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rosy camphorweed

stinking camphorweed

Yucatan camphorweed

Habit Perennials, 40–60 cm; fibrous-rooted, sometimes rhizomatous. Annuals or perennials, 40–100 cm; fibrous-rooted, sometimes rhizomatous. Perennials, 20–60 cm; probably fibrous-rooted.
Stems

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

(often dark purplish) arachnose, glandular.

± stipitate- or sessile-glandular, otherwise glabrous.

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).

sessile;

blades (thick, reticulate-veined) oblong to elliptic, lance-ovate, or ovate, mostly 3–10(–13) × 1–4 cm (bases clasping), margins denticulate (apices rounded to acute), faces minutely sessile-glandular.

sessile;

blades (leathery, slightly succulent, shiny) oblong-obovate to oblong-oblanceolate or broadly lanceolate, 3–5 × (0.6–)1.5–2 cm (bases subclasping and sub-auriculate), margins serrulate, faces ± stipitate- or sessile-glandular, otherwise glabrous or distalmost minutely puberulent.

Heads

in corymbiform arrays.

in loose to dense, corymbiform arrays.

in corymbiform arrays.

Involucres

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

usually cupulate to campanulate, sometimes turbinate-campanulate, 5–10 × 6–9(–12) mm (bases mostly rounded to impressed, sometimes obtuse).

turbinate to campanulate, 5–6 × 4–5 mm.

Corollas

rose-pink to purplish.

creamy white to yellowish or pale pink.

pink to lavender or cream or pinkish to rosy.

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).

usually creamy white, sometimes cream, greenish, pinkish, rose-purplish, purplish, yellowish, or pale pink, thinly arachnoid-pubescent and sessile-glandular (the outer ovate to ovate-lanceolate, lengths mostly 0.2–0.6 times inner).

pink to lavender or cream, proximally stipitate- or sessile-glandular, distally densely stipitate-glandular (outermost ovate-lanceolate, lengths usually 1 times inner, rarely only 0.5 times inner).

Pappi

persistent, bristles distinct.

persistent, bristles distinct.

persistent, bristles distinct.

2n

= 20.

Pluchea baccharis

Pluchea foetida

Pluchea yucatanensis

Phenology Flowering Jun–Jul. Late Jul–Oct (year-round in south). Flowering late May–Aug.
Habitat Wet savannas, flatwoods, pond edges, borrow pits, ditches Seasonally wet soil, pond and lake edges, ditches, borrow pits, swampy woods, bogs, other freshwater wetlands Low woods
Elevation 0–20 m [0–100 ft] 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.)

Pluchea foetida var. imbricata has not been treated as distinct from typical P. foetida by recent authors (e.g., A. Cronquist 1980; R. K. Godfrey and J. W. Wooten 1981; R. P. Wunderlin et al. 1996). Although plants similar to the type can be found scattered in Florida and Georgia, a populational integrity does not appear to occur, and intermediate forms exist. Nevertheless, field biologists should be aware of the putative distinctions of var. imbricata to make more critical observations regarding its status.

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

Pluchea yucatanensis apparently is native along the Gulf and Caribbean coasts of Mexico and Central America, most commonly on the Yucatan Peninsula and in Belize. In the United States, it is known from collections made from 1896 to 1969 in coastal Alabama and Mississippi; it appears to be naturalized in the flora.

Pluchea yucatanensis is similar in habit and general appearance to P. foetida and P. baccharis and has been identified as both; the rosy tinted phyllaries and florets are more similar to those of P. baccharis. The glabrous, slightly thickened, shiny leaves and glabrous phyllaries are recognition traits for the species.

(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)
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; DE; FL; GA; LA; MD; MO; MS; NC; NJ; OK; SC; TX; VA; Mexico; West Indies (Hispaniola)
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; MS; Mexico; Central America (Belize) [Introduced in North America]
[BONAP county map]
Parent taxa Asteraceae > tribe Plucheeae > Pluchea 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. longifolia, P. odorata, P. sagittalis, P. sericea, P. yucatanensis
P. baccharis, P. camphorata, P. carolinensis, P. foetida, P. longifolia, P. odorata, P. sagittalis, P. sericea
Subordinate taxa
P. foetida var. foetida, P. foetida var. imbricata
Key
1.Distalmost leaves triangular-ovate; heads in tight, rounded clusters at ends of branches; involucres turbinate-campanulate, 9–10 mm; phyllaries pink- ish to rose-purplishP. foetida var. imbricata
1.Distalmost leaves mostly oblong-elliptic; heads in paniculiform arrays of usually flat-topped cymiform clusters; involucres broadly campanulate, 5–8 mm; phyllaries cream to greenishP. foetida var. foetida
Synonyms Conyza baccharis, P. rosea Baccharis foetida, P. eggersii, P. foetida var. imbricata, P. imbricata, P. tenuifolia
Name authority (Miller) Pruski: Sida 21: 2035. (2005) (Linnaeus) de Candolle: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 5: 452. (1836) G. L. Nesom: Phytologia 67: 160. (1989)
Source Flora of North America vol. 19, p. 483. Flora of North America vol. 19, p. 482. Flora of North America vol. 19, p. 483.
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