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rosy camphorweed

longleaf camphorweed

Habit Perennials, 40–60 cm; fibrous-rooted, sometimes rhizomatous. Perennials, 60–150(–250) cm; fibrous-rooted.
Stems

puberulent to sparsely villous and stipitate- to sessile-glandular (sometimes viscid).

sparsely arachnose.

Leaves

sessile;

blades ovate to ovate-oblong or elliptic-oblong, 2–7 × 0.5–3 cm (bases cuneate to truncate or subcordate, clasping to subclasping), margins shallowly apiculate-toothed, faces puberulent to sparsely villous and stipitate- to sessile-glandular (sometimes viscid).

(crowded) sessile;

blades oblong to elliptic, lance-ovate, or ovate, mostly 8–20 × 3–7 cm (bases clasping to subclasping), margins coarsely and irregularly toothed, abaxial faces villous and sessile-glandular, adaxial hirtellous and sessile-glandular.

Heads

in corymbiform arrays.

in corymbiform arrays.

Involucres

campanulate to turbinate-campanulate or turbinate, 4–6 × 5–9 mm (bases obtuse to barely acute).

cylindro-campanulate, 9–12 × 6–9 mm (lengths mostly 2 times diams.).

Corollas

rose-pink to purplish.

creamy white.

Phyllaries

rose-pink to purplish, moderately appressed-villous to puberulous or arachnose, usually viscid-hairy as well (outer phyllaries ovate-acuminate to ovate-lanceolate, lengths 0.5–1 times inner).

creamy white, powdery puberulent, sometimes sparsely glandular (mid phyllaries 2.5–3 mm wide).

Pappi

persistent, bristles distinct.

persistent, bristles basally connate.

2n

= 20.

Pluchea baccharis

Pluchea longifolia

Phenology Flowering Jun–Jul. Flowering Jun–Oct(–Nov).
Habitat Wet savannas, flatwoods, pond edges, borrow pits, ditches Brackish to fresh swamps, marshes, hammocks, lake shores, ditches, and canals
Elevation 0–20 m [0–100 ft] 0–10 m [0–0 ft]
Discussion

Pluchea baccharis has been reported from Arkansas; I have not seen a specimen.

Pluchea rosea var. mexicana R. K. Godfrey, endemic to inland gypseous-saline habitats in east-central Mexico, has been treated at specific rank (G. L. Nesom 1989).

The geographic ranges of Pluchea baccharis and P. foetida are nearly congruent and the taxa intergrade in morphology. The distinction between them is based primarily on corolla and phyllary color. Features of involucral vestiture also appear to be relatively constant. Head size and shape are not reliable diagnostic features.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Distribution
from FNA
AL; FL; GA; LA; MS; NC; SC; TX; Mexico; West Indies (Bahamas); Central America (Belize, Honduras, Nicaragua)
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[BONAP county map]
from FNA
FL
[BONAP county map]
Parent taxa Asteraceae > tribe Plucheeae > Pluchea Asteraceae > tribe Plucheeae > Pluchea
Sibling taxa
P. camphorata, P. carolinensis, P. foetida, P. longifolia, P. odorata, P. sagittalis, P. sericea, P. yucatanensis
P. baccharis, P. camphorata, P. carolinensis, P. foetida, P. odorata, P. sagittalis, P. sericea, P. yucatanensis
Synonyms Conyza baccharis, P. rosea
Name authority (Miller) Pruski: Sida 21: 2035. (2005) Nash: Bull. Torrey Bot. Club 23: 108. (1896)
Source Flora of North America vol. 19, p. 483. Flora of North America vol. 19, p. 484.
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