The Apiaceae (formerly Umbelliferae) includes 347 genera and 2,786 valid species (The Plant List) distributed primarily in the temperate regions of the Northern Hemisphere. The family includes well-known plants such as anise, carrot, celery, coriander, dill, parsley, etc. These are mostly annual, biennial or perennial herbs, although some species are shrubs, small trees, and lianas. The stem may be hollow at the nodes. The leaves are dissected, trifoliate, pinnate, or simple. The flowers are radially symmetrical, with five petals, sepals, and stamens, and are arranged in terminal umbels (cymes). The petals are white, yellow, pink, or purple. The fruit (a schizocarp) is either wind or animal dispersed. Many species (including Pastinaca sativa and Heracleum mantegazzianum) produce phototoxic substances that sensitize human skin to sunlight causing a serious skin inflammation. Some species are cytotoxic, e.g., Cicuta spp., Conium spp., etc.

		Spotted Water-hemlock (Cicuta maculata)
		Wild Carrot (Daucus carota)
		Giant Fennel (Ferula communis)
		Coastal Plain Pennywort (Hydrocotyle bonariensis)
		Maryland Black-snakeroot (Sanicula marilandica)
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