Pluchea sagittalis |
Pluchea yucatanensis |
|
---|---|---|
wing-stem camphorweed |
Yucatan camphorweed |
|
Habit | Perennials, 50–200 cm; fibrous-rooted. | Perennials, 20–60 cm; probably fibrous-rooted. |
Stems | minutely hirtellous to strigillose and sessile-glandular (winged by decurrent leaf bases). |
± stipitate- or sessile-glandular, otherwise glabrous. |
Leaves | sessile; blades usually lanceolate to lance-elliptic (proximal sometimes spatulate or oblanceolate), mostly 5–15 × 1–3(–4) cm, margins shallowly and closely toothed, faces minutely hirtellous to strigillose and 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. |
Involucres | hemispheric to cupulate, 4–7 × 8–10 mm. |
turbinate to campanulate, 5–6 × 4–5 mm. |
Corollas | white or rose-purple. |
pink to lavender or cream or pinkish to rosy. |
Phyllaries | greenish to cream, ± stipitate-glandular (outer oval-oblong to linear-attenuate). |
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). |
Heads | in corymbiform arrays. |
in corymbiform arrays. |
Pappi | persistent, bristles distinct. |
persistent, bristles distinct. |
2n | = 20. |
|
Pluchea sagittalis |
Pluchea yucatanensis |
|
Phenology | Flowering Jul–Aug. | Flowering late May–Aug. |
Habitat | Moist or wet, open habitats, ballast deposit areas | Low woods |
Elevation | 0–10 m (0–0 ft) | 0–10 m (0–0 ft) |
Distribution |
AL; FL; South America; West Indies [Introduced in North America] |
AL; MS; Mexico; Central America (Belize) [Introduced in North America] |
Discussion | Pluchea sagittalis is adventive, probably a waif; it was collected as a ballast weed by C. Mohr near Mobile (1891, 1894, 1896) and by A. H. Curtiss near Pensacola (1886, 1901). (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.) |
Source | FNA vol. 19, p. 480. | FNA vol. 19, p. 483. |
Parent taxa | Asteraceae > tribe Plucheeae > Pluchea | Asteraceae > tribe Plucheeae > Pluchea |
Sibling taxa | ||
Synonyms | Conyza sagittalis, P. quitoc, P. suaveolens | |
Name authority | (Lamarck) Cabrera: Bol. Soc. Argent. Bot. 3: 36. (1949) | G. L. Nesom: Phytologia 67: 160. (1989) |
Web links |