. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. 340 IICHENACEI. [P ANNUL ARIA. 57. PANNULARIA Nyl. Flora, 1879, p. 360, I. c. 1882, p. 458. '—Thallus squamulose or granulose. Apothecia biatorine, rarely lecideine _: spores Snee, ellipsoid or oblong, simple or variously sep- tate, colourless; hymenialgelatine variously tinged with iodine. Spermogones with spermatia as in the preceding genus, but sometimes shorter. Diftera from Pannaria in the less developed thallus and the different type of the apothecia, t
. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. 340 IICHENACEI. [P ANNUL ARIA. 57. PANNULARIA Nyl. Flora, 1879, p. 360, I. c. 1882, p. 458. '—Thallus squamulose or granulose. Apothecia biatorine, rarely lecideine _: spores Snee, ellipsoid or oblong, simple or variously sep- tate, colourless; hymenialgelatine variously tinged with iodine. Spermogones with spermatia as in the preceding genus, but sometimes shorter. Diftera from Pannaria in the less developed thallus and the different type of the apothecia, though occasionally these have a leeanoroid appearance. In some respects it might not inappropriately be re- ferred to the subtribe of the Lecideei, but its true affinities are rather with Pannaria. Fig. Pannularia nigra Njl.—a. Vertical Beofcion of a young apotheeium, X30. 6, A theca and paraphyais, X350. c. Spores, x500. d. Tri- septate spores of P. psotina Nyl., X500. 1. P. lepidiota Nyl. ex Stiz. St. Gall. Nat. Ges. 1882, p. 336. —Thallus microlepideo-squa- mulose, lurid, lurid-brown or cervine; squamules moderate, imbricato-congested, firm, crenu- late, often ascending at the margin, whitish beneath, more congested, smaller and granulato-crenulate in the centre. Apothecia biatorine, nearly moderate, plane or convex, dark-red or brown, internally pale- whitish ; spores ellipsoid, simple, 0,015-23 mm. long, 0,008-12 mm. thick; hymenial gelatine at first faintly bluish, then wine-red with iodine.—Cromb. Grevillea, xviii. p. 43.—Leeidea carnosa /3. lepidiota Somm. Suppl. n. Lapp. (1826) p. 174. Lichenoides granosum suhglaucum, tuherculis planis nigricantibus Dill. Muse. 544, t. 82. f. 2. Looks as if intermediate between Pannaria ruiiginosa var. /3 and the following species, but is separated from the former by the biatorine apo- thecia, and from the latter by the more developed thallus and the larger spores. The thallus in its more typical state is pulvinato-acerv
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectlichens, bookyear1894
