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Flaveria trinervia is a species of flowering plant in the family Asteraceae known by the common names clustered yellowtops, [2] speedyweed, [2] and yellow twinstem. [2] It is native to parts of the Americas, including the southeastern and southwestern United States (Florida, Texas, Arizona, New Mexico), [3] most of the Bahamas, Mexico, Belize, and parts of the Caribbean, [4] especially Cuba ...
Goldenseal (Hydrastis canadensis), also called orangeroot [2] or yellow puccoon, [2] is a perennial herb in the buttercup family Ranunculaceae, native to North America. It may be distinguished by its thick, yellow knotted rootstock .
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The plant commonly grows in dry to moderately moist soils, in prairies, woodlands, and the edges of roads. It seldom grows in sandy soils. [6]In the United States, it is native from Nebraska to the west, Texas to the south, New York to the east, and the Canadian border to the north.
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Others, however, continue to treat them as separate genera, and we provisionally treat them as such here pending further research. [2] [12] Species [2] [13] Anthoxanthum aethiopicum - Ethiopia; Anthoxanthum amarum - Spain, Portugal; Anthoxanthum aristatum - Mediterranean and neighboring areas from Madeira and the Canary Islands to the Aegean
The head contains a few yellow ray florets, which are pistillate, and up to 25 or more yellow disc florets, which are bisexual. The fruit is a rough-textured, pyramidal or prism-shaped cypsela up to a centimeter long including its pappus of many barbed white bristles.
A highly variable plant, taking many forms, E. guttata is a species complex in that there is room to treat some of its forms as different species by some definitions. [9] The plant ranges from 10 to 80 centimetres (4 to 31 + 1 ⁄ 2 in) tall with disproportionately large, 2 to 4 cm long, tubular flowers. The perennial form spreads with stolons ...