Flora of North America species comparison

The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

Ageratina lemmonii

Lemmon's snakeroot
Habit Perennials, 20–40(–70) cm (densely fibrous-rooted crowns).
Stems

(commonly purple) erect, puberulous (hairs usually with colored crosswalls).
Leaves

opposite;

petioles usually 0, sometimes 1–2 mm;

blades ovate-lanceolate, 2–4.5 × 0.5–2.5 cm, margins shallowly serrate, abaxial faces glabrous or glabrate, gland-dotted.
Peduncles

10–60 mm, puberulent.
Involucres

4–5.5 mm.
Corollas

white, lobes densely hispid-villous.
Phyllaries

(narrowly oblong-lanceolate) apices acute, abaxial faces sparsely hairy to glabrate.
Heads

in loose, open arrays.
Cypselae

sparsely and finely hispidulous.
2n

= 34.

Ageratina lemmonii
Phenology Flowering Aug–Oct.
Habitat Rocky slopes, mostly in pine-oak woodlands
Elevation 1800–2800[–3300, Mexico] m (5900–9200[–10800, Mexico] ft)
Distribution
from FNA
AZ; Mexico
[BONAP county map]
Source FNA vol. 21, p. 551.
Parent taxa Asteraceae > tribe Eupatorieae > Ageratina
Sibling taxa
A. adenophora, A. altissima, A. aromatica, A. havanensis, A. herbacea, A. jucunda, A. luciae-brauniae, A. occidentalis, A. paupercula, A. rothrockii, A. shastensis, A. thyrsiflora, A. wrightii
Synonyms Eupatorium lemmonii
Name authority (B. L. Robinson) R. M. King & H. Robinson: Phytologia 19: 223. (1970)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



Type/paste one or more Latin names into the boxes above; matching taxa will show up below the box as you type. You can use the up/down arrow keys to move through the list.

(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

Choose a data source: Flora of North America

The species comparison tool is brought to you by:
Northwest Wildflowers