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Helleborus net necrosis virus (HeNNV), also known as Hellebore black death, is an RNA virus that can cause serious disease in Hellebore plants by stunting or deforming the plant as it grows. The disease marks the leaves of the hellebores with black streaks, often following the veins of the leaf, and creating ring patterns.
Black hellebore was used by the ancients to treat insanity, melancholy, gout and epilepsy. [14] It is also toxic, causing tinnitus , vertigo , stupor, thirst, a feeling of suffocation, swelling of the tongue and throat, emesis and catharsis , bradycardia (slowing of the pulse ), and finally collapse and death from cardiac arrest . [ 12 ]
Veratrum nigrum, the black false hellebore, [2] [3] is a widespread Eurasian species of perennial flowering plant in the family Melanthiaceae. [1] [4] Despite its common name, V. nigrum is not closely related to the true hellebores, nor does it resemble them. The plant was widely known even in ancient times.
abandonment, loss, separation, death and the cycle of rebirth. It's commonly referred to as the Flower of Death white: Positive nature, new beginnings, good health and rebirth yellow: Happiness, light, wisdom, gratitude, strength, everlasting friendship pink: Feminine love, beauty and passion Spiderwort "Esteem not love"; [5] transient ...
One of the worst plagues in history, the Black Death arrived on the shores of Europe in 1347. Five years later, around 25 to 50 million people were dead across the continent.
Veratrum plants contain highly toxic steroidal alkaloids (e.g. veratridine) that activate sodium ion channels and cause rapid cardiac failure and death if ingested. [9] 2-Deoxyjervine is also found in these plants and is known to induce holoprosencephaly and cyclopia. [10]
Helleborus orientalis, the Lenten rose, [1] is a perennial flowering plant and species of hellebore in the buttercup family, Ranunculaceae, native to Greece and ...
Theories of the Black Death are a variety of explanations that have been advanced to explain the nature and transmission of the Black Death (1347–51). A number of epidemiologists from the 1980s to the 2000s challenged the traditional view that the Black Death was caused by plague based on the type and spread of the disease.
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