Top native hypericum sect. elodea
4 species, native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.
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Greater Marsh St. John's-wort
Hypericum walteri
caterpillars
5
hosts
1
food
3
flowers
23
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Virginia Marsh St. John's-wort
Hypericum virginicum
caterpillars
5
food
3
flowers
45
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Fraser's Marsh St. John's-wort
Hypericum fraseri
caterpillars
5
food
3
flowers
31
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Southern Marsh St. John's Wort
Hypericum tubulosum
caterpillars
2
food
2
flowers
14