Pluchea baccharis
Pluchea carolinensis
rosy camphorweed
cough bush, cure-for-all, sourbrush, sourbush, wild tobacco
puberulent to sparsely villous and stipitate- to sessile-glandular (sometimes viscid).
matted-villous with viscid, vitreous hairs, proximally glabrescent, not evidently glandular.
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).
petiolate (petioles 10–40 mm);
blades (thickish, strongly bicolor) elliptic to oblong-obovate or ovate, 5–16(–20) × 2–6(–8) cm, margins entire or denticulate (teeth callous-tipped), abaxial faces moderately or sparsely matted-villous to crinkly-puberulent, adaxial (green) glabrate.
campanulate to turbinate-campanulate or turbinate, 4–6 × 5–9 mm (bases obtuse to barely acute).
broadly campanulate to cupulate, 4.5–6 × 5–10 mm.
rose-pink to purplish.
whitish to pink-lavender.
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).
greenish to creamy or tan, sometimes slightly purple, glandular-tomentose.
in corymbiform arrays.
in dense, corymbiform arrays (held beyond the leaves, axes minutely bracteate, bracts abruptly differentiated from cauline leaves).
persistent, bristles distinct.
tardily falling, bristles distinct.
= 20.
= 20.
Pluchea baccharis
Pluchea carolinensis
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.)
Pluchea carolinensis is naturalized in the Hawaiian Islands and other Pacific Islands.
The names Pluchea odorata of authors, not (Linnaeus) Cassini, and P. symphytifolia of authors, not Conyza symphytifolia Miller in the sense of W. T. Gillis (1977), have been used for plants here called Pluchea carolinensis. The taxon was long identified as P. odorata (R. K. Godfrey 1952) and was known as P. [Conyza] symphytifolia (Miller) Gillis for a while. Conyza symphytifolia Miller is a synonym of Neurolaena lobata (Linnaeus) Cassini (R. Khan and C. E. Jarvis 1989).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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