Ramalina roesleri (Hochst. ex Schaer.) Nyl.

Sharifi, Maryam, Mehregan, Iraj, Sohrabi, Mohammad, Larijani, Kambiz & Sipman, Harrie, 2025, A synopsis of the lichen genus Ramalina (Ramalinaceae) in Iran, Phytotaxa 702 (3), pp. 255-273 : 268

Ramalina roesleri (Hochst. ex Schaer.) Nyl. ; Mycobank #403821

Hue, Rev. Bot. 6: 151 (1887). – Ramalina fraxinea var. roesleri Schaer., 1850 .

Type:― In Germaniae sylva Schwartzwald prope Freudenstadt, leg. Roesler (not seen) ( Krog & James 1977).

The voucher mentioned by Riahi & Valadbeigi (2004) and Seaward et al. (2008) was unfortunately not available for review during this study. The description below is derived from Krog & James (1977) and Nimis & Martellos (2024).

Thallus fruticose, shrubby, erect to subpendulous, small, 1 to 5 cm long, light green. Lobes densely branched, with fine and slender branchlets, typically hooked at the apex, with delicate, hollow central stems, 1–2.5 mm in width. Soralia dot-like, subterminal or terminal. Soredia few, granular, and coarse, not corticate. Apothecia not seen.

Chemistry: Medulla spot tests K–, C–, KC–, PD–, UV–; TLC: Usnic and sekikaic acids ( Nimis & Martellos 2024).

Ecology and distribution: Ramalina roesleri has been reported for Iran since 2004 ( Riahi & Valadbeigi 2004, Seaward et al. 2008). This species grows on shrubs, branches, and twigs of trees in open, humid environments. In the adjacent countries, it is reported from Turkey ( Özturk & Guvenc 2010).

Note: The combination of hollow lobes and dot-like soralia is unmistakable. ( Krog & James 1977).

Specimens examined: MAZANDARAN PROVINCE: Tonekabon county, ca 46 km from Tonekabon-Se Hezar Road, ca 1 km form Ghazi Mahaleh village, beside the road, GPS: 50.8578321 N, 36.48903056 E, 1680 m., 2018, trunk of Quercus, M. Sohrabi & Ch. Printzen 21634 (Herb. M. Sohrabi).