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The species name, artemisiifolia, is given because the leaves were thought to bear a resemblance to the leaves of Artemisia, the true wormwoods. It has also been called the common names: American wormwood, bitterweed, blackweed, carrot weed, hay fever weed, Roman wormwood, short ragweed, stammerwort, stickweed, tassel weed.
Rudbeckia hirta is an upright annual (sometimes biennial or perennial) growing 30–100 cm (12–39 in) tall by 30–45 cm (12–18 in) wide.It has alternate, mostly basal leaves 10–18 cm long, covered by coarse hair, with stout branching stems and daisy-like, composite flower heads appearing in late summer and early autumn.
Aconitum (/ ˌ æ k ə ˈ n aɪ t əm /), [2] also known as aconite, monkshood, wolfsbane, leopard's bane, devil's helmet, or blue rocket, [3] is a genus of over 250 species of flowering plants belonging to the family Ranunculaceae.
The hypothesis that flower remedies are associated with effects beyond a placebo response is not supported by data from rigorous clinical trials. All randomized double-blind studies, whether finding for or against the solutions, have suffered from small cohort sizes but the studies using the best methods found no effect over placebo .
Medicago lupulina, commonly known as black medick, nonesuch, or hop clover, is a plant of dry grassland belonging to the legume or clover family. Plants of the genus Medicago , or bur clovers, are closely related to the true clovers ( Trifolium ) and sweet clover ( Melilotus ).
Solanum nigrum, the European black nightshade or simply black nightshade or blackberry nightshade, [1] is a species of flowering plant in the family Solanaceae, native to Eurasia and introduced in the Americas, Australasia, and South Africa.
Petioles and flowers can also be infected, but the disease is primarily seen in the leaves. The symptoms become visible in the spring and worsen with time. [30] The small black fruiting bodies which carry the spores, pycnidia, are formed in the dead cells of the leaf spots. The spores are mainly spread by water, wind, and wind-blown rain.
Staminate flower heads have stamens surrounded by whitish or purplish florets. Pistillate flower heads have fruit-yielding ovules surrounded by many phyllaries and fewer, smaller florets. [2] The pistillate flowers are wind pollinated, [9] [10] and the fruits develop. They are burs, sometimes adorned with knobs, wings, or spines. [2]