About Allium unifolium Kellogg
Allium unifolium, commonly known as the one-leaf onion or American garlic, is a North American wild onion species. It is native to the coastal mountain ranges of California, Oregon, and Baja California. It grows in clay soils including serpentine, at elevations that reach up to 1100 meters. Despite its common name referencing a single leaf, Allium unifolium usually produces 2 to 3 flat leaves, each growing up to 50 cm long. Its bulbs are typically solitary and egg-shaped, reaching up to 2 cm long. Bulbs most often form at the ends of rhizomes that spread outward from the parent plant. Its scapes are round in cross-section and can grow up to 80 cm tall. Its individual flowers reach up to 15 mm across; tepals are most often pink, and occasionally white. The anthers can be either yellow or purple. This plant has received the Royal Horticultural Society's Award of Garden Merit.
