Polygonum minimum S. Watson
leafy dwarf knotweed (broadleaf knotweed)
Polygonaceae (Buckwheat family)
Introduction to Vascular Plants
leafy dwarf knotweed (broadleaf knotweed)
Polygonaceae (Buckwheat family)
Introduction to Vascular Plants
Species Information
General:
Annual herb from a taproot; stems ascending to erect, several, branched, 3-15 cm tall, reddish, round in cross-section, grooved.
Leaves:
Basal leaves lacking; stem leaves alternate, elliptic to more or less round, the blades 5-25 mm long, the stalks very short or lacking; stipules translucent, 2-4 mm long, ragged.
Flowers:
Inflorescence of 2-3 flowers in axillary clusters; perianths 1.5-2 mm long, green with pinkish margins, 5-lobed about 2/3 the distance to the base.
Fruits:
Achenes, 3-angled, greenish-black, smooth, shiny, 2-2.5 mm long. barely exceeding the perianths.
Illustration
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
Ecology
Ecological Framework for Polygonum minimum
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)
| Site Information |
Value / Class |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
466 | 5 | 1858 |
| Slope
Gradient (%) |
38 | 1 | 84 |
|
Aspect (degrees) |
206 | 60 | 335 |
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
3 | 0 | 7 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
43 | ||
| Modal
BEC Zone Class |
CWH | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
CWH(31), ESSF(7), ICH(3), PP(1) | ||
|
Source:
Klinkenberg 2013
|
|||