Last month I brought home a piece of bark with a good growth of leafy lichen and left it on a table outside my door. Yesterday I brought it in to look at it in detail.
|Hyphenated ribbon, Ramalina farinacea|
It's hard to really see these lichens; each lobe branches and twists and entwines itself among the others. The eyes rebel. But this time, I noticed the round buttons; what are they?
Soredia are powdery propagules composed of fungal hyphae wrapped around cyanobacteria or green algae. These can be either scattered diffusely across the surface of the lichen's thallus, or produced in localized structures called soralia. (Wikipedia)
|Two soralia on a lobe.|
The Latin name, farinacea, means "floury", referring to the texture of the top of these structures.
|Another one. The white blobs are also reproductive structures.|
|One more. It stands up like a cake plate from the green thallus.|
Talo fruticuloso de color gris verdoso formado por lacinias colgantes estrechas, acintadas y provistas de numerosos soralios ovales en los márgenes, que nacen todas de un único punto de fijación al sustrato. (Descripción por Miguel Varona, "Cuaderno")