. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. SPHKfCTRINA.] CAtlCIEI. 83 brownish or blackish, paraphyses usually little developed; hy menial gelatine scanty. Spsrmogoaes punetiform, black, the sterigmata somewhat simple. This tribe consists of rather small plants, som? of which are paragitio and readily overlooked, while others are conspicuous from their brightly coloured thalli. The ap^thecia sometimes have the stipes abnormally branched, and occasionally the capitulum ia proliferous. 20. SPHINCTRINA F
. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. SPHKfCTRINA.] CAtlCIEI. 83 brownish or blackish, paraphyses usually little developed; hy menial gelatine scanty. Spsrmogoaes punetiform, black, the sterigmata somewhat simple. This tribe consists of rather small plants, som? of which are paragitio and readily overlooked, while others are conspicuous from their brightly coloured thalli. The ap^thecia sometimes have the stipes abnormally branched, and occasionally the capitulum ia proliferous. 20. SPHINCTRINA Fr. PL gorwm) ; De Wot. Giorn. Bot. It. 1846, p. 314.—Thallns none proper. Apothecia parasitic, chiefly on. the thaUi of Pertv^a- ricBjgloboso-turbinate, sessile or substipitate, somewhat shining, black, proper margin thick, connivent; thecse subpersistent, sporalmass black; spores simple (very rarely l-septate), black- ish ; hymenial gelatine usually more or less tinged with iodine. Spermogones with aoicular ar- cuate spermatia. The few species belonring to this genus are distinguished by the apothecia being parasitic, sessile or subsessile, and shining. At first sight they look like minute fanyi; but their aua- tomical structure places them among the lichens. Horn. (1825) p. 120 (iit genus Fmi-. Fig. 22. Sphinctrina tarbinata, Fr. -a. Apotheciuin (in dry state), X 30. b. Longitudinal section of two apothecia, x30. c. Tlieca and parapliyses, X 350. d. Spores, xSOO. e. Section of Bpermogomum, X30. /. Sterigmata and spermatia, X500. 1. S. turbinata Fr. Sum. Veg. (1846) p. 366.—Thallus none. Apothecia small, globose or globoso-turbinate, shortly stipitate, or often almost sessile, the sporal mass usually protruded; spores simple, globose or subglobose, small, 0,003-8 mm. in diameter; hymenial gelatine pale bluish, then sordid dark-coloured with iodine.—Nyl. Syn. i. p. 142, t. v. f. 1; Mudd, Man. p. 255, t. iv. f. 102 ; Cromb. Lioh. Brit. p. 11; Loight. Lich. PL p. 38, ed. 3,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectlichens, bookyear1894
