Flora of New Zealand Series

≡Lecidea subtubulata C.Knight, Trans. Linn. Soc. ser. 2, Bot. 1: 277 (1877).

≡Blastenia subtubulata (C.Knight) Müll.Arg., Bull. Herb. Boissier 2, App. 1: 69 (1894).

=Lecidea exsoluta Nyl., Lich. Nov. Zel.: 112 (1888).

≡Buellia exsoluta (Nyl.) Müll.Arg., Bull. Herb. Boissier 2, App. 1: 71 (1894).

Lectotype: New Zealand. Sine loco [probably Wellington], Charles Knight, Herb Knight Vol. 52A, P. 26 – WELT [fide Mayrhofer (1983: 276)]. Isolectotype – BM.

Lecidea exsoluta. Holotype: New Zealand. Sine loco [probably Wellington], 1882, Charles Knight s.n. – H-NYL 10545. Additional material in H-NYL 10544, M (Mayrhofer 1983: 278).

Description : Thallus epilithic, evanescent, granular-cracked, greyish, without a prothallus. Apothecia lecideine, sessile, to 0.7 mm diam.; disc plane to subconvex, blackish, round to irregular, solitary to frequent. Inner part of exciple red-brown, outer parts blackish brown. Epithecium dark-brown. Hymenium 100–120 μm tall. Paraphyses 1–1.5 μm thick, apices to 5 μm diam. Hypothecium to 150 μm thick, yellowish brown, K−. Asci Lecanora -type. Ascospores Mischoblastia -type, spore onotgeny type A, torus well-developed, 18–23 × 9–11.5 μm.

Chemistry : TLC−, all reactions negative.

N: Wellington (Kapiti I., Wellington). On coastal rocks.

Endemic

Illustrations : Knight (1877: pl. XXXVII, fig. 12 – as Lecidea subtubulata); Mayrhofer (1983: 277, fig. 19); Kaschik (2006: 118, fig. 76).

Rinodina subtubulata is characterised by: the saxicolous (coastal rocks) habit; the evanescent thallus; and Mischoblastia -type ascospores.