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Cladonia robbinsii A. Evans, 1944

Common name Yellow-tongue Cladonia
Code CLADROB
Field Characters Squamulose chlorolichen. Thick yellow-green to green squamules, typically ascending to erect and reflexed when dry, unfurling when hydrated. Lower medulla varies from cream to pale yellow, rarely white. Upper cortex often shiny. Very rarely fertile, and then with very short podetia bearing medium-brown apothecia.
Similar species
Cladonia symphycarpa group: Lower surface of squamules white, squamules typically thinner, chemistry variable but never usnic yellow or KC+ yellow. Some shaded colonies of Cladonia robbinsii require TLC to distinguish from C. symphycarpa.

Cladonia magyarica: Squamules grey-green, almost always with some immature, narrowly cupped podetia, PD+ orange, K+ yellow, KC- (atranorin, fumarprotocetraric acid).

Other usnic Cladonia almost always produce podetia.

Ecology Terricolous, on soil, litter and dead Selaginella densa in grassland and parkland sites.
Chemistry PD-, K-, KC+ yellow, UV- (usnic acid, barbatic acid)
Molecular support
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