#psora

[lichenaday]

Psora crystallifera

Yes, this is a real lichen. And no, I don't believe it either. P. crystallifera is a squamulose lichens that grows on dry soil in arid regions of Australia, New Zealand, and southern Africa. It has small, crumpled lobes that are 1-10 mm in diameter, which grow in extensive colonies intermingled with other biological soil crust forming organisms. The squamules are mostly dull grayish-brown, but can appear more green when hydrated. The upper cortex is textured like a turtle shell, divided into thickened, crystal-like, polyhedrons. Besides the fact that this makes the lichen look bedazzled and super rad, this growth form serves an important purpose: it helps to diffuse direct sunlight, reducing solar radiation damage while still allowing less direct light to reach the photobiont layer for photosynthesis! Isn't that incredible??? Evolution is so fucking brilliant man, I can't even believe it some times. Just one of the many ways lichens have adapted to some of the harshest environments on earth.

images: source

info: source | source

[anthropocenesketchbook]

I’m hoping to be able to take a more informed look at how lichens are doing in Stebbins Cold Canyon after the fire three years ago. To that end, I’ve started drawing some lichens commonly found in chaparral from photo references. The second page shows my drawings of some basic lichen anatomy. #lichen #chaparral #sciart #oakmosslichen #everniaprunastri #sunburstlichen #xanthomendoza #rosettelichen #physcia #soilpaintlichen #acarosporaschleicheri #scalelichen #psora #rockolivelichen #peltula https://www.instagram.com/p/BtO0eVhAXR7/?utm_source=ig_tumblr_share&igshid=1lcqbdbzhxoah

[lichenaday]

Psora luridella

images: source | source

[lichenaday]

Psora cerebriformis

Brain scale lichen

This squamulose lichen has a thallus made up of cracked, rounded, 8 mm wide scales which grow in tight patches over patches of soil in desert regions of western North America. These lichens do what a lot of terricolous lichens do really well, and that is to hold soil in place and prevent erosion. When the soil around them erodes away, it often leaves behind domed patches covered in wrinkled scales which look surprisingly brain-like. The upper surface of these scales is gray to olive in color, and often covered in a thick layer of chalky, whitish-gray pruina. The lower surface is typically pale brown to white. P. cerebriformis produces bulbous, black apothecia along the margins of the scales, though they are often obscured by pruina and blend in with the rest of the upper surface.

images: source | source | source

info: source

[lichenaday]

Psora vallesiaca

Fishscale lichen

I have been MIA lately due to travel and then a resulting COVID infection that has knocked me on my ass for the past week. Forgive for my absence, and as recompence, accept this squamulose, terricolous lichen native to northern Africa, Europe, Greenland, and northern North America. Isn't he adorable? P. vallesiaca is olive-green to red-brown in color, with black apothecia and white margins, and can be found on base-rich soils and in the cracks of calcareous rock.

images: source | source

info: source | source

[lichenaday]

Psora crenata

Brick scale lichen

Big Lichen out there wants you to think that P. crenata looks like bricks or scales, but we all can clearly see that this boy is nothing but a mass of melted mini marshmallows, right? I have never wanted to to put a lichen in my mouth so bad. This squamulose lichen grows in scattered or adjacent patches made up of concave, rounded scales. The cracked upper surface is matte orange, red, or pink in color, but is often dusted in or coated with white, chalky pruina which obscures the true color. The margins of the scales are dotted with dark-brown to black apothecia, often also covered in pruina. P. crenata grows on open, arid soil in dry habitats, and has been found in Africa, Australia, and North America. And I want to make it clear that I respect his autonomy enough to not eat him . . . but I am thinking about it.

images: source | source | source

info: source | source

[photo-biont]

[yagmurweb]

Evlilik ve Miazmalar (Kronik Hastalıklar)

Pek çok düğüne katılmış biri olarak  (özellikle de bu yıl) yeni evlenen bu güzel dostlar ve tümü için evliliğin önemi ve miazmalar (kronik hastalıklar) hakkında bir şeyler paylaşayım dedim. Neden miazmalar (kronik hastalıklar) evlilikte bu kadar önemli? Birçok insan muhtemelen “miasma” terimini ilk defa duyuyor (bu konuyu başka bir blog yazımda özellikle ele alacağım). Dr. Hahnemann miasma…

View On WordPress