Ageratina havanensis
Ageratina luciae-brauniae
Havana snakeroot, shrubby boneset, white mistflower, white shrub mistflower
lucy Braun's snakeroot, rockhouse white snakeroot
erect (brittle), puberulent to glabrous.
erect, glabrous.
persistent, opposite;
petioles 3–10(–15) mm;
blades deltate to broadly ovate or somewhat hastate, (2–)3–5(–8) × 2–5 cm, bases truncate to cuneate, margins dentate, apices acute, faces glabrous or nearly so, eglandular.
opposite;
petioles 25–70 mm;
blades broadly ovate-deltate, 4–8 × 5–9 cm, (thin, delicate) bases truncate to subcordate, margins coarsely dentate, apices acute to acuminate, abaxial faces glabrous or sparsely puberulent.
2–14 mm, minutely puberulent.
1–3 mm, glabrous or sparsely puberulent.
4–6 mm.
3.5–4 mm.
white to slightly pinkish, glabrous.
white, lobes glabrous or sparsely puberulent.
apices acute, abaxial faces glabrous or nearly so.
apices acuminate, abaxial faces glabrous or sparsely puberulent.
clustered.
clustered.
hispid.
sparsely and evenly hirtellous.
= 34.
= 34.
Ageratina havanensis
Ageratina luciae-brauniae
Ageratina havanensis apparently is the only species of the genus in the flora area with evergreen-persistent leaves.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Ageratina luciae-brauniae was treated by A. F. Clewell and J. W. Wooten (1971) as a synonym of A. altissima and regarded by them as “bizarre plants showing extreme signs of etiolation from growing under limestone ledges” (p. 134). B. E. Wofford (1976) observed that greenhouse transplants of both species maintained distinctions that provide rationale for maintaining A. luciae-brauniae at specific rank.
Ageratina luciae-brauniae is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
