Swaziland's Alien Plants Database

Pontederia cordata L. var. ovalis Solms-Laub
Pickerel weed
Invasive, Potential problem species
Origin: North, Central and South America (Eastern USA to the Caribbean, Honduras, Brazil and Argentina)
Growth Form: Herb
Plant Description: Plant: Perennial, rooted aquatic plant 1–2 m high, with erect emergent stems and horizontal rhizome, forming colonies. Leaves: Light or yellowish-green, one per stem, with long stem-clasping petioles; cordate (heart-shaped) in var. cordata, ovate or lanceolate in var. ovalis, up to 230 mm long x 70 mm wide. Flowers: Blue, in spikes 50-150 mm long; each flower about 15 mm long, upper petal with yellow blotch in centre; September–June. Fruit: None seen in South Africa; apparently sterile; spreads vegetatively from fragmented rhizomes.
Key Features:
Comments: Suspected/Possible
More information:
Weeds & Invasive Plants Home Page
NRCS Plants Database

Photo - flowers

Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA NRCS. 1995. Northeast wetland flora: Field office guide to plant species. Northeast National Technical Center, Chester, PA.


USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada.

Photo - plant

Jim Stasz @ USDA-NRCS PLANTS Database

Photo - flowers/leaves

William S. Justice @ USDA-NRCS PLANTS Database

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