Scientific: Callaeum macropterum (formerly Mascagnia macroptera and Stigmaphyllon ciliatum)
Common: yellow butterfly vine, butterfly pea vine, yellow orchid vine, gallinita
Family: Malpighiaceae
Origin: Northwestern Mexico to as far south as Brazil.

Pronounciation: Cal-lay-EE-um ma-crop-TER-um

Hardiness zones:
Sunset 12-24
USDA 8 (will sustain foliage and stem freeze damage most winters), 9 - 11

Landscape Use: Heat tolerant vine for fully exposed desert green or hard walls, accent vine that needs support.

Form & Character: Informal, upright vining, twining, spreading, gentle looking, but tough as nails.

Growth Habit: Evergreen, woody, perennial vine in Phoenix, will freeze to ground, but quickly recover in colder climate. Moderate growth to 30 feet, requires support for upright habit, or else it will sprawl.

Foliage/texture: Simple, smooth and entire glaborous, opposite leaves, ovate to elliptic, green, to 2 inches long and one inch wide; medium texture.

Flowers & fruits: Clusters of 5 petaled, yellow flowers. Fruits paper thin and shaped like butterflies, lime green when immature changing to cinnamon-brown when mature.

Seasonal color: Flower and fruits profusely throughout the year so that both flowers and fruit adorn this wonderful vine simultaneously.

Temperature: Heat loving, but damaged by cold lower than 24oF, quickly recovers.

Light: Full sun to filtered shade.

Soil: Grows well in amended, well drained desert soils. Avoid heavy clay soils.

Watering: Must have regular deep irrigations in Phoenix. Drip irrigation is best. Yellow butterfly vine might become aggressive and spread in flood irrigated Phoenix landscapes.

Pruning: Only light pruning to contrl spread and direct growth is necessary.

Propagation: Easy from seed or semi-softwood cuttings taken in late spring or early fall.

Disease and pests: None

Additional comments: Yellow butterfly vine is a delicate looking but very tough vine for arid Phoenix landscapes. This cool vine should be used more in Phoenix landscapes!

Note: "ptera" is latin for 'winged'.