LICHEN GENUS MICAREA IN EUROPE 149 Lecidea antrophila Larb. ex Leighton in Trans. Linn. Soc. London (Bot.) II, 1: 242 (1876). Type: Ireland, West Galway, Mwellan near Kylemore, in <strong>the</strong> interior <strong>of</strong> a cave, 1877, C. Larbalestier (BM ex K - lectotype!; isolectotypes: BM!, BM ex K!). Lecidea paucula Nyl. in Flora, Jena 59: 573 (1876). Type: Ireland, West Galway, 'Montagnes de Maam' [Maumturk Mountains], iii 1876, C. Lflr/?fl/e5ner(H-NYL 20090 -holotype!). Micarea umbrosa Vezda & V. Wirth in Folia geobot. phytotax., Praha 11: 93 (1976). Type: Germany, Baden, Siidschwarzwald, between Neuhausle and Altglashiitte near St. Margen, 830 m, 2 v 1969, V. Wirth (hb. Wirth 1609 - holotype!). Lecidea granvina Vainio in Havaas in Bergens Mus. Arb. 1909 (1): 31 (1909); nom. nudum (Art. 32). Spec. orig.: Norway, Hordaland, Hardanger, Granvin, 10 xi 1900,7. J. Havaas (BG!). Lecidea demarginata auct. p.p., non Nyl.; see 'Excluded Taxa'. Note: typification <strong>of</strong> Lecidea lutulata. Larbalestier's ga<strong>the</strong>rings in BM and H, that were collected from Rozel meadow in 1873 and subsequently labelled 'Lecidea lutulata', consist <strong>of</strong> M. bauschiana, M. lutulata and M. peliocarpa. The specimen H-NYL 10696 contains M. lutulata only and agrees with <strong>the</strong> original diagnosis, e.g. 'hypo<strong>the</strong>cium fusconigricans crassum', and is <strong>the</strong>refore selected as lectotype. Thallus effuse, thin (up to 40 /xm thick), ± smooth or finely rimose, usually becoming thicker (up to 600 jxm thick) and scurfy-granular (but never forming discrete areolae or goniocysts) pale , greenish grey or grey-green, sometimes straw-coloured in part, sometimes oxydated (on ferruginous rocks); in section ecorticate and without an amorphous hyaline covering layer. Phycobiont not micareoid; cells thin-walled, ± globose, c. 5-12 /xm diam, or ellipsoid and up to 15x8/xm. Apo<strong>the</strong>cia numerous, convex-hemispherical and immarginate from <strong>the</strong> start, later becoming ± globose or tuberculate, grey-brown, dark brown or blackish, always turning blackish when moistened, 0-2-0-4 mm diam, or up to 0-8 mm diam when tuberculate. Hymenium 30-40 ^im tall; upper part varying from hyaline or pale fuscous-brown through olivaceous to dark aeruginose, pigment <strong>of</strong>ten in patches corresponding to clustered apices <strong>of</strong> stout paraphyses, K- , HNO3+ red; lower part hyaline or dilutely coloured. Asci cylindrical-clavate, c. 30-40x7- 10 /am. Spores ellipsoid, ovoid, or sometimes dacryoid, 6-8 (-9) x 2-3 (-3 -4) yam. Paraphyses ra<strong>the</strong>r scanty, <strong>of</strong> two types: p.p. evenly distributed, irregularly flexuose, simple, or forked or with short branches (especially in <strong>the</strong> upper part), sometimes anastomosing, 0-8-l(-l-5) ^tm wide, apices sometimes irregularly swollen to c. 2 ^tm wide; p.p. fasciculate, mostly simple, stout, c. 1-5-2 /xm wide, with swollen (to 3 /xm), coherent, pigmented apices. Hypo<strong>the</strong>cium 120-360 /x,m tall, dark and opaque, fuscous- or reddish brown, K- or -I- reddish intensifying (but never with purple or greenish tinges), HNO3-; hyphae interwoven, but becoming vertically orientated towards <strong>the</strong> hymenium, c. 1-5-2 /xm wide but coated with dense brown pigment and appearing 3-4 /xm wide; ascogenous hyphae with swollen cells c. 2-4 /xm wide. Excipulum not seen even in sections <strong>of</strong> young apo<strong>the</strong>cia; <strong>the</strong> hymenium soon becomes reflexed so as to form an excipulum-like zone below <strong>the</strong> hypo<strong>the</strong>cium. Pycnidia <strong>of</strong>ten