Saxapahaw, NC

The Flower of Carolina


  • Product Info

    Dutchman's-pipe (Isotrema macrophyllum)
    Birthwort Family

    Large,dense, heart-shaped leaves can reach up to 1’ long and make an excellent screen. Twining vines need something to climb on to get started, but old runners become woody and provide support for younger shoots.  Plants can grow up wires, trees, or large arbors. Flowers are attractive, but very inconspicuous among the dense foliage. Flowers have a distinct odor that makes them attractive to their main pollinator–flies. This species will grow best in rich, moist soil in part shade, but is fairly adaptable to more average garden conditions. Toxic foliage is eaten by the Pipevine Swallowtail caterpillar, which then becomes toxic itself. This species has large leaves and is less prone to suckering than Isotrema tomentosa.

    Blooms: Yellow/purple, 3-4 weeks, May-June
    Leaves: 10-12” heart shaped leaves are highly attractive and dense
    Height: 15-40’
    Space: 5-10’
    Soil: Moist-Average
    Exposure:  Part sun-Part shade-Shade
    Fauna: Fly pollinated, host to Pipevine Swallowtail, dense foliage provides cover
    Seeds:  Large elliptical capsule with hard, flat, stacked seeds
    Deer Resistance: High
    Zone: 4-8
    Native Status:NC native, common in the Mountains
    Provenance: NC, seed grown