Arctoparmelia separata (Th. Fr.) Hale, 1986
| Common name | Rippled Ring Lichen |
|---|---|
| Code | ARCTSEP |
| Field Characters | Leafy, yellow chlorolichen. Thalli appressed, often imbricate. Lobes narrow, angular, irregularly branching, typically to 0.4 cm across. Upper cortex dull, pale yellow in younger lobes, darkening in older lobes. No vegetative propagules. Lower cortex grey to black or purplish black (check towards the centre of the thallus, not at the lobe tips), with sparse simple rhizines. Apothecia occasional, relatively large, on short stipes, with brown disc and thin yellow thalline margins (lecanorine). |
| Similar species & genera |
Arctoparmelia separata: lower cortex white to pale brown.
Arctoparmelia incurva, A. subcentrifuga: sorediate. Parmeliopsis ambigua: sorediate. Xanthoparmelia: rhizines commonly branched, lower cortex often black or dark brown (vs. white), cortices often shiny, medulla often PD+ orange to red. |
| Ecology | Saxicolous, typically on granitic rock. Occasional in the shield region of Alberta, apparently absent elsewhere. |
| Chemistry | Upper cortex KC+ yellow, K+ yellow, C-, PD- or PD+ pale yellow, UV- (usnic acid, atranorin). Medulla KC-, K-, C-, PD-, UV-. AB collections TLCed: 1. |
| Molecular support |
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| Gallery |
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- Arctoparmelia separata
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- Arctoparmelia separata
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- Arctoparmelia separata
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- Arctoparmelia separata
