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Aristolochia erecta (Swanflower)
Knight, Marilyn McBroom

Aristolochia erecta

Aristolochia erecta L.


Aristolochiaceae (Birthwort Family)

Synonym(s): Aristolochia longiflora


USDA Native Status: L48 (N)


From the Image Gallery

19 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb , Vine
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Lanceolate , Linear
Leaf Margin: Entire
Leaf Apex: Acuminate
Leaf Base: Attenuate , Cuneate
Breeding System: Flowers Bisexual
Fruit Type: Capsule
Size Notes: Sprawling to erect. Up to about 10 inches tall.

Bloom Information

Bloom Color: Purple , Brown
Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct



Growing Conditions

Water Use: Low , Medium
Light Requirement: Sun , Part Shade
Soil Moisture: Moist
Conditions Comments: Swanflower is a trailing grass mimic, presumably to evade female Pipevine swallowtail butterflies looking for a good place to lay their eggs. The caterpillars are black or orange and fleshy, often easier to spot than their host plants. Swanflower has intriguing tubular shaped flowers that look like small orchids.


Conspicuous Flowers: yes
Attracts: Butterflies
Larval Host: Pipevine swallowtail

Butterflies and Moths of North America (BAMONA)

Pipevine Swallowtail
(Battus philenor)

Larval Host
Learn more at BAMONA

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Fredericksburg Nature Center - Fredericksburg, TX
Brackenridge Field Laboratory - Austin, TX
NPSOT - Austin Chapter - Austin, TX

Herbarium Specimen(s)

NPSOT 0125 Collected July 10, 1991 in Bexar County by Lottie Millsaps

1 specimen(s) available in the Digital Herbarium


Bibref 1186 - Field Guide to Moths of Eastern North America (2005) Covell, C.V., Jr.
Bibref 1185 - Field Guide to Western Butterflies (Peterson Field Guides) (1999) Opler, P.A. and A.B. Wright

Search More Titles in Bibliography

Additional resources

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


Record Modified: 2022-03-16
Research By: Damon Waitt

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