Marestail (Horseweed); Erigeron canadensis
Family: Asteraceae; Sunflower Family
Vegetative Characteristics:
Seedling: Cotyledons green, lacking evident veins, smooth. Early leaves entire and subsequent leaves toothed with a short apical projection, blades green on upper surface and light green on lower smooth surface.
Stems: Simple solid, erect with bristly hairs
Leaves: Alternate, simple linear to oblanceolate, sessile, crowned on stem, entire or toothed, more or less pubescent or at least coarsely ciliate near base.
Reproductive Characteristics:
Flowers: Numerous small heads arranged in an elongated panicle, white to lavender ray flowers, disk flowers yellow.
Fruit/Seed: Achenes about 1 mm long tapered from base to apex with numerous slender white bristles at apex, yellowish, hairy with ribbed margins. Pappus bristles white to tan, antrorsely barbed
Special Identifying Features:
⇒ Tall, dark green erect plant with sessile leaves.
- Seedling
- Young Plants
- Mature Plants
- Basal Rosette
- Single Leaf
- Seedhead
- Seeds
