Sagittaria engelmanniana J.G. Smith. clade: Sagittifolia Group. Common name: Blackwater Arrowhead, Engelmann's Arrowhead. Phenology: Jun-Oct. Habitat: Blackwater streambanks, sphagnum bogs, pocosins, beaver ponds. Distribution: MA and NY south to s. FL and s. AL, primarily on the Coastal Plain (rarely disjunct inland).
Origin/Endemic status: Native
Synonymy ⓘ: = AqW, C, F, FNA22, K1, K3, K4, NE, NY, RAB, Tat, Va, W, Beal, Wooten, & Kaul (1982), Keener (2005); = n/a – Pa; = Sagittaria engelmanniana J.G.Sm. ssp. engelmanniana – G, GW1, Bogin (1955); < Sagittaria australis (J.G.Sm.) Small – WH3; < Sagittaria longirostra – S, S13
Links to other floras: = Sagittaria engelmanniana - FNA22
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: OBL
- Eastern Mountains and Piedmont: OBL
- Northcentral & Northeast: OBL
Heliophily ⓘ: 7
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Horticultural Information
Intro: Erect, aquatic perennial of blackwater stream banks, sphagnum bogs, pocosins, beaver ponds.
Stems: Flowering stem (scape) and leaves arise from an underground stem.
Leaves: Leaves clustered basally and held above water surface on long petioles that may be 2-ridged; narrowly arrowhead-shaped with long, nearly linear basal lobes; 4-8 in. long; smooth.
Inforescence:
Flowers: Flowers in 2--4 whorls of 3 flowers each, spaced along upper half of a scape held above the water surface; upper whorls of male flowers and lower whorls of female. Each flower white; about 1 in. wide; consisting of 3 spreading and rounded petals, 3 reflexed sepals, 15--25 bushy yellow stamens (male flowers) or a mounded, green compound ovary (female flowers).
Fruits: Fruit a brown, compact cluster of beaked achenes.
Comments:
Height: 8-30 in.
plant sale text:
bloom table text:
description: Erect, aquatic perennial of blackwater stream banks, sphagnum bogs, pocosins, beaver ponds.
stems: Flowering stem (scape) and leaves arise from an underground stem.
leaves: Leaves clustered basally and held above water surface on long petioles that may be 2-ridged; narrowly arrowhead-shaped with long, nearly linear basal lobes; 4-8 in. long; smooth.
inflorescence:
flowers: Flowers in 2--4 whorls of 3 flowers each, spaced along upper half of a scape held above the water surface; upper whorls of male flowers and lower whorls of female. Each flower white; about 1 in. wide; consisting of 3 spreading and rounded petals, 3 reflexed sepals, 15--25 bushy yellow stamens (male flowers) or a mounded, green compound ovary (female flowers).
fruits: Fruit a brown, compact cluster of beaked achenes.
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