Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Jacquemontia tamnifolia (L.) Griseb.
- Family: Morning-glory (Convolvulaceae)
- Flowering: August-September
- Field Marks: This annual twining vine is recognized by its long-spreading hairs and its blue,
funnel-shaped flowers crowded into head-like clusters.
- Habitat: Roadsides, fields, disturbed areas, floodplain forests, stream banks, ditches.
- Habit: Annual, twining, herbaceous vine.
- Stems: Twining, with long, spreading hairs.
- Leaves: Alternate, simple, ovate, pointed at the tip, rounded or heart-shaped at the base,
without teeth or with wavy edges, sparsely hairy at first, usually becoming smooth at maturity,
up to 5 inches long, up to 2 1/2 inches wide.
- Flowers: Several in dense, axillary heads, up to 1 1/2 inches across; each flower subtended
by lanceolate, long-hairy bracts.
- Sepals: 5, green, united below, long-hairy, up to 3/4 inch long.
- Petals: 5, blue, united to form a funnel, up to 1 inch across.
- Stamens: 5, attached to the tube of the petals.
- Pistils: Ovary superior; stigmas 2.
- Fruits: Capsules spherical, up to 1/4 inch in diameter, shorter than the persistent sepals; seeds
brownish black, smooth, about 1/10 inch long.
- Notes: If not controlled, this vine will cover up crop fields in low areas.
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