How do Crustose foliose and fruticose lichens differ from one another?
How do Crustose foliose and fruticose lichens differ from one another?
Fruticose lichens have one cortex encircling the “branches”, even when the branches are flattened and look like “leaves”. Foliose lichens have a separate upper cortex and lower cortex on each side of the “leaf”. Crustose and squamulose lichens have an upper cortex, but do not have a lower cortex.
Which lichen is foliose?
The foliose (leaf-like) lichens are the most common types that grow on the trunks of trees or on rocks in the shady woods. They’re usually gray-green and form more or less circular colonies. The glamorous lichens are the fruticose (shrub-like) lichens that grow more or less like real plants.
What is common name for fruticose lichens?
Fruticose Lichens. The pendent fruticose lichen called California Spanish moss (Ramalina menziesii) hanging from the branches of a valley oak (Quercus lobata) in the Coast Ranges of central California.
Is lichen a Crustose?
Complete Answer: – Crustose lichens are the lichens that form a crust which strongly adhere to the substrate (soil, rock, tree bark ). – In some lichens the crust may be thick and lumpy. The medulla – The medulla fastens the lichen to the substrate and is made up of fungal hyphae.
What causes lichen to grow?
It gets all of the nutrients it needs from rain and the surrounding air. Lichen is usually the first type of organism to appear after a natural disaster, such as a fire. It can survive when plants can’t and can grow on rough surfaces like rocks or old fences.
Should you remove lichen from trees?
There’s absolutely no need to remove lichen from a tree. In fact, removing it can do more harm than good. You may injure the bark by trying to remove the lichen, ultimately causing damage to the tree and providing entryways for diseases and pests.
What kind of lichen has an erect foliose?
Cetraria laevigata (sun form; erect foliose). Photo by Ralph Pope. Cetraria laevigata (erect foliose). Photo by Ralph Pope. Flavocetraria cucullata (detail). Photo by Ralph Pope. Flavocetraria cucullata. Photo by Ralph Pope. Gymnoderma lineare (squamulose).
Where are foliose lichens found in San Diego?
A foliose, rosette-forming rock lichen with delicate dissected lobes. The thallus is whitish-gray compared with the yellowish-green Xanthoparmelia. This species appears to be fairly common on Palomar Mountain in San Diego County. Parmotrema stuppeum. A foliose bark lichen on oaks of the Central Californa Coast Ranges.
What kind of lichen is orange with rhizines?
Xanthoria polycarpa, an orange foliose lichen on the bark of a black oak (Quercus kelloggii). Unlike the orange, crustose Caloplaca, this is truly a foliose lichen with sparse rhizines on the lower surfaces of the thallus lobes. The apothecia are similar to those of Caloplaca.
What kind of tree has fruiticose bark lichen?
Left: A white fir ( Abies concolor) in the Sierra Nevada of California. The trunk is covered with the chartreuse, fruiticose bark lichen Letharia vulpina.