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Eupatorium capillifolium (Lamarck) Small. Common Dog-fennel, Yankeeweed, Cypressweed, Horsetail. Phen: Sep-Nov. Hab: Disturbed soils, old fields, clearcuts. This species, like E. compositifolium, is an excellent indicator of soil disturbance. Dist: CT, PA, KY, MO, and OK south to s. FL and TX; Bahamas; Cuba.

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, Bah, C, F, Fl7, FNA21, G, GW2, Il, K1, K3, K4, NcTx, NY, S, SE1, Tat, Tn, Tx, Va, W, WH3, WV; = Eupatorium capillifolium (Lam.) Small var. capillifolium – RAB; = n/a – Pa

Links to other floras: = Eupatorium capillifolium - FNA21

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACU
  • Eastern Mountains and Piedmont: FACU
  • Great Plains: FACU
  • Midwest: FACU
  • Northcentral & Northeast: FACU

Heliophily ⓘ: 8

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image of plant© Erik Danielson source | Original Image ⭷
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Jeffrey S. Pippen | Original Image ⭷
image of plant© Keith Bradley | Original Image ⭷
image of plant© Jeffrey S. Pippen | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Robust and weedy, erect perennial found in disturbed soils of old fields and clearcuts in a range of moist to dry conditions.

Stems: Stems 1-several from a somewhat woody crown, stout, branched above, reddish and hairy, the lower stem often with dead, brown leaves.

Leaves: Leaves opposite or alternate, crowded, 1-4 in. long, pinnately divided into thread-like segments, bright green, dotted with glands and emitting a pungent odor similar to fennel when crushed.

Inforescence:

Flowers: Composite flowers (heads) in multiple small clusters along drooping branches of the pyramind-shaped top of the plant; heads tiny, consisting of 3-5 minute,creamy white or purplish, tubular disk florets.

Fruits:

Comments: The similar E. compositifolium is mostly restricted to the Coastal Plain; it has hairy, grayish-green divided leaves with slightly broader segments, branches that are ascending to spreading, and white composite flowers. Flowers of both species are mildly fragrant.

Height: 1 1/2-6 ft.

plant sale text:

bloom table text:

description: Robust and weedy, erect perennial found in disturbed soils of old fields and clearcuts in a range of moist to dry conditions.

stems: Stems 1-several from a somewhat woody crown, stout, branched above, reddish and hairy, the lower stem often with dead, brown leaves.

leaves: Leaves opposite or alternate, crowded, 1-4 in. long, pinnately divided into thread-like segments, bright green, dotted with glands and emitting a pungent odor similar to fennel when crushed.

inflorescence:

flowers: Composite flowers (heads) in multiple small clusters along drooping branches of the pyramind-shaped top of the plant; heads tiny, consisting of 3-5 minute,creamy white or purplish, tubular disk florets.

fruits:

comments: The similar E. compositifolium is mostly restricted to the Coastal Plain; it has hairy, grayish-green divided leaves with slightly broader segments, branches that are ascending to spreading, and white composite flowers. Flowers of both species are mildly fragrant.

cultural notes:

germination code:

native range: southeastern United States