Xanthoparmelia chlorochroa (Tuck.) Hale, 1974
| Common name | Tumbleweed Rockfrog | ||
|---|---|---|---|
| Code |
XANTCHL | ||
| Field Characters | Medium-sized, leafy chlorolichen. Thalli unattached (vagrant), to loosely attached. Lobes typically wide and completely inrolled forming tubular thalli. Upper surface pale yellow, without maculae. No vegetative propagules present. Lower cortex typically brown to black, with relatively abundant, simple to sparsely branching rhizines concolorous with the lower cortex, that are largely hidden from sight. Apothecia rare. | ||
| Similar species |
Xanthoparmelia wyomingica: lobe edges more crenulate and grasping, typically more attached to substrate, upper cortex lacking maculae, lobes not as regularly inrolled so edges typically not visible from above, narrower lobed, branching more irregular.
Xanthoparmelia camtschadalis: lobes typically flat with just inrolled margins, not forming tubes, lower cortex visible; maculate. Apparently more common than X. chlorochroa. |
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| Ecology | Mostly terricolous on mosses, soil or litter. Most common in the grasslands, occasional in the mountains and southern parklands. | ||
| Chemistry | Upper cortex PD+ pale yellow or PD-, C-, KC+ yellow, UV- (usnic acid). Medullary chemistry complex, variable and apparently not a good taxonomic trait, always UV-, may be PD- or PD+ yellow to red, K- or K+ yellow to dark rusty red (norstictic acid, salazinic acid, plus accessories). AB collections TLCed: 2. | ||
| Molecular support |
Moderate at the species level. Multiple studies have found that historical morphological and chemical traits do not correspond well to molecular clades (Leavitt et al. 2011a, b), and preliminary analyses of limited AB sequences fall into 2 clades. Until more extensive molecular work is done, we continue to follow historical morphological species delimitation. | ||
| Links | |||
| Gallery |
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- Xanthoparmelia chlorochroa, southern AB
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- Xanthoparmelia chlorochroa, Mattheis Ranch area, AB
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- Xanthoparmelia chlorochroa Acadia Valley, AB
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- Xanthoparmelia chlorochroa Acadia Valley, AB
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- Xanthoparmelia chlorochroa, Mattheis Ranch area, AB
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- Xanthoparmelia chlorochroa upper cortex close-up, Mattheis Ranch area, AB
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- Xanthoparmelia chlorochroa, Mattheis Ranch area, AB
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- Xanthoparmelia chlorochroa, Mattheis Ranch area, AB
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- Xanthoparmelia chlorochroa Drumheller, AB
