Conyza canadensis var. canadensis (Canadian horseweed)

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Conyza canadensis (L.) Cronquist var. canadensis

Canadian horseweed

[An article has not been written yet.]

Erigeron canadensis L.
Leptilon canadense (L.) Britton

8/20/2025 · Peaks Island, Maine · ≈ 12 × 19″ (30 × 48 cm)

8/29/2014 · Drive along gorge, New Mexico · ≈ 1½ × 2′ (43 × 61 cm)

8/20/2025 · Peaks Island, Maine · ≈ 1 × 1½′ (30 × 44 cm)

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Asteridae	A large class that encompasses asters
Order	Asterales	Flowering plants with a central disk flower and surrounding petals, like daisies
Family	Asteraceae	The aster family, which also includes daisies and sunflowers; from the Greek ἀστήρ, “star,” for the star-shaped flowers
Genus	Conyza	From Greek konops, “flea,” for the use of the leaves in beds as a flea repellant
Species	canadensis	“Of or referring to Canada”
var.	canadensis	“Of or referring to Canada”

Range:

Conyza canadensis var. canadensis description by Thomas H. Kent, not updated.