BACIDIAJ LECIDEACEiE 151 



Yorkshire, fide Mudd). — B. M. Chelsfield, Kent ; near Hastings, 

 Sussex ; near Ring wood, Hants ; Oldbury and near Alfrick, Wor- 

 cestershire. 



4. B. luteola Mudd Man. p. 183, t. 3, f. 68 (1861) pro 

 parte. — Thallus effuse, thin, leprose-granulose, greyish or greyish- 

 green (Kf + yellowish, CaCl — ), at times nearly obsolete. 

 Apothecia moderate, sessile, naked, at first concave, becoming 

 plane nnd obtusely margined, at length convex or subglobose, 

 the margin excluded, yellow-reddish or reddish-flesh-coloured ; 

 hypothecium pale-yellowish ; paraphyses slender, loosely coherent ; 

 epithecium not distinct ; spores acicular, pluri-septate (the septa 

 at length 16), 0,045-90 mm. long, 0,003-45 mm. thick; hymenial 

 gelatine bluish then dark-wine-red or violet with iodine. — B. 

 rubella Massal. Ric. Lich. p. 118 (1852) ; Mudd Man. p. 182, t. 3, 

 f. 68. Lichen lutereus Gmelin Syst. Nat. ii. p. 1359 (1791)? 

 L. luteolus Schrad. Spicil. Fl. Germ. p. 85 (1794). L. vernalis 

 With. Arr. ed. 3, iv. p. 14 (1796) (non L., non Hoffm.) ; Engl. Bot. 

 t. 845. Verrucaria rubella Hoffm. Deutschl. Fl. ii. p. 174 (1795). 

 Lecidea luteola Ach. Meth. p. 60 (1803) (excl. vars.) ; S. F. Gray 

 Nat. Arr. i. p. 472; Tayl. in Mackay Fl. Hib. ii. p. 126; 

 Cromb. Lich. Brit. p. 73. L. vernalis Ach. Meth. p. 68 (1803) ; 

 S. F. Gray Z. c. p. 470; Hook, in Sm. Eng. Fl. v. p. 183 pro 

 parte. L. rubella Schser. Spicil. p. 168 (1836); Leight. Lich. Fl. 

 p. 341 ; ed. 3, p. 369 (excl. syn. Lichen porriginosus) ; Cromb. in 

 Grevillea xxii, p. 58. 



Exsicc. Bohl. n. 91 ; Leight. n. 92; Cromb. n. 86; Larb. 

 Lich. Hb. n. 184. 



Lichen lutereus Gmelin is quoted by Acharius (Prod. Lich. Suec. 

 p. 42 (1798) ) as a synonym, but this identification is uncertain. The 

 species-name vernalis, based on Lichen vernalis Lightf. (Fl. Scot. ii. 

 p. 805 (1777) ) has been adopted by some authors ; but Lightfoot's 

 plant is identical, in part at least, with Lecanora ferruginea (Pt. i. 

 p. 376). Lichen rubellus Ehrh. does not rank, being only a herbarium 

 name. The apothecia are usually abundant and scattered, but some- 

 times there are several aggregate with the margin irregular and 

 sublobate. 



Hab. On trunks of trees, chiefly elms, in wooded maritime and 

 upland situations. — Distr. General and common in most parts of 

 England, rare in Wales, Scotland, Ireland, and the Channel Islands. 

 — B. M. Patrimoine, Jersey ; Guernsey ; Ulting, Broomfield, Gosfield 

 Hall, Quendon and Epping Forest, Essex ; Chilstone Park, Kent ; 

 Middleton, Lavington Park, Chanctonbury and Glynde, Sussex ; 

 Lyndhurst, New Forest, Hants ; Ilsham, Torquay, Devon ; Kynance, 

 Coverack, near the Lizard, St. Judy and near Penzance, Corn- 

 wall ; Bathampton Downs, Somerset ; near Bourton - on - Water, 

 Cirencester, Clifton and Chesterton, Gloucestershire ; near Cambridge ; 

 near Yarmouth, Norfolk ; Gopsall, Leicestershire ; Broadwas and 

 near North Malvern, Worcestershire ; Aberdovey, Merioneth ; Oswes- 

 try and Skelton Eough, near Shrewsbury, Shropshire ; Kildale and 

 Newton Wood, Cleveland, Yorkshire ; Teesdale, Durham ; Airds, 

 Appin, Argyll ; Craiglockart, near Edinburgh ; Aberfeldy, Perthshire ; 



