Polyblastidium appendiculatum (Kurok.) Kalb, 2015

Mongkolsuk, Pachara, Meesim, Sanya, Poengsungnoen, Vasun, Buaruang, Kawinnat, Schumm, Felix & Kalb, Klaus, 2015, The lichen family Physciaceae in Thailand-II. Contributions to the genus Heterodermia sensu lato, Phytotaxa 235 (1), pp. 448-450 : 448-450

1. Polyblastidium appendiculatum (Kurok.) Kalb , comb. nov. ( Fig. 10C )

Mycobank MB 813838

Basionym: Anaptychia appendiculata Kurok., Beih. Nova Hedwigia 6: 61 (1962). Type:— IVORY COAST, Cercle of Man, Mont Tonkoui, Rocher aux Sacrifices, on Hymenodictyon floribundum , in the outskirt of a low forest, ca. 1100 m, 14 August 1954, R. Santesson 10645a (holotype UPS!); Heterodermia appendiculata (Kurok.) Swinscow & Krog, Lichenologist 8: 114 (1976).

Thallus foliose, orbicular to irregularly spreading, loosely adnate, 5–12 cm wide. Lobes 1.0– 1.5 mm wide, broadening to ca. 2–3 mm wide at the tips, plane to weakly convex or weakly concave, sublinear-elongate, dichotomously to digitately branched, radiating, the apices not ascending, contiguous to discrete, eciliate. Upper surface greenish white, whitish gray to cream-colored, epruinose, with marginal dorsiventral phyllidia, more rarely also laminal, usually minutely dissected, often granular near the tips or the whole phyllidia becoming granular and appearing sorediate. Medulla white. Lower surface ecorticate, ± compact, violetgray in the centre, violet-striate towards the apices; yellow pigments absent. Rhizines marginal, initially simple and concolorous with the lower surface, later becoming black and squarrosely branched, 2–4 mm long. Apothecia laminal, adnate to substipitate, 1–4 mm wide; margin lobulate, the lobules becoming elongate and deeply dissected; disc concave, dark brown to blackish brown, ± thinly gray-pruinose. Ascospores Polyblastidia - type, ellipsoidal, with 0−2 sporoblastidia, 37–53

THE LICHEN FAMILY PHYSCIACEAE IN THAILAND —II

Phytotaxa 235 (1) © 2015 Magnolia Press • 39 × 18–25 µm. Pycnidia common, initially immersed, becoming emergent, visible as black dots; conidia bacilliform, 4–5 × 1 µm.

Chemistry: Cortex K+ yellow, C–, KC–, P+ yellow; medulla K+ yellow then red, C–, P+ yellow-orange; containing atranorin (major), zeorin (major), 16β-acetoxyhopane-6α,22-diol (major), leucotylin (minor), 6αacetoxyhopane-16β,22-diol (major), 6α,16β-diacetoxyhopane- 22-ol (minor), chloroatranorin (minor), norstictic acid (major), connorstictic acid (minor).

Distribution and habitat:—Rare on bark of deciduous trees ( Betula alnoides is reported) and on rocks in lower montane scrub, mixed deciduous forest, tropical rainforest and hill evergreen forest from 790 to 1470 m above sea level; also in Australia, Central America and the Caribbean, West and East Africa, Malaysia and New Zealand.

Remarks:—This lichen is characterized by having lobes with an ecorticate, non-pigmented lower surface, marginal phyllidia, ascospores with sporoblastidia and the presence of terpenes and norstictic acid in the medulla.

Material from Thailand examined:— Loei: Phuluang Wildlife Sanctuary, area of Kok Nok Kraba along trail to channel 7, in lower montane scrub, on bark of unidentified tree, 1470 m, 17°16'46'' N, 101°31'08'' E, 29 August 2005, W . Hongsachart WD 175, ( RAMK 21896 ); ibid., W . Hongsachart WD 192, ( RAMK 21898 ); area of Phu Luang Wildlife protection unit at Mae Num Sarn , in mixed deciduous forest, on rock, 790 m, 17°20'36'' N, 101°30'17'' E, 11 November 2008, S . Meesim & K . Buaruang, RU-MS 0098, ( RAMK 20929 ); area of Kok Toei, Forest protection unit, in mixed deciduous forest, on rock, 1200 m, 17°19'55'' N, 101°31'26'' E, 27 June 2008, S . Meesim & K . Buaruang, RU-MS 70, ( RAMK 21074 ); Helicopter apron side station, black rest home, in lower montane scrub, on rock, 1470 m, 17°16'46'' N, 101°31'08'' E, 26 September 2008, S . Meesim & K . Buaruang, RU-MS 82, ( RAMK 21086 ); Phitsanulok: Phu hin Rong Kla National Park , area of political and military schools, in tropical rainforest, on rock, 1165 m, 16°59'33'' N, 100°00'42'' E, 5 June 2003, P. Mongkolsuk, RU-PM 139, ( RAMK 21351 ); Kamphaeng Phet: Maewong , along trail Chong Yen , in hill evergreen forest, on bark of unidentified tree, 1340 m, 16°06'04'' N, 99°06'27'' E, 2 May 2006, S . Meesim , RU-MW14, ( RAMK 21847 ); ibid., on bark of Betula alnoides , 1340 m, 16°06'04'' N, 99°06'27'' E, 2 May 2006, S . Meesim, RU-MW14, ( RAMK 21848 ); Nakon Ratchasima: Khao Yai National Park , tropical rainforest SE of the main road no. 3077 between the park headquarter and Khao Khaeo , on bark of Ficus sp. , 875 m, 14°26'26'' N, 101°21'58'' E, 17 July 2003, W . Polyiam & N . Osathanon, RU-22407, ( RAMK 7646 ); Phetchaburi: Kaeng Krachan, along trail Khao Phanoenthung , in hill evergreen forest, on bark of unidentified tree, 1207 m, 12°53'07'' N, 99°37'53'' E, 12 February 2006, S . Meesim, RU-MW120, ( RAMK 21851 ); ibid., S . Meesim, RU-MW116, ( RAMK 21844 ) .

Figures

FIGURE 10. A. Leucodermia boryi, fertile specimen (scale 5 mm). B. Leucodermia leucomelos, sorediate specimen (scale 5 mm). C. Polyblastidium appendiculatum (scale 5 mm). D. Polyblastidium fragilissimum (scale 5 mm). E. Polyblastidium hypocaesium (scale 5 mm). F. Polyblastidium hypoleucum (scale 5 mm).