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PENTALINON luteum

Image of Pentalinon luteum

Grandiflora

Family

Apocynaceae

Botanical Name

PENTALINON luteum

Plant Common Name

Hammock Viper's-tail, Wild Allamanda

General Description

Wild allamanda's twining stems and glossy yellow-green leaves are a pretty backdrop to the cheerful light yellow flowers from spring to fall. A shrubby evergreen, this frost-tender vine is native to Tropical America, from Florida and the Caribbean islands southward into Latin America. Its foliage is oval, simple (no lobes), glossy and yellowish-green. Sometimes, but rarely, the leaves may be matte with tiny hairs. Anytime sunshine and warmth is plentiful, the light yellow, trumpet-like blossoms appear on the tips of new growth and from side branches on the vine. Hummingbirds and butterflies will visit the blossoms.

Wild allamanda grows well in average to poor, well-drained soils in full to partial sun. Provide ample moisture, especially from spring to late summer, to prevent leaf drop. It is also drought and salt tolerant. Grow it as a small vine upon a trellis or allow it to ramble in a mound in the mixed border or as a groundcover among shrubs and rocks. In cold climates use it as a summer annual in a container on the patio.

The cut stems exude a milky latex that may cause skin irritation. Wild allamanda is also confusingly labeled as "yellow mandevilla" in nurseries across North America.

Characteristics

  • AHS Heat Zone

    12 - 10

  • USDA Hardiness Zone

    10 - 15

  • Sunset Zone

    H1, H2, 24

  • Plant Type

    Vine/Liana

  • Sun Exposure

    Full Sun

  • Height

    8'-10' / 2.4m - 3.0m

  • Bloom Time

    Spring, Late Spring, Early Summer, Summer, Late Summer, Early Fall, Fall, Late Fall

  • Native To

    Southeastern United States, Latin America and the Caribbean

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Tolerances

    Pollution, Drought, Salt

  • Growth Rate

    Fast

  • Water Requirements

    Drought Tolerant, Average Water

  • Habit

    Vining/Climbing

  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Light Yellow

  • Foliage Color (Spring)

    Light Green, Yellow Green

  • Foliage Color (Summer)

    Green, Yellow Green

  • Foliage Color (Fall)

    Green, Yellow Green

  • Foliage Color (Winter)

    Green, Yellow Green

  • Bark Color

    Sandy Brown

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    Yes

  • Foliage Texture

    Medium

  • Foliage Sheen

    Glossy

  • Evergreen

    Yes

  • Showy Bark

    No

Special Characteristics

  • Bark Texture

    Smooth

  • Usage

    Container, Hanging Basket, Mixed Border, Rock Garden / Wall, Tropical, Vine

  • Sharp or Has Thorns

    No

  • Invasive

    No

  • Attracts

    Hummingbirds, Butterflies

  • Self-Sowing

    No