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Relative of Chinese Rhubarb. Photo by H. Zell on Wikimedia Commons Rheum palmatum Common Name: Chinese Rhubarb. Family: Polygonaceae. Known Hazards: The leaves are poisonous. This report probably refers to high levels of oxalic acid found in the leaves. Perfectly safe in moderate quantities, oxalic acid can lock up certain . . . → Read More: Rhubarb Buckthorn Photo From US National Park Service invasive plants factsheet. Rhamnus cathartica Common Name: Common Buckthorn. Family: Rhamnaceae. Known Hazards: The fruit is purgative but not seriously poisonous. Other parts of the plant may also be poisonous. Habitats: Fen peat, scrub, hedges, ash and oak woods, on calcareous often dry . . . → Read More: Buckthorn Lesser Celandine by H. Zell on Wikimedia Commons Ranunculus ficaria Common Name: Lesser Celandine. Family: Ranunculaceae. Known Hazards: All parts of the plant are poisonous. The toxins are unstable and of low toxicity, they are easily destroyed by heat or by drying. The sap can cause irritation to the skin. . . . → Read More: Lesser Celandine Pelargonium Photo by Michael Wolfe http://commons.wikimedia.org/wiki/File:Pelargonium_sidoides_05.jpg Pelargonium sidoides Umckaloabo Pelargonium sidoides (Umckaloabo, South African Geranium) is a medicinal plant native to South Africa. Derivative inexpensive cold and flu medicines of various brands are widely available under the Umcka (“Umca” in Turkey) name. Studies have suggested that extracts from the plant could be used . . . → Read More: Pelargonium Paeony flower Photo by Ulf Eliasson on Wikimedia Commons Paeonia lactiflora Common Name: Chinese Peony. Family: Paeoniaceae. Synonyms: P. albiflora. P. edulis. Habitats: Dry open stony slopes, riverbanks and sparse woodland edges. Woods and grasslands at elevations of 400 - 2300 metres in China. Range: E. Asia - Siberia to Mongolia. . . . → Read More: Peony Evening Primrose Photo from http://commons.wikimedia.org/wiki/File:1_Oenothera_biennis.jpg Oenothera biennis Common Name: Evening Primrose. Family: Onagraceae. Synonyms: Onagra biennis. Habitats: Dunes, roadsides, railway banks and waste places in Britain, often in sandy soils. Range: Eastern N. America - Labrador, south to Florida and Texas. Naturalized in Britain. Physical Characteristics Oenothera biennis is a BIENNIAL growing to . . . → Read More: Evening Primrose |
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