Physostegia leptophylla Small. Tidal Marsh Obedient-plant, Swamp Obedient-plant. Phen: Late May-early Aug; Jun-Sep. Hab: Bottomland hardwood forests, swamps, tidal freshwater or slightly brackish (oligohaline) marshes, rarely wet savannas (GA). Dist: Se. VA south to sc. peninsular FL, west to sw. GA., s. AL, and Panhandle FL.

Origin/Endemic status: Endemic

Taxonomy Comments: P. leptophylla is a tetraploid; Cantino (1982) suggests that this species may be an allotetraploid, perhaps originating from P. purpurea × virginiana.

Synonymy: = C, Fl6, GW2, K1, K3, K4, WH3, Cantino (1982); > Dracocephalum leptophyllum Small – S; < Dracocephalum purpureum (Walter) E.M.McClint. ex Gleason – G, RAB; > Dracocephalum veroniciformis Small – S; > Physostegia aboriginorum Fernald – F; > Physostegia denticulata (Aiton) Britton – F, misapplied

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL

Heliophily: 5