Coast Sandbur vs Flaccid grass

Cenchrus spinifex compared with Cenchrus flaccidus

Key Differences

• Coast Sandbur is Not Evaluated while Flaccid grass is Least Concern.

Taxonomic Classification

Rank	Coast Sandbur	Flaccid grass
Kingdom same	Plantae (tumbuhan)	Plantae (tumbuhan)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Liliopsida (Monocots)	Liliopsida (Monocots)
Order same	Poales (Grasses)	Poales (Grasses)
Family same	Poaceae (Grass Family)	Poaceae (Grass Family)
Genus same	Cenchrus	Cenchrus
Species	Cenchrus spinifex	Cenchrus flaccidus

Evolutionary Relationship

Coast Sandbur and Flaccid grass share a common ancestor at the Genus level: Cenchrus.

Conservation Status

Coast Sandbur

NE — Not Evaluated

Flaccid grass

LC — Least Concern

Physical Characteristics

Attribute	Coast Sandbur	Flaccid grass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coast Sandbur

Habitat

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

Range

Widely distributed across Africa (Libya, South Africa), Asia (Turkey), Europe (Greece, Norway, Romania), North America (United States), and South America (Brazil, Colombia).

Flaccid grass

Habitat

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

Range

Distributed across Belgium and France.

Coast Sandbur

Coast sandbur (Cenchrus spinifex) is an annual or short-lived perennial grass in the family Poaceae, native to warm coastal regions of the Americas but now widespread as a weed throughout tropical and subtropical regions worldwide, including Africa, Australia, and parts of Asia. It grows on coastal dunes, sandy beaches, roadsides, disturbed ground, and the margins of agricultural land. The genus Cenchrus is notable for producing sharp, bur-like seed clusters enclosed in rigid, spine-tipped involucres that readily attach to animal fur, clothing, and footwear for dispersal—a highly effective mechanism for long-distance spread. Coast sandbur is considered a nuisance weed in recreational and agricultural settings due to its painful burs. It is tolerant of salt, drought, and nutrient-poor substrates, making it a successful coloniser of disturbed coastal environments. The IUCN conservation status is Not Evaluated. While not threatened in any way, coast sandbur presents challenges in areas where it has naturalised, competing with native beach and dune vegetation.