Isoetes melanopoda Gay & Durieu ex Durieu ssp. melanopoda . Blackfoot Quillwort. Phen: May-Sep. Hab: Floodplains. Dist: S. IN, IL, and MO south to ne. LA; probably represented eastward to c. TN and s. MS (the available material ambiguous) (Brunton & Britton 2006).

Origin/Endemic status: Native

Taxonomy Comments: A diploid species (2n=22). (Brunton & Britton 2006). This taxon should be treated at species rank relative to I. melanopoda ssp. silvatica, based on the polyphyly of Isoetes melanopoda s.l. (Schafran et al. 2018).

Synonymy: = K3, K4, Tn, TxFerns; < Isoetes melanopoda Gay & Durieu ex Durieu – AqW, Ar, C, ETx1, FNA2, G, GrPl, Il, K1, Mo1, S13, Tx, Musselman (2001)

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Wetland Indicator Status:

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

Heliophily: 5