324 



THE LICHEN-FLORA 



Ireland :— Summit of Kylemore Mountains ! co. Galway. Mr. Larbalestier. 

 (1875). 



Spores .0155 — .0165 mm. long, .C07 mm. broad. 



217. L. impressula, Leight. albido-ciner ascent, thin, filmy, 

 rimulose, nigro-limitnte, (K yellow then red); apotJiecia black, 

 minute, punctiform, numerous, crowded into small groupes of 

 3 or 4 or more, impressed or sunken in the tliallns, each sunken 

 apothecium circumscissed so as to appear surrounded by a thin 

 thalline margin ; hypothecium thin, nigro-fuscous ; paraphyses 

 indistinct, apices colourless ; hymenium tinged with brown ; 

 spores 8, fuscous, rotundo-oblong, 1-septate, more or less constricted 

 in the middle. 



On bluish-grey slates, rare. 1876. 



Stn .: — Linnean Trans. 2d ser. vol. 1. p. 237. 



Fig : — Linn. Trans. L c. tab. 32. f. 1 and 2. 



Bot. Prov :— 6, 7. 



Wales : — Llanachar Bridge ! and Fort Hill ! near Fishguard, Pembrokeshire 

 (1876). Festiniog Road near Dolgelley ! near Tremadoc ! 



Gelatina hymenea I dirty-blue. Spores .014 — .0145 mm. long, .009 mm. 

 broad. Several plants grow on the same stone, and by the union of their dark 

 hypothallus map out the surface as in L. geographica. Allied to L. stellulata, 

 Tayl. but distinct by the thin filmy nigro-limitate thallus, larger spores, l-3rd 

 larger, and the singularly impressed apothecia. 



218. L. ryssolea, Leight. albido-cinerascent, thick, tartareous, 

 diffracto-areolate, areola plane or subplano-convex, irregularly 

 wrinkled, nigro-limitate, (K yellow then red) ; apothecia nigro- 

 fuscous, opake, rusty, large, prominent, and sessile, numerous, 

 margin thick, paler, entire or flf cuose ; hypothecium very thick, 

 fusco-nigrieant ; hymenium thin, brownish, paraphyses indistinct, 

 apices thickened, nigro-fuscous ; spores 8, fuscous, oblong, 1-septate, 

 small. 



On Cambrian rocks, rare. 1876. 



Stn : — Linnean Trans. 2nd ser. vol. 1. p. 237. 

 Fig : — Linn. Trans. 1. c, t. 32. f. 5 and 6. 

 Bot. Prov :— 6. 



Walks :— Fort Hill ! near Fishguard, Pembrokeshire (Sept. 1876.) 

 Spores .016 — .017 mm. long, .007 — .008 mm. broad. Gelatina hymenea I 

 pale-dirty-blue. Medulla I — . 



** Hypothecium colourless. 



219. L. atroalbella, Nyl. griseo-palleseent or fusco-griseous or 

 cinereo-fuscescent, areolato-rimoso-diffract, areolae small, plane, 

 smooth, (K yellow then red) ; hypothallus nigro-fuscous ; apothecia 

 innate in the areolae, plane, margined ; hypothecium colourless ; 

 spores 8, fuscous, ellipsoid, 1-septate. 



On quartzose and schistose rocks, frequent. 



Svn :— Nyl. Obs. Holm. 2. 11. (1853.) Mudd Man. 214. 



Fig :— Hepp Sporen t. 5. f. 31. t. 61. f. 529. 



Exs : —Hepp 31. 529. Mudd. 185. Leight. 184. 



Geog. Distrib : — Germany, Pyrenees, Sweden. 



Bot. Prov— 5.. .10.. .19. 



England : — Near Easby ! Battersea Bank ! Lanbraugh Bigg ! Cleveland. 

 Mr. Mudd. Haughmond Hill ! Lyth Hill ! Bodbury King ! near Church Stret- 

 ton, Shropshire. 



Ireland : — Kilcurry ! near Cork. Mr. Carroll. 



