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Woolly Dutchman's-pipe

Isotrema tomentosum

Found in bottomland and riparian forests, stream and river banks, disturbed areas. Weakley, Flora of the Southeastern United States (2025), South Central edition What its natural habitat tells you

20
Good

Native to Alabama. How scores work Is it native here?

Profile 94%

Height
20–30 feet
Spread
5–10 feet
Light
Full sun, Partial shade
Soil moisture
Moist to standing water

Space about 7.5 ft apart from its recorded spread. Enter your bed size for a count

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At a glance

Life cycle
Woody perennial
Leaves
Deciduous
Bloom
May to June

Recorded in 43 Alabama counties.

Natural habitats

Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.

1 of 4

Forests and woodlands

Trail on Little Kennesaw Mountain.
Named place / source context. Shown: Kennesaw Mountain National Battlefield Park, Georgia, a neighboring state.Trail on Little Kennesaw Mountain., Unidentified in HFC record, undated. Public domain. Source record.

Floodplain and bottomland forests

Forests on low ground beside rivers and streams that flood from time to time.

Streams, rivers and their banks

Flowing water and its banks, bars and rocky shoals.

Roadsides, fields and disturbed ground

Ground opened by people: roadsides, old fields, pastures, fencerows and lots.

All habitats

Ecological relationships

Who uses this plant?

What these records mean

1CaterpillarsGenus host records with ranges including AL

Genus host records with ranges including AL · Isotrema

Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
1BeesSoutheastern regional records

Southeastern regional records · Aristolochia

Individual names are not available yet.

Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
0Specialist beesPollen specialists
—BirdsRecorded genus food-resource interactions; not a state feeding claim

No records yet · Ants · Beetles · Flies · Adult butterflies / moths · Other wasps · Other insects

Growing and identification

Plant details

Family
Aristolochiaceae
Hardiness
Zones 5a–8b
Soil pH
Acidic to alkaline
Flower color
Yellow, green or purple

Safety has not been reviewed for this plant; check toxicity and thorns before planting.

Growing sources and scope
Also known as

Aristolochia tomentosa; Woolly Dutchman's pipe; Woolly Dutchmans Pipe; Wooly Pipe Vine

Conservation status

Alabama rankSNR
Global rankG5
AL statusNot verified
Federal statusNot verified

Conservation source Global and federal source

In your garden

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Sources