Galinsoga sp. Galinsoga sp.  

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A Galinsoga species blooming in Worcester Co., Maryland (8/31/2013). This is probably Galinsoga quadriradiata (Shaggy Soldier) or Galinsoga parviflora (Lesser Peruvian Daisy), which are native to Central and South America. These two species are very similar to each other in appearance and they prefer similar disturbed habitats. To distinguish them, the achenes of their ray florets should be examined. For the Peruvian Daisy, the pappus of such achenes consists of a crown of membranous scales, while the pappus of such achenes for the Lesser Peruvian Daisy is either absent or barely visible. (A 10x hand lens should be used to make this distinction.) Photo by Bill Hubick. (MBP list)

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