Mexican fleabane or Canadian fleabane: how to tell them apart?
Mexican fleabane and Canadian fleabane look alike and are often mixed up. Here is how to tell them apart, feature by feature, with their photos and the details to look for.
⚡ The quick answer
Mexican fleabane
Erigeron karvinskianus
Canadian fleabane
Erigeron canadensis
Canadian fleabane is an upright plant with a single stem branching profusely at the top, with tiny, inconspicuous flower heads, whereas Mexican fleabane forms low spreading clumps with clearly visible flower heads with white-pink rays.
🍃 Leaves
Small, lanceolate, slightly hairy, bright green
Numerous, narrow, alternate, densely covering the stem
🌸 Flowers
Small white daisies turning pink as they age, very numerous
Tiny whitish flower heads in large numbers, forming a narrow pyramid
🍎 Fruits
Achenes topped with a pappus
Tiny achenes with a pappus
🪵 Bark
Low trailing stems, spreading habit
Upright, stiff herbaceous stem, sparsely branched
📏 Size
15 to 30 cm tall
20 cm to 1.5 m
🗺️ Habitat
Walls, low walls, rock gardens, gardens, poor free-draining soils
Wasteland, vacant plots, cracks in pavements
⚠️ Toxicity
No known toxicity.
No known toxicity
🔎 And from the Canadian fleabane side
Canadian fleabane is an upright plant with a single stem branching profusely at the top, with tiny, inconspicuous flower heads, whereas Mexican fleabane forms low spreading clumps with clearly visible flower heads with white-pink rays.
🌿 Go further
Want to practise spotting these details on real photos? Floraneo offers profiles and quizzes for dozens of look-alike species.
ℹ️ Educational profile — do not use it to judge whether a plant is edible or safe.