section
Polygonum
Polygonum
Children
- Small Knotweed present
- Bushy Knotweed native
- Leathery Knotweed native
- Sea Knotweed native
- Small's Knotweed native
- Ray's Knotweed
- Red-knotgrass
- Persian Knotweed introduced
- Fowler's Knotweed native
- Erect Knotweed native
- Marin Knotweed native
- Sharp-fruited Knotweed
- Texas Knotweed native
- Common Knotgrass Complex
Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Top native Polygonum All
Native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.
-
Bushy Knotweed
Polygonum ramosissimum
caterpillars
32
food
46
flowers
16
-
Leathery Knotweed
Polygonum achoreum
caterpillars
31
food
42
flowers
14
-
Small's Knotweed
Polygonum buxiforme
caterpillars
28
food
40
flowers
16
-
Sea Knotweed
Polygonum glaucum
caterpillars
27
food
36
flowers
15
-
Erect Knotweed
Polygonum erectum
caterpillars
25
food
36
flowers
11
-
Fowler's Knotweed
Polygonum fowleri
caterpillars
15
food
33
flowers
5
-
Marin Knotweed
Polygonum marinense
caterpillars
11
food
34
flowers
3
-
Texas Knotweed
Polygonum striatulum