Hypotrachyna vexans (Zahlbr. ex W.L.Culb. & C.F.Culb.) Divakar, A.Crespo, Sipman, Elix & Lumbsch

Wang, Xin Yu, Zhang, Yan Yun, Liu, Dong, Li, Li Juan, Yang, Mei Xia, Yin, An Cheng & Wang, Li Song, 2020, Taxonomic study of Hypotrachyna subg. Everniastrum (Hale ex Sipman) Divakar, A. Crespo, Sipman, Elix & Lumbsch (Ascomycota) from China, Cryptogamie, Mycologie 20 (12), pp. 193-209 : 208

15. Hypotrachyna vexans (Zahlbr. ex W.L.Culb. & C.F.Culb.) Divakar, A.Crespo, Sipman, Elix & Lumbsch

Phytotaxa 132 (1): 33 (2013).

SELECTED SPECIMENS EXAMINED. — China, Taiwan Prov., Alishan Mt, Kainoodai; 26.XII.1925; Asahina 79 (holo-, W[W]). Jiayi Co., Alishan Forest Park; 23°30.653’N, 120°48.984’E; 2307 m, on decaying bark; 26.IX.2015; L. S. Wang 15-49391. Taizhong Ci., Shaolaishan Mt; 24°15’N, 121°58’E; 2300 m, on bark; 25.IV.2007; CK Lin L4483, L4511. Yunnan Prov., Tengchong Co., Houqiao Vil.; 25°11.075’N, 98°19.906’E; 1910 m, on bark; 28.III.2012; L. S. Wang 12-33385. Pu’er Ci., Caiyanghe Forest Reserve; 22°35’59.17”N, 101°07’01.19”E; 1688 m, on bark; 29.IV.2012; L. S. Wang 12-33803.

NOTES

For a detailed description, see Culberson & Culberson (1981).

This species is characterized by a sparsely to densely isidiate upper surface, and the isidia are usually short or granulose ( Fig. 5D ), lacking rhizines on the lower surface and having sparse marginal cilia. H. fragilis also has isidia on the upper surface but differs by its long and fragile isidia (up to 3 mm long), usually coralloid-branched, and lobes that are wide and short, usually flat and appressed. In contrast, in H. vexans , the lobes are long and usually involute, and the lobe tips mostly curve downward. H. subvexans , with similar isidia, can be distinguished by the absence of salazinic acid in the thallus (medulla K-) and wide lobes up to 3 mm wide.

Figures

FIG. 5. — Type specimens showing special characters:A, Hypotrachyna rhizodendroidea (J.C.Wei & Y.M.Jiang) Divakar,A.Crespo,Sipman,Elix & Lumbsch showing short, thick and irregularly branched cilia (J. C. Wei 762, HMAS); B, H. sinensis (J.B.Chen & J.C.Wei) Divakar, A.Crespo, Sipman, Elix & Lumbsch showing lobules on the upper surface (J. B. Chen 10488, HMAS);C, H. subsorocheila (Y.M.Jiang & J.C.Wei) Divakar, A.Crespo,Sipman,Elix & Lumbsch showing granulose soralia (J. C. Wei 9247, HMAS); D, H. vexans (Zahlbr. ex W.L.Culb. & C.F.Culb.) Divakar, A.Crespo, Sipman, Elix & Lumbsch showing short and granulose isidia on the upper surface (Asahina 79, W). Scale bar: A, B, D, 1 mm; C, 2 mm.