Martha Stewart Living: Dandelion (Taraxacum) is a very common weed. “The taproot of this plant produces a basal rosette with irregularly toothed leaves that hold a white milky juice,” says Linda Langelo, horticulture specialist at Colorado State University. “The bright yellow flowers bloom in spring in the cooler parts of the season. The flowers turn into silvery white balls of fruit that have parachute-like appendages.”

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