Black-stemmed Goldendrop vs Coast Myall

Onosma nigricaulis compared with Acacia binervia

Key Differences

• Black-stemmed Goldendrop is Critically Endangered while Coast Myall is Least Concern.

Taxonomic Classification

Rank	Black-stemmed Goldendrop	Coast Myall
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Boraginales (Boraginales)	Fabales (Legumes & Allies)
Family	Boraginaceae	Fabaceae
Genus	Onosma	Acacia
Species	Onosma nigricaulis	Acacia binervia

Evolutionary Relationship

Black-stemmed Goldendrop and Coast Myall share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Black-stemmed Goldendrop

CR — Critically Endangered

Coast Myall

LC — Least Concern

Physical Characteristics

Attribute	Black-stemmed Goldendrop	Coast Myall
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-stemmed Goldendrop

Habitat

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

Coast Myall

Habitat

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

Black-stemmed Goldendrop

The Black-stemmed Goldendrop (Onosma nigricaulis) is a species in the genus Onosma. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Coast Myall

Coast myall (Acacia binervia) is a small to medium tree or tall shrub in the family Fabaceae, native to coastal and near-coastal regions of New South Wales and Queensland in eastern Australia. It grows in coastal heath, dry sclerophyll woodland, and scrubby vegetation on sandy or rocky substrates, often in association with banksias and eucalypts. Like most Australian wattles, coast myall produces phyllodes—flattened leaf-stalks functioning as leaves—rather than true compound leaves in mature plants. The dark green phyllodes are distinctive, with two main veins, giving rise to the species name binervia. Golden-yellow, spherical flower heads are produced in winter to spring, attracting native bees. The genus Acacia sensu lato encompasses hundreds of species across Australia and globally, many of which play important ecological roles in nitrogen cycling through root symbioses. Coast myall is assessed as Least Concern by the IUCN. It is sometimes planted in coastal revegetation projects for its tolerance of poor, sandy soils, drought, and salt-laden winds.