Imshaugia placorodia (Ach.) S.L.F. Mey., 1985
| Common name | American Starburst |
|---|---|
| Code | IMSHPLA |
| Field Characters | Small, leafy lichens. Thalli typically appressed to loosely appressed, with lobes 1-2 mm wide. Upper cortex white to browned, with a crepe-like texture and slightly shiny sheen. Lower cortex typically pale to tan brown, with short, simple rhizines. No vegetative propagules. Apothecia common, relatively large, stipitate, with a brown disc and white irregular margin. Pycnidia common, black, barrel shaped, superficial. |
| Similar species & genera |
Imshaugia aleurites: isidiate.
Parmeliopsis hyperopta: with laminal, circular soralia, K+pale yellow (atranorin). Physcia: typically maculate, lower cortex white or pale, apothecia when present with a black disc, pycnidia when present are immersed, not promimant. |
| Ecology | Epiphytic, on conifer branches and downed wood. Most common in eastern boreal region of Alberta, in open well-lit woodlands including both dry (jack pine) and wet (black spruce) sites. |
| Chemistry | Cortex PD+ deep yellow to orange, K+ deep yellow, KC-, C- (thamnolic acid). |
| Molecular support |
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| Links | |
| Gallery |
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- Imshaugia placorodia, McClelland Lake region, AB
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- Imshaugia placorodia, McClelland Lake region, AB
