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Peltigera castanea Goward, Goffinet & Miadlikowska Image location: Philip Lake, Wells Gray region, British Columbia, Canada growing on wet mossy boulder beside trail on mesic slope near ESSF These photos were taken of the population at the type locality. (It’s only known from four or five locations worldwide, all in BC, Yukon and Alberta.) It is useful to compare them to the other two sorediate Peltigera, P. extenuata and P. didactyla: didactyla: disturbed soil banks extenuata: sheltered mossy banks and rocks castanea: open mossy rocks didactyla: thallus simple, even cup-like raised margins, scattered extenuata: thallus multi-lobed, wavy margins esp. in age, sprawling and overlapping castanea: thallus multi-lobed, somewhat intermediate?, overlapping didactyla: rhizines thin and pointed, bare near margin extenuata: rhizines brush-like, forming projecting dense woolly mats right to the edge castanea: rhizines brush-like but not densely matted, bare near margin didactyla: nearly always becomes fertile in age extenuata: very rarely fertile (I’ve never seen it) castanea: not known to be fertile didactyla: hairless or becoming tomentose near apothecia in age extenuata: generally tomentose all over (not apparent when young and wet) castanea: becoming densely tomentose mostly near the margins The color also differs, but this is a hard character since it is so variable within each depending on age and moisture content. As the name would imply, castanea is browner. Also castanea turns dark underneath toward the center, while extenuata stays white to pale brownish even in old specimens. Recognized by sight
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 21:34, 15 May 2018 | | 1,632 × 1,224 (514 KB) | Leoboudv | =={{int:filedesc}}== {{Information |Description='''''Peltigera castanea''''' Goward, Goffinet & Miadlikowska Image location: Philip Lake, Wells Gray region, British Columbia, Canada growing on wet mossy boulder beside trail on mesic slope near <span class="caps">ESSF</span> These photos were taken of the population at the type locality. (It’s only known from four or five locations worldwide, all in BC, Yukon and Alberta.) It is useful to compare them to the other two sorediate [htt... |
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