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V. encelioides is an annual herb growing up to 150 cm high. Stems are densely short-hairy with mostly alternate leaves. Stems are 20-100 cm long. Leaf blades are lanceolate to triangular-ovate, bases broadly cuneate to truncate, dull green, 3-veined, with a coarsely dentate margin, and strigose-canescent hairs. The peduncle is subtended by leaf-like bracts. The inflorescence has 1-many heads with 1-2 phyllary series, 6-10 mm, and linear-lanceolate to linear. Chaff scales 6 to 8 mm and abruptly acuminate. Ray flowers are orange-yellow and disk flowers are yellow to light brown. Disk achenes are 4 to 6.5 mm, obovate, flattened, and with wide wing (Baldwin et al., 2012).

Recoginition


One obvious character found on V. encelioides achenes are wings which can be used for identification (Coleman, 1966, 1974;Baldwin et al., 2012). For a description of the species with images refer to Feenstra and Clements (2008).

Related invasive species

  • Verbesina encelioides

Related Farm Practice

  • Light
Impact

V. encelioides is a native annual herb in the USA and Mexico, but there exists controversy as to its native status in South America. It has expanded its range into Europe, Asia, Africa and Australia. Cause and timing of initial introductions are mostly unknown. It is considered invasive in the northern Hawaiian Islands due to the displacement of native plant species and the negative impacts it has on breeding colonies of marine birds. It is a dominant invasive on Midway Atoll (PIER, 2013). V. encelioides also invades agricultural crops, especially peanuts, in the United States, Argentina, Australia and India, where allelopathy may provide interference. When grazed upon by livestock (sheep and cattle), animals become lethargic or may die due to the toxin galegine in the plant.

Has Cabi datasheet ID
20396
Oss tagged
x

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