Flora of New Zealand Series

R. otagensis (Zahlbr.) Mayrhofer, Lichenologist 15: 275 (1983).

* Account prepared by Dr H. Mayrhofer (Graz).

Buellia otagensis Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 373 (1941).

B. nitrophila Zahlbr., Denkschr. Akad. Wiss. Wien math.-naturwiss. Kl. 104: 372 (1941).

Holotype: New Zealand. Otago, Otago Heads, on coastal rock. January 1934. J.S. Thomson ZA 31, W.

B. nitrophila. Lectotype: New Zealand. Otago, Black Head, Dunedin. On coastal rocks. J.S. Thomson (T 394) A 84, CHR 374331!

Thallus thin, whitish-grey to brownish-grey, membranous or rimose, rarely rimose-areolate, prothallus blackish or evanescent, saxicolous. Apothecia zeorine to lecideine, innate to adnate, frequent, sometimes contiguous, to 0.5 mm diam., disc concave to plane, blackish. Excipulum blackish-brown. Hymenium 80-100 µm tall. Epihymenium dark brown. Ascospores of Dubyana -type, 12-16 × 8-10 µm, wall finely warted. Chemistry: TLC-.

N: Wellington (Lyall Bay). S: Otago (Otago Heads, Black Head, Brighton). On coastal rocks.

Endemic