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Gelsemium rankinii (Swamp jessamine)
Cressler, Alan

Gelsemium rankinii

Gelsemium rankinii Small

Swamp Jessamine, Rankin's Trumpetflower, Rankin's Jessamine, Swamp Yellow Jasmine

Loganiaceae (Logania Family)


USDA Symbol: GERA4

USDA Native Status: L48 (N)

Visually similar to Gelsemium sempervirens, Carolina Jessamine, but tolerates flooding better.


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Vine
Leaf Retention: Evergreen
Leaf Complexity: Simple
Leaf Shape: Lanceolate
Leaf Venation: Pinnate
Leaf Pubescence: Glabrous
Leaf Margin: Entire
Leaf Apex: Acute
Leaf Texture: Waxy
Fruit Type: Capsule
Size Notes: Stems twining, up to about 20 feet long, often shorter.
Leaf: Glossy dark green.
Flower: Flowers 1 to 1 1/2 inches. Petals 5.

Bloom Information

Bloom Color: Yellow
Bloom Time: Feb , Mar , Apr , May


USA: AL , FL , GA , LA , MS , NC
Native Habitat: Seasonally flooding bottomlands, swamps

Growing Conditions

Water Use: High
Light Requirement: Sun , Part Shade
Soil Moisture: Moist , Wet
Soil pH: Acidic (pH<6.8)
Drought Tolerance: Low
Soil Description: Very acidic, rich, moist
Conditions Comments: Must have moist to wet soil


Use Ornamental: A high-climbing vine very similar in appearance to Carolina Jessamine, but ideal for very moist areas.
Conspicuous Flowers: yes

National Wetland Indicator Status

Status: FACW
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.


Bibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski

Search More Titles in Bibliography

Web Reference

Webref 57 - Atlas of Florida Plants (2020) Institute for Systematic Botany
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Gelsemium rankinii in USDA Plants
FNA: Find Gelsemium rankinii in the Flora of North America (if available)
Google: Search Google for Gelsemium rankinii


Record Modified: 2023-04-13
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