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American Burnweed
Erechtites hieracifolia (L.) Raf.
Asteraceae (Aster Family)
▲ ▼ young plants
▲ ▼ young plants
▲ young plants
▲ leaves and stem
▲▼ plants with flower buds
▲▼ plants with flower buds
▲▼ mature flowering plants
▲ mature flowering plants
▲▼ fruit
Erechtites hieraciifolius (L.) Raf. ex DC., American Burnweed, Pilewort: (Bayer Code: EREHI; US Code ERHI2)
· U.S. native, mostly-unbranched, rapidly-growing summer annual weed that grows 3-9 feet tall
· Leaves and stems are bright green, fleshy, lanceolate with shallow teeth along the margin (more toward leaf-tip); some plants have deeper pointed lobes, with teeth along their margins, while others may have unlobed leaves with tiny teeth on margins
· Flowers are in open, terminal clusters, similar to horseweed (Conyza canadensis), but burnweed’s flowers are larger, and not as many as horseweed; similar to horseweed, flowers don’t open much, similar to horseweed
· Bracts below inflorescence are linear to thread-like and in several rows; tips of bracts may stand out slightly away from base of head
· Seeds have parachutes (pappus) attached that allow for wind dispersal, making mature flower clusters looking sort of feathery as fruits open to release seeds
· Common in disturbed sites, cultivated crops, gardens, open woods; tolerates moderate shade, but needs fairly moist, well-drained soil; can be one of the first plants to colonize a site after burning, giving rise to its common name
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