Difference between revisions of "Emex spinosa"
Monogr. Rumex, 58. 1819.
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|publication year=1819 | |publication year=1819 | ||
|special status=Weedy;Introduced | |special status=Weedy;Introduced | ||
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|subfamily=Polygonaceae subfam. Polygonoideae | |subfamily=Polygonaceae subfam. Polygonoideae | ||
|genus=Emex | |genus=Emex | ||
Latest revision as of 22:07, 5 November 2020
Plants 3–6(–8) dm. Stems ascending to erect, base often reddish, branched proximally. Leaves: ocrea loose, glabrous; petiole 2–29 cm, glabrous; blade ovate to ovate-oblong or triangular, 3–13 × 1.1–12 cm, base mostly truncate to subcordate, apex obtuse to acute. Staminate flowers 1–8 per ocreate fascicle; tepals narrowly oblong to oblanceolate, 1.5–2 mm. Pistillate flowers 2–7 per ocreate fascicle; outer tepals ovate to oblong, 4–6 mm in fruit, inner tepals linear-lanceolate, 5–6 mm in fruit, apex acute. Fruiting perianths 5–6 × 5–6 mm, spines spreading to reflexed, 2–4 mm, base broad. Achenes 4–5 × 2–3 mm, shiny. 2n = 20.
Phenology: Flowering year-round.
Habitat: Sandy shores, disturbed ground
Elevation: 0-500 m
Distribution
Introduced; Calif., Fla., Mass., N.J., Tex., South America (Argentina, Ecuador, Peru), Eurasia (Mediterranean region), n Africa (Mediterranean region), introduced in Eurasia (Cyprus, India, Iran, Iraq, Israel, Lebanon, Pakistan, Syria, Turkey), Africa (Algeria, Kenya, Kuwait, Mauritius, Morocco), Atlantic Islands (Canary Islands), Pacific Islands (Hawaii), Australia.
Discussion
Selected References
None.