section
Knotgrass
Duravia
Children
- Beach Knotweed native
- Douglas' Knotweed native
- Slender Knotweed native
- Milkwort Knotweed native
- Shasta Knotweed native
- Scatter Knotweed native
- Broadleaf Knotweed native
- Bidwell's Knotweed native
- Sawatch Knotweed native
- Wiry Knotweed native
- California Knotweed native
- Bolander's Knotweed native
- Nuttall's Knotweed native
- Parry's Knotweed native
- Mrs. Austin's Knotweed native
- Engelmann's Knotweed
- Utah Knotweed native
- Cascade Knotweed native
- Scotts Valley Polygonum
- Polygonum heterosepalum native
Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Top native knotgrass All
Native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.
-
Douglas' Knotweed
Polygonum douglasii
caterpillars
35
food
44
flowers
14
-
Milkwort Knotweed
Polygonum polygaloides
caterpillars
28
food
39
flowers
13
-
Slender Knotweed
Polygonum tenue
caterpillars
27
food
41
flowers
16
-
Broadleaf Knotweed
Polygonum minimum
caterpillars
20
food
38
flowers
6
-
Scatter Knotweed
Polygonum spergulariiforme
caterpillars
18
food
35
flowers
5
-
Beach Knotweed
Polygonum paronychia
caterpillars
17
food
34
flowers
5
-
Wiry Knotweed
Polygonum majus
caterpillars
17
food
34
flowers
5
-
Nuttall's Knotweed
Polygonum nuttallii
caterpillars
16
food
33
flowers
5
-
Sawatch Knotweed
Polygonum sawatchense
caterpillars
15
food
38
flowers
3
-
Bolander's Knotweed
Polygonum bolanderi
caterpillars
14
food
34
flowers
3
-
Shasta Knotweed
Polygonum shastense
caterpillars
14
food
33
flowers
5
-
California Knotweed
Polygonum californicum
caterpillars
14
food
33
flowers
3
-
Cascade Knotweed
Polygonum cascadense
caterpillars
14
food
32
flowers
3
-
Parry's Knotweed
Polygonum parryi
caterpillars
13
food
33
flowers
3
-
Bidwell's Knotweed
Polygonum bidwelliae
caterpillars
12
food
32
flowers
3