Ambrosia artemisiifolia

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Noun1.Ambrosia artemisiifolia - annual weed with finely divided foliage and spikes of green flowersAmbrosia artemisiifolia - annual weed with finely divided foliage and spikes of green flowers; common in North America; introduced elsewhere accidentally
ambrosia, bitterweed, ragweed - any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
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It does look very similar to ragweed, Ambrosia artemisiifolia, an American native which has made its way over here and is notable for its wind-blown pollen which is highly allergenic.
Biological flora of the British Isles: Ambrosia artemisiifolia.
A study of invasive Ambrosia artemisiifolia under different light availability also demonstrated that RGR remained unchanged at 100, 50 and 30% irradiance (QIN et al.
Tests conducted by an international team of researchers, led by physician-scientists at Johns Hopkins, showed that treatment with the pill, which contains the protein Ambrosia artemisiifolia major allergen 1, and is placed under the tongue to be absorbed, also reduced the need for anti-allergy drugs.
During Years 1-3 of the chronosequence the dominant plant species included the annuals Setaria faberi, Ambrosia artemisiifolia and biennials Daucus carota and Dipsacus fullonum.
Concretamente, los pliegos VIT 57060, VIT 57100 y VIT 57104, con material recolectado en Portugalete (Vizcaya); el pliego VIT 57099, procedente de Zorroza (Vizcaya), y el pliego SANT 17691, de Santona (Cantabria), pertenecen en realidad a la especie Ambrosia artemisiifolia.
2004) identificaron 51 compuestos en el aceite esencial obtenido de Ambrosia artemisiifolia recolectada en Belgrado (Republica de Serbia) sus principales componentes fueron: D-germacrene (24,1%), limoneno (16,83%), alfa-pineno (8,0%) y mircineno (7,4%), y observaron importante actividad bactericida y fungicida.
Hay-fever weed, Ambrosia artemisiifolia, is an annual, reproduces by seeds, develops 3 or more feet tall and is common throughout North America.