Triadenum tubulosum (Walter) Gleason. Southern Marsh St. John's-wort. Phen: Aug-Sep. Hab: Bogs, peaty wetlands, drawdown sloughs along rivers, drawdown shorelines along man-made reservoirs. Dist: Se. VA south to Panhandle FL, west to LA, and north in the interior to se. and c. TN, s. IL and s. OH.

Origin/Endemic status: Native

Synonymy: = Ar, C, Fl2, FNA6, G, GW2, Il, K1, Mo2, Tn, WH3, Adams (1973); = Hypericum tubulosum Walter – K3, K4, RAB, Tx, Va; = Hypericum tubulosum Walter var. tubulosum – F; = Triadenum longifolium Small – S, S13

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL (name change)
• Eastern Mountains and Piedmont: OBL (name change)
• Great Plains: OBL (name change)
• Midwest: OBL (name change)
• Northcentral & Northeast: OBL (name change)

Heliophily: 5