Graphis renschiana (Müll. Arg.) Stizenberger (1891: 196)

Kalb, Jutarat, Lücking, Robert & Kalb, Klaus, 2018, The lichen genera Allographa and Graphis (Ascomycota: Ostropales, Graphidaceae) in Thailand-eleven new species, forty-seven new records and a key to all one hundred and fifteen species so far recorded for the country, Phytotaxa 377 (1), pp. 448-450 : 448-450

Graphis renschiana (Müll. Arg.) Stizenberger (1891: 196) .

Syn.: Graphina renschiana Müller Arg. (1885: 512) .

Type :— MADAGASCAR, Hildebrandt s.n. ( G!, holotype) .

Thallus corticolous, whitish gray, continuous, smooth or uneven, corticate, dull. Lirellae erumpent, with a thick lateral thalline margin, elongate, up to 2 mm long, straight, curved or sinuous, unbranched or scarcely irregularly branched, labia convergent, entire, partly whitish pruinose, disc concealed, ( lineola - or deserpens- morph). Exciple laterally carbonized; hymenium clear; ascospores 4–8/ascus, hyaline, submuriform, 7–13 × 0–5-septate, 40–50 × 6–12 μm.

Chemistry: norstictic acid (major).

Distribution and habitat:—Pantropical, reported from U.S. A. Florida ( Seavey et al. 2017), Africa ( Joshi et al. 2016), Madagascar (type locality), China (as Graphina symplocorum Zahlbr. ), Philippines (as Graphis antillarum var. manilensis ) (all synonyms from Lücking et al. 2009), Vietnam ( Joshi et al. 2013) and for the first time from Thailand by Pitakpong et al. (2015). Here it is reported from South Thailand for the first time where it was growing in a benjamin fig plantation at low elevations.

Remarks:—The report from Florida (see above) is somewhat dubious, because the authors state “Lirellae long, 1–8 mm long, richly branched ...”, but in the type they are unbranched ( lineola -morph) and only 1–2 mm long, and they are also unbranched or only scarcely branched in the type of Graphis antillarum var. manilensis Vain. which is considered a synonym of G. renschiana . The same is due to the report from Vietnam ( Joshi et al. 2013), where even the authors are not sure about their identification. Graphis norstictica is very similar to this species, but differs in having broader ascospores (35–50 × 17–25 μm).

Material from Thailand reported:— Chiang Rai province: Mae Chan district, tambon Pa Tueng, surroundings of Huai Kang Pla Waterfall, in a disturbed and dry mixed evergreen forest with Pinus kesiya , 600 m, 20°05’29’’ N, 99°46’54’’ E, 6 December 2016, J. Kalb & K. Kalb s.n. (hb. K. & J. Kalb 41804)— Chiang Mai province: Khun Khan National Park, in a mixed deciduous forest, (SUT-501) ( Pitakpong et al. 2015)— Chumphon province: Thung Tako district, in the area of Ouwmamueng school, in a benjamin fig plantation ( Ficus benjamina ), 20 m, 10°06’24’’ N, 99°08’09’’ E, 6 September 2008, J. Sutjaritturakan 1460, (hb. K. & J. Kalb 42434).