Brook Floater vs cloud grass

Alasmidonta varicosa compared with Agrostis nebulosa

Key Differences

• Brook Floater is Vulnerable while cloud grass is Not Evaluated.

Taxonomic Classification

Rank	Brook Floater	cloud grass
Kingdom	Animalia (Animals)	Plantae (plantas)
Phylum	Mollusca (Moluscos)	Magnoliophyta (Flowering Plants)
Class	Bivalvia (Bivalvia)	Liliopsida (Monocots)
Order	Unionida (Unionoida)	Poales (Grasses)
Family	Unionidae	Poaceae (Grass Family)
Genus	Alasmidonta	Agrostis
Species	Alasmidonta varicosa	Agrostis nebulosa

Conservation Status

Brook Floater

VU — Vulnerable

cloud grass

NE — Not Evaluated

Physical Characteristics

Attribute	Brook Floater	cloud grass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Floater

Habitat

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

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

cloud grass

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Found across Europe (8 countries).

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.

cloud grass

Cloud grass refers to ornamental and native grasses in the genus Agrostis (family Poaceae), particularly Agrostis nebulosa, a delicate annual grass native to the Iberian Peninsula and northwestern Africa that produces large, airy, cloud-like panicles of minute spikelets on extremely fine, hair-like branches. The panicle's ethereal, misty appearance in mass gives the plant its evocative common name. It grows in dry, sandy soils and disturbed ground, completing its life cycle quickly in spring before summer drought conditions. Agrostis nebulosa is widely cultivated as an ornamental grass for cut flower arrangements and dried flower compositions, where its delicate panicles add texture and movement to floral displays. The genus Agrostis, bent grasses, encompasses dozens of perennial and annual species distributed across cool temperate and alpine zones worldwide, including the fine-leaved bent grasses used in golf greens and lawns for their dense, low-growing turf. Many Agrostis species are characteristic of acidic, nutrient-poor soils in heathlands, moorlands, and montane grasslands across Europe and North America.