayrsbire, 

 and Stranraer, Wigtonsbire (Boyd). Aug.-Nov. 



Tbe original specimens described by Cooke were said to bave 

 occurred, on dead leaves of tbe same bost, in tbe Botanic Gardens at 

 Brussels. Probably tbe fungus accompanies tbe bost wberever it is 

 cultivated, just as Goniotliyrium concentricum accompanies tbe 

 species of Yucca, The structure and growth of the pycnidium is 

 fully explained in the Kew Bulletin {I. c.) ; it belongs to Die- 

 dicke's § D. 



Pycnothtrium Died, in AnnaL Mycol. 1913, xi. 175. 

 Pycnidium shield-shaped, of radiating texture, opening by a 

 pore. Hjnnenium inverted, spores borne on tbe under side of tbe 

 shield, continuous, free (not in chains), seated on a hyaline stratum 

 of swollen sporopbores. A genus of the LejDtostromacese. 



357. Pycn^othyrium gentianicoltjm, comb. nov. Leptothy- 

 rium f/entianicolum Bauml. Mj^c. Not. p. 1. Sacc. Syll. x. 415. 

 AUesch. vii. 333. Cf. Depazea gentianlcola Fr. Syst. Myc. ii. 531. 

 Sacc. Syll. iii. 62. 



Spots roundish or irregular, grey, then brown. Pycnidia amphi- 

 genous, round, flat, 60-100 /x diam., subcuticular, then erumpent, 

 shining black, minutely parenchymatous. Sj)ores linear, elongate, 

 rounded at both ends, straight or curvulous, 14-16 X 3 yu- (12-15 X 

 2|-3 /x.) ; sporopbores short, papilliform, hanging downwards. 



On dying leaves of Gentiana acaulis. Saltcoats, Ayrshire (Boyd). 



The description given by Fries of his Depazea does not seem to 

 agree entirely with the Pycnothyrium. LeptotJiyrium litigiosum 

 Sacc. {Leptosfroma litigiosum Cooke, Handb. p. 417) is another 

 British Py cnotli yrium^=. P . litigiosum Died. 



358. Leptostromella pteridina Sacc. & Koum. Syll. iii. 660. 

 Trans. Brit. Mvc. Soc. vi. 51. L. aquilina Massal. (an immature 

 form). Sacc. Syll. x. 431. Allesch. vii. 391. 



