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Common Reed🌾
Phragmites australis
ヨシ（アシ）
A large perennial grass that forms dense colonies along rivers, lakes, and wetland margins. Reaches 1-3 m in height and produces brown plumes in autumn. Distributed worldwide, it is used for thatched roofing and water purification. Also known as common reed.
Identification Points
- ✓Large grass forming extensive colonies along waterways
- ✓Stems are hollow and sturdy
- ✓Leaves are broad and long (2-3 cm wide)
- ✓Produces fluffy brown plumes in autumn
Habitat
Riverbanks, lakeshores, wetlands, waterside areas
Season
August to October (plumes)
Morphological TraitsAI-estimated, needs verification
Leaf arrangement
Alternate
Leaf type
Simple
Venation
Parallel
Leaf margin
Entire
Leaf shape
Linear
Growth form
Herb
Petal fusion
No petals
Habitat
Wetland
Leaf dissection
Undivided
Ovary position
Superior
Phylogenetic Positionイネ科 →
Phylogenetic Position
Angiosperms > Monocots > Commelinids > Poales > Poaceae
Divergence Era
Late Cretaceous to Paleogene (approx. 80–70 million years ago)
Sources & References
AI-generated, needs verification