Pluchea yucatanensis

G. L. Nesom

Phytologia 67: 160. 1989.

Common names: Yucatan camphorweed
Introduced
Treatment appears in FNA Volume 19. Treatment on page 483. Mentioned on page 479.

Perennials, 20–60 cm; probably fibrous-rooted. Stems ± stipitate or sessile-glandular, otherwise glabrous. Leaves 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 subauriculate), margins serrulate, faces ± stipitate or sessile-glandular, otherwise glabrous or distalmost minutely puberulent. Heads in corymbiform arrays. Involucres turbinate to campanulate, 5–6 × 4–5 mm. Phyllaries pink to lavender or cream, proximally stipitate or sessile-glandular, distally densely stipitate-glandular (outermost ovatelanceolate, lengths usually 1 times inner, rarely only 0.5 times inner). Corollas pink to lavender or cream or pinkish to rosy. Pappi persistent, bristles distinct.


Phenology: Flowering late May–Aug.
Habitat: Low woods
Elevation: 0–10 m

Distribution

V19-813-distribution-map.gif

Introduced; Ala., Miss., Mexico, Central America (Belize)

Discussion

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.

Selected References

None.

Lower Taxa

None.
... more about "Pluchea yucatanensis"
sessile-glandular +  and stipitate +
villous +, strigose +, sericeous +, puberulent +  and arachnose +
glabrous +  and glabrate +
obtuse;rounded +
scarious +
ovate +  and lanceovate or linear +
indeterminate +  and determinate +
Guy L. Nesom +
G. L. Nesom +
not +  and clasping +
decurrent +
Undefined tribe Plucheinae +
compound +  and simple +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
oblong-obovate;oblong-oblanceolate or broadly lanceolate +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
ribbed;smooth +
Yucatan camphorweed +
pink +  and lavender or cream or pinkish +
oblong-cylindric +
Ala. +, Miss. +, Mexico +  and Central America (Belize) +
0–10 m +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Low woods +
indeterminate +
heterogamous +
each +  and sessile +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
turbinate;campanulate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
deltate +
denticulate +  and entire +
2-carpellate +
persistent +
Flowering late May–Aug. +
stipitate-glandular +
bearing subulate enations +, hairy +  and bristly +
flat;convex +
4 +  and 8 +
setiform +
exalbuminous +
Introduced +
appendaged +  and truncate +
papillate +
Compositae +
Pluchea yucatanensis +
species +
200 cm2,000 mm <br />2 m <br /> (500 cm5,000 mm <br />5 m <br />) +
20 cm200 mm <br />0.2 m <br /> (60 cm600 mm <br />0.6 m <br />) +
fibrous-rooted +  and taprooted +
200 cm2,000 mm <br />2 m <br /> (500 cm5,000 mm <br />5 m <br />) +
tree +, shrub +  and subshrub +