Helanthium tenellum (Martius ex Schultes f.) Britton. Mud-babies, Dwarf-burhead. Phen: Aug-Sep. Hab: On drawdown zones of Coastal Plain ponds, pineland ponds, pondcypress savannas in clay-based Carolina bays, blackwater riverbanks, or ponds in the Mountains with Coastal Plain affinities (Augusta County, VA); also apparently adventive on drawdown zones of artificial impoundments (Lake Chatuge, sw. NC and n. GA). Dist: MA west to MI and KS, south to c. peninsular FL and s. TX, but widely scattered and disjunct in that range; also Mexico (CHP, GRO, VER). See Belden et al. (2004) for a discussion of the species in Virginia.
Origin/Endemic status: Native
Synonymy: = K3, K4, NE, NY, Lehtonen & Myllys (2008); = Echinodorus tenellus (Mart. ex Schult.f.) Buchenau – AqW, ETx1, F, FNA22, Il, K1, Meso6, Mi, Va, WH3; = Echinodorus tenellus (Mart. ex Schult.f.) Buchenau var. tenellus; = n/a – RAB; > Echinodorus parvulus Engelm. – G, GrPl, GW1, Tx; > Echinodorus tenellus (Mart. ex Schult.f.) Buchenau var. parvulus (Engelm.) Fassett – C, Mo1; > Helanthium parvulum (Engelm.) Britton – S, Tat; > Helianthium parvulum (Engelm.) Small – S13
Wetland Indicator Status:
Heliophily: 9
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