Acarospora schleicheri (Ach.) A.Massal.
Urceolaria schleicheri Ach., Lich. Univ.: 332 (1810).
Thallus bright yellowish-green, spreading irregularly, areolate-cracked, like a jig-saw puzzle, very closely attached, separated by narrow cracks, crustose to squamulose-areolate, areolae very variable, minute, to 3--4 mm diam., scattered to contiguous, plane, concave to convex, ± lobate at margins, terricolous or saxicolous. Apothecia to 1 mm diam., ± solitary, ± marginate and often with bands of sterile tissue centrally, disc yellowish or brownish, often pruinose. Ascospores 3-4 × 2-2.5 µm. Chemistry: Rhizocarpic acid.
S: Canterbury, Otago, in drier eastern parts, alpine or subalpine.
Cosmopolitan
