Common Marsh Buckwheat
Polygonum glabrum
Also known as Denseflower Knotweed
- Habit
- Herb
- Found in India
- Uttarakhand, Himachal Pradesh, Tamil Nadu & more
- Flowering
- August-April
How to identify Common Marsh Buckwheat
Identify Common Marsh Buckwheat by combining habit, leaf characters, flower or fruit details, location, and its family pattern. Do not rely on one feature alone.
- Look for a herb habit.
- Check the distinctive field mark: Grows in marshy wet ground.
- Confirm leaf shape: Lanceolate (long, narrow, tapering to a point).
- In season, compare flowering and fruiting time: August-April.
- In India, compare location records such as Uttarakhand, Himachal Pradesh, Tamil Nadu, Meghalaya and nearby regions.
- Confirm it sits within the Polygonaceae family pattern, then compare close relatives before deciding it is Common Marsh Buckwheat.
Plant Details
- Scientific name
- Polygonum glabrum
- Genus
- Polygonum
- Family
- Polygonaceae
- Habit
- Herb
- Distribution
- Cosmopolitan
- Found in India
- Uttarakhand, Himachal Pradesh, Tamil Nadu, Meghalaya, Arunachal Pradesh, Assam, West Bengal, Maharashtra, Sikkim, Kerala, Karnataka, Jammu & Kashmir, Nagaland, Manipur, Rajasthan, Punjab, Mizoram, Ladakh, Jharkhand, Chhattisgarh, Delhi, Uttar Pradesh, Bihar, Gujarat, Madhya Pradesh, Telangana, Andaman & Nicobar Islands, Haryana, Tripura
- Flowering & fruiting
- August-April
- Conservation status
- Least Concern (LC)
Leaf characters
- Leaf shape
- Lanceolate (long, narrow, tapering to a point)recorded
Typical of the family
- Arrangement
- Alternate
Characters marked “recorded” are for Common Marsh Buckwheat itself; the rest are typical of the Polygonaceae family.
Flower & fruit characters
- Flower symmetry
- Actinomorphic (radially symmetrical)
- Inflorescence
- Spike
- Fruit
- Achene
Typical of the Polygonaceae family — flowering plants only; individual species can differ.
Local Names
- Bengali
- পানি মরিচ
About Common Marsh Buckwheat
A member of the Polygonaceae family, Common Marsh Buckwheat (Polygonum glabrum) is a herb. In India it has been recorded in Uttarakhand, Himachal Pradesh, Tamil Nadu and 26 other states. Flowering and fruiting run from August to April.
Polygonaceae
Buckwheat/Knotweed family
Common Marsh Buckwheat belongs to the Polygonaceae family.
The illustration represents the family — not necessarily this exact species.
Explore the Polygonaceae familySnap it. Know it.
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Common plant problems
If you are starting from symptoms instead of a diagnosis, use the plant disease symptom checker to narrow the cause before treating.
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