biatorina] lecideaceje 12& 



An interesting plant hitherto rightly defined only by Nylander 

 (Flora xvii. p. 308 (1874) as Lecanora clceiza). In the original 

 specimen the thallns is in small, rotundate, detached patches, limited 

 by a paler fibrillose hypothallus ; but in a subsequent specimen from 

 Sir Thomas Gage, the thallus is much better developed and more 

 contiguous, with the hypothallus less visible. The apothecia are 

 chiefly central and not numerous. The spermogones, sparingl}^ 

 visible, have the spermatia {fide Nyl. I. c.) minute, oblong, 0,0025 mm. 

 long, 0,0010 mm. thick, on septate somewhat turgid sterigmata. 



Hab. On a rock in an upland tract of a mountainous region. — 

 Dish'. Found only very sparingly in S.W. Ireland (recently also in 

 Hungary). — B. M. Killarney, Kerry. 



32. B. columnatula A. L. Sm. — Thallus indeterminate, 

 sordid-yellow, composed as it were of small erect connate 

 columns and divided into areolae (K + yellow). Apothecia 

 superficial, black, small, somewhat plane and obtusely margined, 

 becoming immarginate, whitish or yellowish within ; paraphyses 

 not well discrete ; epithecium and perithecium blackish ; spores 

 oblong, 0,012-16 mm. long, 0,004 mm. thick ; hymenial gelatine 

 bluish then tawny-wine-red with iodine. — Lecidea columnatula 

 Nyl. in Flora Ix. p. 228 (1877); Cromb. in Grevillea vi. p. 19 ; 

 Leight, Lich. Fl. ed. 3, p. 332. Specimen not seen. 



Well characterized by the columnar thallus. The spermogones 

 have branched sterigmata and minute spermatia, 0,0035 mm. long, 

 0,0006 mm. thick. 



Hab. On a schistose rock in a maritime district. Collected by 

 Larbalestier at Kylemore, Connemara, Galway. 



33. B. biformigera A. L. Sm. — Thalius dirty-greenish-white, 

 tartareous, thick, tumid, warted-areolate, variously cracked (K-f- 

 yellow, CaCl -f- yellow). Apothecia black or bluish-black, small 

 and conglomerate, plane and slightly margined, or large, sessile 

 with a thickish flexuose margin ; hypothecium colourless, the 

 hymenium pale-bluish upwards ; paraphyses distinct, blackish 

 at the tips ; spores narrowly oblong, 1 -septate, the cells bi- 

 guttulate, 0,014-15 ram. long, 0,004-5 mm. thick; hymenial 

 gelatine blue with iodine. — Lecidea biformigera Leight. in Ann. 

 Mag. Nat. Hist. ser. 3, xix. p. 403 (1867) & Lich. Fl. p. 321 ; 

 ed. 3, p. 332 ; Cromb. Lich. Brit. p. 90. 



Exsicc. Larb. Lich. Hb. n. 105 ; Johns, n. 392. 



Form subbiformata (Nyl. ex Leight. Lich. Fl. ed. 3, p. 333 (1879)) 

 differs from the type in the plane areolae of the thallus. 



Hab. On maritime and alpine rocks. — Distr. Somewhat rare in 

 the Channel Islands, central and N. England and W. Ireland, more 

 frequently found in Wales, not yet recorded from Scotland. — B. M. 

 Alderney ; Longmynd, Shropshire ; Tenby, Pembrokeshire ; Llyn 

 Aran, Dolgelly and Cader Idris, Merioneth ; Llandbedrog and 

 Snowdon, Carnarvonshire ; Whitehaven, Cumberland ; Doughruagh 

 Mt. and Lough Feagh, Connemara, Galway. 



II. K 



