Apocynum sibiricum Jacquin. Clasping-leaved Dogbane. Phen: Jul-Sep; Sep-Oct. Hab: Forests, woodlands, riverside scour areas, roadsides, pastures. Dist: NL (Newfoundland) and BC south to e. VA, w. VA, WV, and MO; ne. Asia. A. sibiricum var. cordigerum has been found in Kent County, MD (Steury, Tyndall, & Cooley 1996).

Origin/Endemic status: Native

Synonymy: = C, Va, W; = Apocynum cannabinum L. var. hypericifolium A.Gray – Mi; < Apocynum cannabinum L. – FNA14, GrPl, K1, K3, K4, Mo2, NcTx, Pa; > Apocynum hypericifolium Aiton var. cordigerum (Greene) Bég. & Belosersky – Woodson (1930); > Apocynum hypericifolium Aiton var. hypericifolium – Tat, Woodson (1930); > Apocynum sibiricum Jacq. var. cordigerum (Greene) Fernald – F, G, Il, Tx; > Apocynum sibiricum Jacq. var. salignum (Greene) Fernald – Tx; > Apocynum sibiricum Jacq. var. sarniense (Greene) Woodson – Tat; > Apocynum sibiricum Jacq. var. sibiricum – F, G, Il, Tat

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FACU (taxonomic split from wetland indicator species)
• Great Plains: FAC (taxonomic split from wetland indicator species)
• Midwest: FAC (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily: 8