The British species of angiocarpous lichens, elucidated by their sporidia / by W.A. Leighton.

  • Leighton, W. A. (William Allport), 1805-1889.
Date:
1851
Catalogue details

Licence: Public Domain Mark

Credit: The British species of angiocarpous lichens, elucidated by their sporidia / by W.A. Leighton. Source: Wellcome Collection.

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    in the double membrane peculiar to this genus. See Plate X. fig. 1. 3. P. FALLAX, Hook. Sporidia in asci 8, about the same as in the last, elliptical, pale yellow, with the hya- line double membranous envelope. Plate X. fig. 2. Vebbucakia FALLAX, Pers. (fide AcU^ Lichen ? hymenius, Ach. Prod. 80. (1798.) — — Sm. E. Bot. 1731. THELOTEEMA HYJIENITJM, Acli. Meth. 133. (]S03.) — — Turn, and Borr. Licli. Brit 185. Pektusakia WuLFENii, B. C. K. Fr. ed. 3. ii. 320. (1805.) — — Fries, L. Bef. 424! POKINA FALLAX, Ac/l. SjU. 110. (1814.) — — Ta?/l. Fl. Hib. pt. ii. 102. Pebtusakia FALLAX, Hook. Br. Fi. ii. 160. Sussex! Mr. Borrer. Barmouth ! Oswestry, Shropshire ! Mev. T. Salwey. Spec, exsicc.! Bolder s Lich. Brit. In this the nuclei appear to have become confluent, and spread out into a disk, surrounded by the abrupted margins of the thallodal verruca, in which they were originally imbedded. The asci are very large, and the sporidia more regularly developed, being generally 8 in number, but of the same form, though smaller in size, as in P. communis and its varieties; the paraphyses are also similar. 4. P. MELALEUCA. Sporidia in asci 2, about the same size as the last, elliptical, pale yellow, with a hyaline double envelope or margin. Plate X, fig. 3. Lichen melaleucus, Sm. E. Bot. 24G1. (1812.) Thelotkema melaleuchm, Turn, and Borr. Lich. Brit. 183. (1813.) — — Booh. Br. Fl. ii. 161. Pertusaria communis, d. leioplaca, Fries. L. Ref. 421P (1831.) St. Leonard's Forest, Sussex! Mr. Borrer. The sporidia clearly show that this plant does not belong to the genus Thelotrema.
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