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Lichens (1985) - Flora of New Zealand Lichens
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Protoblastenia rupestris (Scop.) J.Steiner

P. rupestris (Scop.) Steiner, Verhandl. zool.-bot. Ges. Wien 61: 47 (1911).

Lichen rupestris Scop., Fl. carn. 2: 363 (1772).

Thallus greenish-white to greenish-grey, smooth, irregularly cracked, often lacking or immersed. Apothecia sessile or subimmersed, 0.3-0.8 mmdiam., disc dull orange-red (K+ purple). Ascospores ellipsoid, simple, 8-15 × 5-8 µm. Chemistry: Emodin, parietin (main pigment), teloschistin, fallacinal and parietinic acid.

S: Canterbury (Castle Hill). On limestone.

Cosmopolitan

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