Arthrocaulon macrostachyum
- kingdom: Plantae
- phylum: Tracheophyta
- class: Magnoliopsida
- order: Caryophyllales
- family: Amaranthaceae
- genus: Arthrocaulon
- species: Arthrocaulon macrostachyum
- Colwood
- Ladner
- North Saanich
- Parksville
British Columbia
Canada- Saint-Louis
Saint-Louis
Senegal