. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. ] LEOANO-tECIBEFJ. 511. 63. VARICELLARIA Nyl. Mem. Soo. Cherb. t. v. (1857) p. 117 ; Lich. Scand. p. 182.—Thallus thinly orusta- ceous, pulveraoeous or subleprarioid. Apottecia variolarioid or sorediiform (in convex verrucse), pale, carneo- punctate or suffused; thecse ventri- cose, monospored; spores very large, 1-septate, colourless ; paraphyses scanty, subdisorete, slender, variously arcuate. Spermogones not yet seen. Among other characters w
. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. ] LEOANO-tECIBEFJ. 511. 63. VARICELLARIA Nyl. Mem. Soo. Cherb. t. v. (1857) p. 117 ; Lich. Scand. p. 182.—Thallus thinly orusta- ceous, pulveraoeous or subleprarioid. Apottecia variolarioid or sorediiform (in convex verrucse), pale, carneo- punctate or suffused; thecse ventri- cose, monospored; spores very large, 1-septate, colourless ; paraphyses scanty, subdisorete, slender, variously arcuate. Spermogones not yet seen. Among other characters well distin- guished from Pertusaria hy the septate spores, which are also the largest observed among lichens. Only a single species is known, which has recently been recorded as British. 1. V. miorosticta Nyl. Mem. Soc. Cherb. t. V. (1857) p. 117; Lich. Scand. p. 183, t. i. f. 8.—Thallus effuse or subdeterminate, unequal, rimose or granulato-pulverulent, sub- leprose, whitish (K -, CaCl —). Apo- thecia moderate,prominent, rotundate, above plane or unequal, often 2-3 confluent, white-suffused or denudate, concolorous within; spores ellipsoid or ovoid, 0,225-0,350 mm. long, 0 095-0,115 mm. thick; hymenial gelatine and the thecse deep blue (then often denigrate) with iodine.—Cromb. Journ. Bot. 18S2, p_ 274. According to Th. M. Fries (Lich. Scand. p. 322) it is Pertusaria rhodocarpa Koerb. Syst. Lich. Germ. p. 384, " sec. spec, ;; but as Koerber's diagnosis by no means corresponds, the specific name of Nylander must be adopted. When sterile and less developed the plant looks quite like a leprarioid or variolarioid state of some Pertusaria. The apothecia are innate in the thalline glomerules, subglohose or at length depressed; in the two British specimens they are only sparingly present in a rightly developed condition. Hab. On the ground in an alpine situation.—Distr. Extremely local and scarce on one of the N. Grampians, Scotland; though it probably also o
Size: 993px × 2517px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectlichens, bookyear1894
