
Appearance
"Allium sphaerocephalon" produces egg-shaped bulbs. Small bulblets are present under the outer layer of the stem. Flowers are borne on a scape up to 50 cm in height, in a spherical to egg-shaped umbel, 1–6 cm in diameter, tightly packed with many flowers crowded together. The relatively small size of the umbel relative to the height of the stem makes this one of those described as 'drumstick alliums'. Individual flowers are reddish-purple and are occasionally replaced by bulbils.
Distribution
"Allium sphaerocephalon" is found in the wild across all parts of Europe except in the northern and western countries. Its native range extends to northern Africa and to western Asia as far east as Iran. It is also reportedly naturalised in New York State, US. In England it grows wild only in the Avon Gorge so is known locally as the Bristol onion.References:
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