Ageratina aromatica
Ageratina jucunda
lesser snakeroot, small-leaf white snakeroot
hammock snakeroot, lesser snakeroot
erect, villous-puberulent.
erect, lax, minutely pilose.
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.
opposite;
petioles 7–15(–22) mm;
blades narrowly deltate to rhombic, 2–6(–7) × 1.5–4 cm, (usually subcoriaceous) bases usually cuneate, sometimes truncate to slightly subcordate, margins usually coarsely serrate or incised, sometimes crenate to subentire, apices acute to acuminate, abaxial faces glabrous or hairy on veins.
2–9 mm, densely and closely puberulent.
2–10 mm, sparsely puberulent.
3.5–5 mm.
2.5–4 mm.
white, lobes sparsely villous.
white, lobes glabrous or sparsely short-hirtellous.
apices acute, abaxial faces puberulent to villous-puberulent.
apices acute, abaxial faces puberulent to villous-puberulent.
clustered.
clustered.
usually glabrous or sparsely puberulent (near apices), rarely hirtellous on angles.
usually finely hirtellous-strigose on distal 1/3, sometimes glabrous.
= 34.
= 34.
Ageratina aromatica
Ageratina jucunda
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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