Triadenum tubulosum
| Scientific Name: | Triadenum tubulosum |
| Synonym: | |
| Family: | Hypericaceae |
| Common Name: | Marsh St. John's Wort |
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| C Value: | 8 |
| Wetness: | OBL |
| # of Species in Genus in Illinois: | 4 |
| Duration: | Perennial |
| Reproduction: | Dioecious |
| Flower Type: | Perfect |
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| Flower Color: | Red |
| Growth Habit: | Forb |
| Leaf Arrangement: | Opposite |
| Leaf Type: | Simple |
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| Leaf Margin: | Entire |
| Leaf Toothing: | Entire |
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| Distribution: | BONAP Distribution Map |
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| More Info: | Illinois Wildflowers Search |