Species Detail Forb

Flower Aspen Creek Tr - Sue Smith		Yavapai County Native & Naturalized Plants Conyza canadensis - Canadian horseweed Other Common Names: horseweed Plant Form: Forb Family: Asteraceae
Flower Aspen Creek Tr - Sue Smith


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Bracts Aspen Creek Tr Sue Smith	Flower head Aspen Creek Tr Sue Smith	Leaf attachment Aspen Creek Tr Sue Smith	Leaf Aspen Creek Tr Sue Smith	Plant - summer Aspen Creek Tr Sue Smith	Young plant - summer Aspen Creek Tr Sue Smith

Forb Plant Description

Origin: Introduced Life Cycle: Biennial or annual
General Desc: A common very vertical, tall weed. Not branched except for multiple flowering stems spreading outward near the top of the plant. Considered invasive in some areas of the U.S. Heights reported as much as 7 feet.
Identification notes: Tall annual herb, many branched leafy stems with alternate simple leaves. Stem and branches covered with short, bristly hairs. Flower heads 3 to 5 mm across, crowded in branched terminal clusters, composed of white ray and yellow disc florets.
Height: Up to 7 feet

Habitat

Habitat Description: Found in pastures, fields, waste areas and along roadsides. Grows in many different soils.
Plant Communities: Disturbed Areas
Elevation: 1000 - 8000 feet

Flower Characteristics

Color: White and yellow Shape: Daisy or dandelion-like in clusters Tubular: N Flowering Period: Jul - Oct
Description: Has many inconspicuous flowers forming small composite flower heads about 1/8 inch across. Composite heads have white ray flowers and yellow disc flowers.

Leaf and Stem Characteristics

Leaf Color: Green Leaf Type: Simple Leaf Shape: Narrow Leaf Margin: Smooth Leaf Attachment: Alternate Leaves Clasp: N
Hairs: Leaves and stems Spines: N
Leaf Description: Leaves alternate around the main vertical stem. To 4 inches long and 1/2 inch wide. Has a few white hairs along the edge.

Fruit and Seed Characteristics

Fruit Color: Brown
Fruit Type: Achene
Fruit Notes: Elliptic in shape.


	Arizona Cooperative Extension Yavapai County 840 Rodeo Dr #C Prescott, AZ 86305 (928) 445-6590	Version 8.0 http://cals.arizona.edu/yavapaiplants/SpeciesDetailForb.php Last Updated: Feb 16, 2020 Content Questions/Comments: Email Jeff Schalau Legal Disclaimer