Species Detail Forb

Flowers		Yavapai County Native & Naturalized Plants Ambrosia trifida - great ragweed Other Common Names: buffaloweed, giant ragweed Plant Form: Forb or Subshrub Family: Asteraceae
Flowers


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Leaves Max Licher @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)	Plant Max Licher @http://swbiodiversity.org, Usage Rights: Creative Commons Attribution-ShareAlike (CC BY-SA)

Forb Plant Description

Origin: Native Life Cycle: Annual
General Desc: A tall, sturdy, rough-hairy plant with elongated terminal clusters of nodding male flower heads.
Identification notes: Leaves are mostly opposite. Usually some blades are palmately shaped with 3 to 5 lobes.
Height: 6 to 12 feet

Habitat

Habitat Description: Fertile moist soils, waste places, and thickets. A serious pest in cultivated crops.
Plant Communities: Riparian, Disturbed Areas
Elevation: Below 5200 feet

Flower Characteristics

Color: Green Shape: Daisy or dandelion-like in elongated clusters Tubular: N Flowering Period: May - Sep
Description: Male flowers are abundant in spike-like clusters on the tips of branches and stems. Female flowers are few, have no petals, and are located in the axils of the upper leaves.

Leaf and Stem Characteristics

Leaf Color: Green Leaf Type: Simple Leaf Shape: Palmate Leaf Margin: Lobed Leaf Attachment: Opposite Leaves Clasp: N
Hairs: Leaves and stems Spines: N
Leaf Description: Stem is thick, fleshy and black-lined. Leaves vary in shape, some are ovate and some are palmate with 3 to 5 lobes.

Fruit and Seed Characteristics

Fruit Type: Achene
Fruit Notes: Burs are conical with a woody hull and a beak.


	Arizona Cooperative Extension Yavapai County 840 Rodeo Dr #C Prescott, AZ 86305 (928) 445-6590	Version 8.0 http://cales.arizona.edu/yavapaiplants/SpeciesDetailForb.php Last Updated: Dec 13, 2022 Content Questions/Comments: Email Matt Halldorson Legal Disclaimer