. Genera lichenum [microform] : an arrangement of the North American lichens. Lichens; Lichens. (228). and of a niotallic lustre, then a narrow white line, encompassing a brown- ish less solid ;' The description is from ^S'. (jlobifcnis, but applies as well CO and S. cotuprcssus, and is the typical structure cf the genus. IMontagno (llcclicrch., siir la struct, du nud. dcs Hphrroph., dc, in^lwn. 2, 15, p. 14(5, t. I'l, f. 1) has quite omitted to notice the 'brown core'; whidi niiglit well liavo (inalided his explanation of iho shape of the outer layer of the 'nucleus' by &
. Genera lichenum [microform] : an arrangement of the North American lichens. Lichens; Lichens. (228). and of a niotallic lustre, then a narrow white line, encompassing a brown- ish less solid ;' The description is from ^S'. (jlobifcnis, but applies as well CO and S. cotuprcssus, and is the typical structure cf the genus. IMontagno (llcclicrch., siir la struct, du nud. dcs Hphrroph., dc, in^lwn. 2, 15, p. 14(5, t. I'l, f. 1) has quite omitted to notice the 'brown core'; whidi niiglit well liavo (inalided his explanation of iho shape of the outer layer of the 'nucleus' by "^wwc saillie hcmisphiriqtie dc la couchc wcdnllaire on ccntralo du ttiallc, rcprcscntant imc sortc dc torus.^' For, passing the question of origin, this globular, brown core is at least a part of the apothecium, and in fact the base of it; and may thereibre prove properly comparable, as, if I do not greatly mistake, it is compar- able, witli the hypothecium of the Cidicici. Wo And in Acolium, which, as here taken, includes all the highest Calicieino types, and bridges in fact the at first startling interval between at length athalline Cidicium and fruticuloso Acrosciiphis, no little diversity in the proportions as well as in the difVereutiation of the envelopes and internal parts of the fruit. Even the proper oxciplo is in this way reduced, in those species in which the apothecium is directly conditioned by the thallus, and becomes (in A. tifjillarc, A. occJlatum. Koorb., A. Californicitm, dec.) a thin, and finally disai)pcaring lino ; while its similarly varying hypothecium is sometimes peculiarly incrassatcd. In an apothecium of the Californian A. Bolandcri now before me, the hypothecium, instead of exhibiting, as commonly, a more or less lunate outline, is hemispherical, and, being bordered by the narrow lino of the white layer, and conditioning similarly to Spharoplio- rus the shape of the spore-mass, fairly counterfeits, if it docs not also explain, the peculiarities
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectlichens, bookyear1872
