Punctelia stictica (Delise ex Duby) Krog, 1982
| Common name | Blue-shift Speckled-back Lichen |
|---|---|
| Code | PUNCSTI |
| Field Characters | Medium to large leafy chlorolichen. Thalli loosely appressed to slightly ascending, with rounded lobes 3-10 mm across forming up-to-palm-sized thalli. Upper cortex brown to bluish-grey, wrinkled to slightly reticulate. The lobe tips vary from epruinose to sparsely pruinose. Laminal pseudocyphellae abundant, developing into pale, granular, aggregated soredia, contrasting with the cortex. Lower cortex black centrally, brown marginally, with short, simple rhizines that resemble a “buzz cut”. Apothecia not observed in Alberta. |
| Similar genera |
Redeterminations of PMAE collections found collections of this species under Hypogymnia austerodes (inflated lobes) and Parmelia saxatilis (smaller, angular lobes with shiny isidia). |
| Ecology | Saxicolous. Known only to date from the southwest part of Alberta, in partially shaded sandstone outcrops of the Paskapoo formation, in dry forests |
| Chemistry | Upper cortex K+yellow, PD- or PD+ pale yellow, C-, KC-, UV- (atranorin). Medulla K-, PD-, C+ pink, KC-, UV- (gyrophoric acid, decarboxygyrophoric acid). |
| Molecular support |
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| Links | |
| Gallery |
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- Punctelia stictica, on sandstone in the Paskapoo Formation, west of Calgary, AB
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- Punctelia stictica, on sandstone in the Paskapoo Formation, west of Calgary, AB
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- Punctelia stictica, on sandstone in the Paskapoo Formation, west of Calgary, AB
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- Punctelia stictica, on sandstone in the Paskapoo Formation, west of Calgary, AB
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- Punctelia stictica, on sandstone in the Paskapoo Formation, west of Calgary, AB
