Alder vs Common Crabgrass

Alnus glutinosa compared with Digitaria ciliaris

Key Differences

• Alder is Least Concern while Common Crabgrass is Not Evaluated.

Taxonomic Classification

Rank	Alder	Common Crabgrass
Kingdom same	Plantae (植物)	Plantae (植物)
Phylum same	Magnoliophyta (被子植物門)	Magnoliophyta (被子植物門)
Class	Magnoliopsida (モクレン綱)	Liliopsida (単子葉植物綱)
Order	Fagales (ブナ目)	Poales (イネ目)
Family	Betulaceae	Poaceae (Grass Family)
Genus	Alnus	Digitaria
Species	Alnus glutinosa	Digitaria ciliaris

Evolutionary Relationship

Alder and Common Crabgrass share a common ancestor at the Phylum level: Magnoliophyta. (被子植物門)

Conservation Status

Alder

LC — Least Concern

Common Crabgrass

NE — Not Evaluated

Physical Characteristics

Attribute	Alder	Common Crabgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alder

Habitat

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

Range

Widely distributed across Africa (South Africa), Asia (India, Japan), Europe (6 countries), North America (Canada, United States), Oceania and the Pacific (Australia, New Zealand), and South America (Chile).

Common Crabgrass

Habitat

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

Range

Widely distributed across Africa (8 countries), Asia (8 countries), Europe (18 countries), North America (10 countries), Oceania and the Pacific (12 countries), and South America (5 countries).

Alder

The Alder (Alnus glutinosa) is a species in the genus Alnus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Common Crabgrass

<em>Digitaria ciliaris</em>, commonly known as common crabgrass or southern crabgrass, is an annual grass in the family Poaceae. It has a near-cosmopolitan distribution, occurring across tropical, subtropical, and warm temperate regions on multiple continents. This species typically colonizes disturbed habitats including lawns, gardens, roadsides, cultivated fields, and waste ground, making it one of the most widespread grass weeds in the world. Common crabgrass spreads rapidly via its sprawling, branching stems that root at the nodes when they contact moist soil. It produces slender, finger-like racemes bearing small, paired spikelets. The species thrives in warm weather and full sun, declining with the onset of cooler autumn temperatures. While it is considered a troublesome weed in many agricultural and horticultural contexts, it also provides ground cover and food for various seed-eating birds. Biological traits of this species remain poorly documented in the scientific literature.

Shared Countries

Both species can be found in 8 countries:

🇦🇺 Australia 🇧🇪 Belgium 🇨🇱 Chile 🇩🇰 Denmark 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden 🇺🇸 United States