Blackboard Tree vs Brown Knapweed

Alstonia scholaris compared with Centaurea jacea

Taxonomic Classification

Rank	Blackboard Tree	Brown Knapweed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Gentianales (Gentianales)	Asterales (Daisies & Sunflowers)
Family	Apocynaceae	Asteraceae (Daisy Family)
Genus	Alstonia	Centaurea
Species	Alstonia scholaris	Centaurea jacea

Evolutionary Relationship

Blackboard Tree and Brown Knapweed share a common ancestor at the Class level: Magnoliopsida. (Dicots)

View Class: Magnoliopsida

Conservation Status

Blackboard Tree

LC — Least Concern

Brown Knapweed

LC — Least Concern

Physical Characteristics

Attribute	Blackboard Tree	Brown Knapweed
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackboard Tree

Habitat

Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.

Range

Distributed across Micronesia, Taiwan, and United States.

Brown Knapweed

Habitat

Inhabits deserts and xeric shrublands within the Palearctic biogeographic realm.

Range

Widely distributed across Asia (Japan, Tajikistan), Europe (9 countries), North America (Canada, United States), Oceania and the Pacific (Australia), and South America (Argentina, Chile).

Blackboard Tree

The Blackboard Tree (Alstonia scholaris) is a species in the genus Alstonia. It is currently classified as Least Concern on the IUCN Red List. Inhabits tropical and subtropical moist broadleaf forests and tropical and subtropical dry broadleaf forests within the Oceanian biogeographic realm.

Brown Knapweed

The Brown Knapweed (Centaurea jacea) is a species in the genus Centaurea. It is currently classified as Least Concern on the IUCN Red List. Inhabits deserts and xeric shrublands within the Palearctic biogeographic realm.