Difference between revisions of "Ageratina aromatica"

(Linnaeus) Spach

Hist. Nat. Vég. 10: 286. 1841.

Common names: Small-leaved white snakeroot
Endemic
Basionym: Eupatorium aromaticum Linnaeus Sp. Pl. 2: 839. 1753
Synonyms: Eupatorium latidens Small
Treatment appears in FNA Volume 21. Treatment on page 550. Mentioned on page 548, 551.
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|label=Endemic
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|special status=Endemic
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|tribe=Asteraceae tribe Eupatorieae
 
|tribe=Asteraceae tribe Eupatorieae
 
|genus=Ageratina
 
|genus=Ageratina

Revision as of 20:57, 27 May 2020

Perennials, 30–80(–100) cm. Stems erect, villous-puberulent. Leaves opposite; petioles 1–8(–12) mm; blades narrowly to broadly deltate to nearly ovate or lanceolate, 2–7(–9) × 1.5–4 cm, (usually subcoriaceous) bases rounded or truncate to barely cuneate or subcordate, margins usually crenate, sometimes crenate-serrate to dentate or subentire, apices acute to obtuse, faces minutely pilose. Heads clustered. Peduncles 2–9 mm, densely and closely puberulent. Involucres 3.5–5 mm. Phyllaries: apices acute, abaxial faces puberulent to villous-puberulent. Corollas white, lobes sparsely villous. Cypselae usually glabrous or sparsely puberulent (near apices), rarely hirtellous on angles. 2n = 34.


Phenology: Flowering late Aug–Oct(–Nov).
Habitat: Sandy soils, burned pinelands, turkey oak sand ridges, pine-oak and oak-hickory upland woods, old fields, roadsides, fencerows, moist sites
Elevation: 100–900 m

Distribution

V21-1395-distribution-map.gif

Ala., Conn., Del., Fla., Ky., La., Md., Mass., Miss., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Va., W.Va.

Discussion

Intergrades (probable hybrids) between Ageratina aromatica and A. altissima were identified by A. F. Clewell and J. W. Wooten (1971) over a broad area of their sympatry. They also found intergrades between A. aromatica and A. jucunda where their ranges meet.

Selected References

None.

Lower Taxa

None.
... more about "Ageratina aromatica"
Guy L. Nesom +
(Linnaeus) Spach +
Eupatorium aromaticum +
Small-leaved white snakeroot +
Ala. +, Conn. +, Del. +, Fla. +, Ky. +, La. +, Md. +, Mass. +, Miss. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Va. +  and W.Va. +
100–900 m +
Sandy soils, burned pinelands, turkey oak sand ridges, pine-oak and oak-hickory upland woods, old fields, roadsides, fencerows, moist sites +
Flowering late Aug–Oct(–Nov). +
Hist. Nat. Vég. +
Eupatorium latidens +
Ageratina aromatica +
Ageratina +
species +