. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. 264 LICHENACEI. Tribe XIV. STICTEI Nyl. Syn. i. (1860) p. 332, ut subtribus Parmelieorum; Bull. Soc. Linn. Nonnand. ser. 2, ii. (1867) p. 498. Thallus fi'ondosely dilated, lobate or lobato-laciniate, loosely affixed to the substratum ; the under surface usually with tomentose rhizinsB, and also pulverulent or sorediiform cyphellaa (pseudo- cyphellse), or true uroeolate or thelotremoid cyphellse; gonidial layer consisting either of gonimic granules or of true
. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. 264 LICHENACEI. Tribe XIV. STICTEI Nyl. Syn. i. (1860) p. 332, ut subtribus Parmelieorum; Bull. Soc. Linn. Nonnand. ser. 2, ii. (1867) p. 498. Thallus fi'ondosely dilated, lobate or lobato-laciniate, loosely affixed to the substratum ; the under surface usually with tomentose rhizinsB, and also pulverulent or sorediiform cyphellaa (pseudo- cyphellse), or true uroeolate or thelotremoid cyphellse; gonidial layer consisting either of gonimic granules or of true gonidia. Apothecia lecanoroid or parmeleine; spores Snse, fusiform, usually 1- or 3-septate, generally colourless or sometimes pale-brownish; paraphyses discrete, usually more or less articulate, moderate, or thickish; hymenial gelatine (especially the apices of the theose) blue with iodine. Spermogones with jointed sterigmata. The plants of this tribe are for the most part the largest and best developed of all lichens. With these " patricians of lichens," as they were termed by Drs. Taylor and Hooker (Hook. Journ. Bot. 1844, p. 635), the ascending series in Nylander's classification culminates. The thallus, which in its earlier stages of growth is orbicular, is usually widely expanded, of a coriaceo-membranaceous texture, and frequently, when wet, emits an odour as of hemp. In a few species peculiar cephalodia occur either on the upper surface, on the margins, or on the lower surface of the thallus {tiide Nyl. Syn. /. c. p. 333). The great majority of species are found in warm climates or in the Southern hemisphere; most of the European. Fig. 46. Loharia pulmenaria Hoffm.—a. Vertical section of thallus, x200. i. Gonidia, X350. c. Vertical section of a small apothecium, x30. d. A theca and paraphysis, X 350. e. Thi-ee spoi-es, X 500. /. Vertical section of a spernio- gone, x30. g. Jointed sterigmata and spermatia, Please note that these images are extracted f
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectlichens, bookyear1894
