Plant Name
Scientific Name: Ambrosia deltoidea
Synonym: Franseria deltoidea
Common Names: Triangle Bur Ragweed, Triangle Burr-Ragweed, Triangleleaf Bursage, Triangle-leaf Bursage
Plant Characteristics
Duration: Perennial
Growth Habit: Shrub, Subshrub
Arizona Native Status: Native
Habitat: Desert
Flower Color: Yellowish, Greenish
Flowering Season: Spring
Height: To 2 1/2 feet (76 cm) tall or more
Description: The staminate (male) flower heads are clustered at the tips of short flower spikes, and the pistillate (female) flower heads are clustered below them. The flowers are wind-pollinated and are followed by spiny burs. The leaves have toothed margins and are hairy, petiolate, mostly alternate, gray-green in color, triangular in shape, and up to 1 3/4 inches (4.4 cm) long. The stems are upright, hairy, and brownish to green in color.
Special Characteristics
Allergenic – The male flowers have highly allergenic pollen.
Classification
Kingdom: Plantae – Plants
Subkingdom: Tracheobionta – Vascular plants
Superdivision: Spermatophyta – Seed plants
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Subclass: Asteridae
Order: Asterales
Family: Asteraceae – Aster family
Genus: Ambrosia L. – ragweed
Species: Ambrosia deltoidea (Torr.) Payne – triangle bur ragweed
More About This Plant