Pluchea baccharis
Pluchea camphorata
rosy camphorweed
camphor pluchea, camphor weed, plowman's-wort
puberulent to sparsely villous and stipitate- to sessile-glandular (sometimes viscid).
minutely puberulent and sessile-glandular, usually also closely arachnose (hairs appressed).
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 10–20 mm);
blades elliptic to oblong-elliptic, 6–15 × 3–7 cm, margins dentate-serrate or entire, faces glandular-puberulent or puberulent and sessile-glandular.
campanulate to turbinate-campanulate or turbinate, 4–6 × 5–9 mm (bases obtuse to barely acute).
campanulate, 4–6 × 3–4 mm.
rose-pink to purplish.
rose purplish.
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).
usually cream, sometimes purplish, minutely sessile-glandular (the outer also sparsely puberulent), sometimes glabrate.
in corymbiform arrays.
in paniculiform arrays (of rounded-convex, corymbiform clusters terminating branches from distal nodes, arrays usually resulting from axillary, strongly ascending, bracteate branches, the central axis longest and first to flower and, rarely, the only component of an array).
persistent, bristles distinct.
persistent, bristles distinct.
= 20.
Pluchea baccharis
Pluchea camphorata
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 camphorata is similar to P. odorata and rarely may hybridize with it. In P. camphorata, the phyllaries of the inner 2–3 series are thin and nearly translucent, lanceolate, and more than twice as long as deltate-ovate phyllaries of the outer series. The inner may be glandular but they are otherwise glabrous, prominently different in vestiture from the outer. The phyllaries of P. odorata are more strongly graduated and the inner are glandular and also clearly puberulent as well.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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