Category Archives: Noxious Weeds

Bur Buttercup Fruits

Bur buttercup (Ceratocephalus testiculatus, formerly Ranunculus testiculatus) is one of our earliest wildflowers to bloom, appearing immediately after the snow melts. It is also very short-lived. Once it appears, it is only days before the fruits are mature and the … Continue reading

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Redclaws

Redclaws (Escallonia rubra) is native to Chile and Argentina. This shrub is used as an ornamental throughout the world. In North America it has naturalized along the coast in Oregon and Northern California. Tolerant of salt spray, redclaws is found … Continue reading

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Bull Thistle

Due to its size, spines and rapid spread, bull thistle (Cirsium vulgare) is considered an aggressive weed or noxious plant. Its seeds are wind dispersed, are viable for over ten years and each plant can produce over 10,000 seeds with … Continue reading

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Wild Radish

Wild radish (Raphanus raphanistrum) is a close relative of cultivated radishes, belonging to the same genus. Some sources give the domestic radish a different species designation (sativus) while others consider it to be a subspecies of R raphanistrum. Either way, … Continue reading

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Jupiter’s Beard

Jupiter’s beard (Centranthus ruber) is native to Southern Europe and North Africa. Planted as an ornamental it has naturalized and grows wild in Europe, the West Coast of the United States and Hawaii. A perennial, Jupiter’s beard is bushy, well-branched, … Continue reading

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