EIGHTEEN ALIEN TAXA FROM NORTHEASTERN MINNESOTA: FIRST OLLECTIONS FOR THE STATE, REGION, OR CONTINENT

摘要

Significance of the Report. First report of this cultigen from outside of cultivation in the Great Lakes region. Previous Knowledge. Walking onion, also known as Egyptian onion, top onion, or tree onion, is an herbaceous perennial derived by horticultural crossing of the parent species, onion and bunching onion (Maass 1997; Kim et al. 2003), respectively, which are themselves known only in, or escaped from, cultivation (Stearn 1980). The name Allium ×proliferum has been used frequently, but its acceptance is unresolved (The Plant List 2013). The plants produce small bulbs in the inflorescence, and these winter-hardy bulbs may be planted in autumn (Jones and Mann 1963) or spring to grow into scallions. The bulbs may also be pickled. The plants usually do not develop seeds or large basal bulbs. If not harvested, the growing mass of bulbs tends to bend the stem to a reclined position, whereupon some of the bulbs may root and establish, enabling the clone to "walk" across the ground. Allium cepa × A. fistulosum was introduced into North America from Eurasia for culinary use. Although this hybrid was reported from outside of cultivation in Missouri and some New England states by Kartesz (2015), it was not included in the Flora of North America treatment by McNeal and Jacobsen (2002).