
Hairy Cluster-Vine
jacquemontia tamnifolia
The Hairy Cluster-Vine (Jacquemontia tamnifolia) is a charming yet resilient annual vine belonging to the morning glory family, Convolvulaceae. Native to the southeastern United States, Central America, and parts of South America, this plant is famous for its striking, dense clusters of sky-blue to lavender flowers. It thrives in sunny, disturbed habitats, often sprawling across fields, climbing fences, or scaling neighboring plants. While gardeners and nature enthusiasts admire its delicate, funnel-shaped blooms, farmers often view it as a persistent weed because its tough, twining stems can easily entangle agricultural machinery during harvests. Despite its reputation in agriculture, the Hairy Cluster-Vine plays an important ecological role by providing nectar for a variety of native bees, butterflies, and other pollinators during the late summer months.
Habitat: Typically found in disturbed soils, agricultural fields, roadsides, and sandy coastal plains.
Appearance
This climbing or sprawling vine is easily recognized by its dense, head-like clusters of tiny, funnel-shaped flowers, which range from a brilliant sky-blue to violet-blue. Each cluster is surrounded by prominent, leaf-like bracts that are heavily covered in soft, spreading brownish-tawny hairs, giving the plant its namesake hairy appearance. The leaves are ovate to heart-shaped, measuring up to 10 cm in length, with pointed tips and smooth margins. The stems themselves are also densely hairy and can grow up to 4 meters long, winding tightly around any available support.

Category
PlantsRarity
Common
Danger
1/5 ยท Very low
Snaps
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Interesting facts
Despite being in the morning glory family, its flowers open in the morning and typically wilt by mid-afternoon of the same day.
It is considered a major weed in cotton and soybean fields in the southeastern United States because its tough, twining vines can easily tangle harvesting machinery.
Its species name, 'tamnifolia', means 'leaves like Tamnus' (a genus of climbing plants also known as black bryony).
Special abilities
Thigmotropic Twining
The vine's stems are highly sensitive to contact, allowing them to rapidly coil around vertical structures or neighboring plants to climb toward sunlight.
Hairy Armor
The dense coating of bristly, tawny hairs on the stems and floral bracts deters crawling insect herbivores and reduces water loss in hot, dry environments.
Synchronized Morning Bloom
Flowers open simultaneously in the early morning to capitalize on peak pollinator activity, closing and wilting by afternoon to conserve moisture.
Measurements & details
- Length
- 100-400 cm
- Weight
- 0.1-1 kg
- Lifespan
- 1 years
Diet & Feeding
As a photoautotrophic plant, it generates its own energy through photosynthesis, utilizing sunlight, water, and carbon dioxide.
Primary Foods
- Sunlight
- Water
- Carbon dioxide
- Soil nutrients
Ecological connections
Honey Bee
Apis mellifera
Visits the bright blue flowers to forage for nectar and pollen, aiding in pollination.
Sweetpotato Leafminer
Bedellia somnulentella
The larvae of this moth mine the leaves of the plant, feeding on the inner tissues.
Traits
No trait badges are assigned for this object yet.
Also known as
No aliases listed yet.
Collections
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Safety
Danger
1/5 ยท Very low
No special safety notes yet.
Frequently Asked Questions
How to identify Hairy Cluster-Vine?
The easiest way to identify Hairy Cluster-Vine is to use the Snappit nature identifier app.
How long is Hairy Cluster-Vine?
100-400 cm
How much does Hairy Cluster-Vine weigh?
0.1-1 kg
How long does Hairy Cluster-Vine live?
1 years
What does Hairy Cluster-Vine eat?
As a photoautotrophic plant, it generates its own energy through photosynthesis, utilizing sunlight, water, and carbon dioxide.
Where is Hairy Cluster-Vine usually found?
Typically found in disturbed soils, agricultural fields, roadsides, and sandy coastal plains.
Snap Map
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Recent Snaps
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Where to spot

Alabama, US
Commerce Street Residential Historic District
You might spot Anole, Bee, and Bristle Thistle.
View guide โ

Alabama, US
East Commerce Street Historic District
You might spot Anole, Bee, and Bristle Thistle.
View guide โ

Alabama, US
Fort Dale-College Street Historic District
You might spot Anole, Bee, and Bristle Thistle.
View guide โ

Alabama, US
King Street Historic District
You might spot Anole, Bee, and Bristle Thistle.
View guide โ

Alabama, US
Post Office Historic District
You might spot Anole, Bee, and Bristle Thistle.
View guide โ

Alabama, US
South Greenville Historic District
You might spot Anole, Bee, and Bristle Thistle.
View guide โ







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