Scientific Name: Aristolochia watsonii
Common Names: Watson's Dutchman's Pipe, Southwestern Pipevine
Growth Habit: Vine, Herb/Forb
Arizona Native Status: Native
Habitat: Desert, Upland, Riparian
Flower Color: Green and dark brown
Flowering Season: Spring (late), Summer, Fall (early)
Height: Trailing to 3 feet (91 cm) long
Description: The flowers are tubular, 1 1/4 inches (3.2 cm) long, recurved, and have an elongated brown mouth and a green, hairy throat with brown spots. The leaves are long, narrow, arrow-shaped, and green to brownish in color. The fruit is plump, green, and ribbed.
Butterfly Plant – It is the food plant for Pipevine Swallowtail (Battus philenor) caterpillars. These caterpillars will eat both the leaves and the fruit.
Poisonous – These plants are poisonous and contain the toxic aristolochic acid.
Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Family: Aristolochiaceae – Birthwort family
Genus: Aristolochia L. – dutchman's pipe
Species: Aristolochia watsonii Woot. & Standl. – Watson's dutchman's pipe
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