present but inconspicuous, immersed, blackish, c. 80-200 /xm diam, ostiole <strong>of</strong>ten gaping; with a single ± globose locule but walls <strong>of</strong>ten convoluted with up to 5 locules seen in a vertical section; outer walls reddish brown, K-; inner walls <strong>of</strong> secondary locules hyaline; conidiogenous cells irregularly cylindrical, <strong>of</strong>ten with 1-2 percurrent proliferations, 7-10x1-1-5 /xm, base sometimes swollen to 2-7 /xm wide; conidia (mesoconidia) cylindrical, sometimes faintly biguttulate but not constricted in <strong>the</strong> middle, (3-8-)4-5(-5-5)x0-9-l-4/xm. Chemistry: All parts K-, C-, PD-; t.l.c: no substances detected. Observations: The apo<strong>the</strong>cia <strong>of</strong> M. lutulata have a similar internal pigmentation to those <strong>of</strong> M. botryoides {q. v. ) and M. muhrii {q. v. ), but <strong>the</strong> species is most <strong>of</strong>ten confused with M. sylvicola. The latter shares <strong>the</strong> same habitat as M. lutulata, but can be distinguished by its hypo<strong>the</strong>cium which always has a distinctly green, or rarely purplish, tinge in water mounts or KOH; in HNO3 <strong>the</strong> pigment(s) turn purple-red. M. sylvicola fur<strong>the</strong>r differs in its larger spores, taller hymenium, slightly longer and broader conidia, and presence <strong>of</strong> greenish pigment in its pycnidial walls. M. myriocarpa occurs in similar habitats to M. lutulata and has a reddish brown, but never opaque (in thin section) hypo<strong>the</strong>cium. Fur<strong>the</strong>rmore, M. myriocarpa has smaller apo<strong>the</strong>cia, narrower, <strong>of</strong>ten 1-septate spores, and sessile pycnidia with much shorter conidia.
150 BRIAN JOHN COPPINS Map 11 Micarea lithinella ® 1950 onwards + Micarea lutulata • 1950 onwards O Before 1950 Habitat and distribution: M. lutulata is found on rocks and sometimes exposed roots in dry rocky underhangs, and is a characteristic species <strong>of</strong> <strong>the</strong> Micareetum sylvicolae. It is apparently widespread in nor<strong>the</strong>rn and western Britain; and although not yet reported from <strong>the</strong> south-west peninsula <strong>of</strong> England or <strong>the</strong> north-west <strong>of</strong> Scotland, it almost certainly occurs in those areas. It appears to be Uttle known outside <strong>of</strong> <strong>the</strong> <strong>British</strong> Isles, but I have seen material from Norway (Oppland and Hordaland), Sweden (Varmland), sou<strong>the</strong>rn Finland, Germany (Baden- Wiirttemberg), and Czechoslovakia (Bohemia: Krkonose). Exsiccata: Arnold Lich. Exs. 409B p.p. (WRSL). Havaas Lich. Exs. Norv. 571 (EG). Larbal. Lich. Herb. 223 (BM, BM ex K). Rasanen Lich. Fenn. 612 p. p. (LD-mixed with M. tuberculata) 22. Micarea melaena (Nyl.) Hedl. '(Figs21A,46A;Mapl2) in Bih. K. svenska VetenskAkad. Handl. Ill, 18 (3): 82, 96 (1892). - Lecidea melaena Nyl. in Bot. Notiser 1853: 182 (1853). - Lecidea vernalis var. melaena (Nyl.) Nyl. in Mem. Soc. Imp. Sci. nat. Cherbourg. 3: 182 (1855). - Bacidia melaena (Nyl.) Zahlbr. in Annls mycol. 7: 474 (1909). Type: Sweden, on lignum, E. M. Fries, Lich. Suec. Exs. 212B (UPS-lectotype!; isolectotypes: C!, H-NYLp.m. 4778 [fragment]!, M!). Lecidea milliaria var. turfosa Fr. , Nov. Sched. Crit. 8: 7 (1826), non Biatora turfosa Massal. Type: Sweden, [? Smaland], on peaty turf, E. M. Fries, Lich. Suec. Exs. 212A (UPS-lectotype!; isolectotypes: C!, M!). .
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conferanda (Lecidea) 205 confusula
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populina (Lecidea, Micarea) 31,32 p