Contains 3 accepted taxa overall.
Characteristics
Classification
Citation
AGERATINA Spach, Hist. Nat. Vég. 10: 286. 1841.
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TYPE: Ageratina aromatica (Linnaeus) Spach (Eupatorium aromaticum Linnaeus) Lectotypified by R. M. King & H. Robinson, Sida 3: 330. 1969.
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Ageratina altissima | Common White Snakeroot, Common Milk-poison | |||
| Ageratina aromatica | Small-leaved White Snakeroot, Wild-hoarhound | |||
| Ageratina roanensis | Appalachian White Snakeroot, Appalachian Milk-poison |
Identification Key
1. Petioles (5)10-30(50) mm long; leaf blade 2.5-8(9) cm wide, chartaceous; phyllaries 3-7 mm long; roots mostly 0.3-0.8 mm thick
1. Petiole 1-15(22) mm long; leaf blade 1.5-4 cm wide, relatively subcoriaceous; phyllaries 2-4.5 mm long; roots mostly 0.8-2 mm thick
2
2. Petioles 1-12 mm long; leaf blades mostly 5-8 times longer than the subtending petiole, the blade margins usually shallowly crenate to subentire; corolla lobes usually densely long-pubescent; achenes usually glabrate
2. Petioles 7-22 mm long; leaf blades mostly 1-4 times longer than the subtending petiole, the blade margins usually strongly toothed; corolla lobes usually sparsely short-pubescent to glabrate; achenes usually pubescent, at least apically
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|---|---|---|
| No synonyms found. | |||