Allium procerum Trautv. ex Regel
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Allium giganteum Regel Ornamental onion
Giant onions are native to central Asia. They reach 3-5′ (91-152 cm) in height, and about 1½′ (45 cm) in width. It has large bulbs, 2-3″ (5-7.6 cm) in diameter. It is popular with gardeners for its stunning spherical purple-pink flowerheads three or four inches in diameter. Each flowerhead is supported by a smooth, cylindrical, unbranched stem. Identification: The flowerheads are unmistakable, white or pink, made up of hundreds of tiny, six-petaled flowers. If the plant is not in bloom, the leaves form a basal rosette looking a bit like thick blades of grass up to 1½′ (45 cm) long. Online References:
Plants for a Future, a resource and information centre for edible and otherwise useful plants
6/17/2012 · Coastal Maine Botanical Gardens, Boothbay, Maine · ≈ 1 × 1½′ (34 × 52 cm)
5/27/2016 · Acton Arboretum, Acton, Massachusetts
6/18/2012 · Ogunquit, Maine · ≈ 9 × 14″ (23 × 35 cm) Allium giganteum description by Thomas H. Kent, last updated 25 May 2020.
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6/29/2008 · MacDonalds, Westford, Massachusetts · ≈ 16 × 11″ (41 × 27 cm)
5/27/2016 · Acton Arboretum, Acton, Massachusetts
6/17/2012 · Coastal Maine Botanical Gardens, Boothbay, Maine · ≈ 1½ × 1′ (52 × 34 cm)
5/27/2016 · Acton Arboretum, Acton, Massachusetts
6/29/2008 · MacDonalds, Westford, Massachusetts · ≈ 1½ × 1′ (46 × 31 cm)
7/6/2007 · Holden, Massachusetts · By Philip A. Despo Range: Zones 5-8:
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ID is uncertain 
