Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Hydrolea ovata Nutt.
- Family: Waterleaf (Hydrophyllaceae)
- Flowering: June-September
- Field Marks: This speices, with its blue, bell-shaped flowers and slender spines, differs
from other members of its genus by its hairy leaves, hairy sepals, and ovate leaves.
- Habitat: Swamps, sloughs, along streams, around ponds, in ditches.
- Habit: Perennial herb with underground rhizomes.
- Stems: Upright, hairy, up to 3 feet tall, usually bearing slender 3/4 inch spines in the leaf axils.
- Leaves: Alternate, simple, ovate to ovate-lanceolate, pointed at the tip, tapering to the base, without
teeth, hairy on both surfaces, up to 2 inches long; spines usually present in the leaf axils, up to 3/4
- Flowers: In short cymes or panicles in the axils of the leaves, each flower up to 1 inch wide.
- Sepals: 5, green, free from each other, shorter than the petals, hairy.
- Petals: 5, blue, all but one attached to each other to form a short tube, up to 2/3 inch long.
- Stamens: 5, attached to the petals.
- Pistils: Ovary superior; styles 2.
- Fruits: Capsules spherical to oval, short-hairy, glandular, up to 1/4 inch in diameter.
- Notes: This species often grows in colonies because of its extensive rhizome system.
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