#heterodermia

[lichenaday]

Heterodermia namaquana

How I look when I roll out of bed in the morning.

images: source | source

[taken-for-forest]

Powdered Fringe Lichen (Heterodermia speciosa), family Physciaceae

November 2024

[cedar-glade]

Heterodermia speciosa

The squarrose and ciliated showy two skin lichen aka “I could put a hair net on that” lichen. A common site in any Appalachian and ILP temperate rain forest on both trees and rocks.

Hetero= 2 dermia = old english dermal meaning of dermal tissue or skin. Heterodermia have two very different sections often incredibly different on their undersides

in Ohio we have to compare our undersides with H. obscurata which has golden yellow underside and H. albicans which can have more of a shadow lichen like appearance and may require chemical spot tests( , K+ red, salazinic acid. )

Add KY and TN along with the rest of the Appalachian mountains and it can get more hectic.

Heterodermia japonica is also a jerk to and the aquatic species Heterodermia psuedospeciosa is a definite lifer to me. There are so many more.

[lichenaday]

Heterodermia neglecta

Neglected fringe lichen, discarded fringe lichen

Lichens truly don't photograph well. Seeing these pictures doesn't compare to seeing a Heterodermia lichen in the wild, where its thick, almost cartoonishly perfect, pearly blue-gray lobes make it a really stand-out stunner. In these pictures she looks so bland, but trust me, you gotta see her in her natural habitat. This foliose lichen can be found in isolated populations in eastern North America, where it grows on hardwood trees. It has long, jagged lobes tipped with labriform (lip-like) soralia producing mealy, granular soredia. The margins of the lobes bear black, cilia-like rhizines. The lower surface lacks a cortex, and so appears cottony and pale white, pigmented orange toward the lobe tips and brown toward the central thallus. H. neglecta was only recently described in 2007 based off of differentiated herbarium specimens, but further investigation is needed as a number of chemotypes (specimens producing different chemicals) have been identified, and may constitute different species.

images: source | source | source

info: source | source

[cedar-glade]

Hell could be spelled with looking at Heterodermia, so pretty, so diverse, so hard to key out. I need to get over myself and get into chemical spot tests.

My go to is from this site and many other guides I own that really hit the yellow underside for this species and the medula being scratched yellow that really add as the easier indicator since there are 3 lichens that look too similar. : “lower surface: felted with rust-colored or yellowish-brown pigment, K+ purple, not to be confused with the bluish-black underside present in H. japonica, arachnoid, rhizinate; rhizines: black, marginal, simple to squarrosely branched”-

https://lichenportal.org/cnalh/taxa/index.php?taxon=55063&clid=1103

Heterodermia obscurata

obscure blackened two skinned lichen

orange bellied fringe lichen

[halljavalge]

Source: Maren Toom photo - harilik hallsamblik. Grey lichen Heterodermia in the pine forest, Estonia.

ℍ𝐚𝓵ｌ נ𝐀 𝔳คĻǤẸ