Blackboard Tree vs Rootless Duckweed

Alstonia scholaris compared with Wolffia arrhiza

Key Differences

• Blackboard Tree is Least Concern while Rootless Duckweed is Endangered.

Taxonomic Classification

Rank	Blackboard Tree	Rootless Duckweed
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class	Magnoliopsida (Dicots)	Liliopsida (Monocots)
Order	Gentianales (Gentianales)	Alismatales (Alismatales)
Family	Apocynaceae	Araceae
Genus	Alstonia	Wolffia
Species	Alstonia scholaris	Wolffia arrhiza

Evolutionary Relationship

Blackboard Tree and Rootless Duckweed share a common ancestor at the Phylum level: Magnoliophyta. (Flowering Plants)

Conservation Status

Blackboard Tree

LC — Least Concern

Rootless Duckweed

EN — Endangered

Physical Characteristics

Attribute	Blackboard Tree	Rootless Duckweed
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.

Rootless Duckweed

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, temperate broadleaf and mixed forests, and temperate coniferous forests, among 4 distinct biome types spanning the Indomalayan and Oceanian and Palearctic realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Japan), Europe (10 countries), North America (Canada), and South America (Brazil). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.