Brown Cobblestone Lichen vs Coast Barrel Cactus

Acarospora fuscata compared with Ferocactus viridescens

Taxonomic Classification

Rank	Brown Cobblestone Lichen	Coast Barrel Cactus
Kingdom	Fungi (Fungi)	Plantae (Plants)
Phylum	Ascomycota (Sac Fungi)	Magnoliophyta (Flowering Plants)
Class	Lecanoromycetes (Lecanoromycetes)	Magnoliopsida (Dicots)
Order	Acarosporales (Acarosporales)	Caryophyllales (Caryophyllales)
Family	Acarosporaceae	Cactaceae
Genus	Acarospora	Ferocactus
Species	Acarospora fuscata	Ferocactus viridescens

Conservation Status

Brown Cobblestone Lichen

LC — Least Concern

Coast Barrel Cactus

LC — Least Concern

Physical Characteristics

Attribute	Brown Cobblestone Lichen	Coast Barrel Cactus
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Cobblestone Lichen

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, Portugal, and United States.

Coast Barrel Cactus

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Brown Cobblestone Lichen

The Brown Cobblestone Lichen (Acarospora fuscata) is a species in the genus Acarospora. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Coast Barrel Cactus

Coast barrel cactus (Ferocactus viridescens) is a stout, ribbed cactus in the family Cactaceae, native to coastal sage scrub and chaparral communities of extreme southern California and northern Baja California, Mexico. It grows on rocky slopes, canyon walls, and coastal bluffs within a few kilometres of the Pacific coast, favouring thin soils and south- or west-facing exposures. This barrel cactus reaches up to 1 metre in height and diameter, bearing dense clusters of stout red or pink spines and yellow to greenish-yellow flowers that bloom in late spring and summer. Fruits are yellow and edible when ripe, historically used as food by Indigenous Kumeyaay people. The coast barrel cactus is threatened by illegal collection for the horticultural trade, urban sprawl around San Diego, and invasive grasses that increase fire frequency in chaparral. It is assessed as Least Concern by the IUCN, but populations in California are considered vulnerable due to limited range. The species is legally protected under the California Endangered Species Act and the Convention on International Trade in Endangered Species (CITES).