Common Dutchman’s Pipe

Isotrema tomentosum

Pollinator Value

🐛 Larval Host: Battus philenor (Pipevine Swallowtail)
S14 host record; S4 Larval Host confirmed u2014 note: range does not extend to ON/QC

Proximity Score: 2
Native Status: ❌ Outaouais ❌ Ottawa ❌ QC ❌ ON
Closest Direction: SW
CEC Eco-Regions: 8 – Eastern Temperate Forests, 8.2 – Central USA Plains, 8.2.4 – Eastern Corn Belt Plains
Rarity Notes: Not native to Ontario or Quebec. NatureServe global rank G5 (Secure), US national rank N4. Native range restricted to southeastern and south-central US (FL, GA, IL, IN, KS, KY, SC). Not listed under SARA.
S22 S26
Migration: Stable
Ecological Context: Bottomland vine of the southeastern and south-central United States, found twining along stream banks, floodplains, and rich moist woods in sandy and silty soils. Associated with mesic deciduous forests where it climbs into the canopy. Serves as the sole larval host for Battus philenor (Pipevine Swallowtail) in its native range. Well outside its natural distribution relative to the Ottawa Valley.
S4 S29 S22

Category: Antidote, Bitter, Diaphoretic, Expectorant, Febrifuge, Odontalgic, Stimulant, Tonic
S29
Notes: Root traditionally used as bitter tonic, diaphoretic, and stimulant. Chewed in minute doses or used as weak tea to promote sweating and expectoration. Applied to snakebites — considered the most popular snakebite remedy in North America. Contains aristolochic acid, which is carcinogenic and damaging to kidneys; should only be used internally under professional supervision. Bruised root placed in hollow teeth for toothache. Medicinal activity similar to but weaker than A. serpentaria.
S29

❌ Not Edible