Top native Polygonum
8 species, native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.
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Bushy Knotweed
Polygonum ramosissimum
caterpillars
32
food
46
flowers
16
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Leathery Knotweed
Polygonum achoreum
caterpillars
31
food
42
flowers
14
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Small's Knotweed
Polygonum buxiforme
caterpillars
28
food
40
flowers
16
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Sea Knotweed
Polygonum glaucum
caterpillars
27
food
36
flowers
15
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Erect Knotweed
Polygonum erectum
caterpillars
25
food
36
flowers
11
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Fowler's Knotweed
Polygonum fowleri
caterpillars
15
food
33
flowers
5
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Marin Knotweed
Polygonum marinense
caterpillars
11
food
34
flowers
3
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Texas Knotweed
Polygonum striatulum