Allium scorodoprasum
Encyclopedia
The Sand leek also known as Rocambole, is a perennial
Perennial plant
A perennial plant or simply perennial is a plant that lives for more than two years. The term is often used to differentiate a plant from shorter lived annuals and biennials. The term is sometimes misused by commercial gardeners or horticulturalists to describe only herbaceous perennials...

 wild onion
Allium
Allium is a monocot genus of flowering plants, informally referred to as the onion genus. The generic name Allium is the Latin word for garlic....

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It should not be confused with Rocambole garlic, which is A. sativum var. ophioscorodon.

According to garlic grower Ron Engeland, A. scorodoprasum is edible but seldom cultivated, and has a shorter flower stalk and fewer and more inconsistently shaped cloves than Rocambole garlic. Sand leek also has a dark violet bulb wrapper.

Elephant garlic
Elephant Garlic
Elephant garlic is a plant belonging to the onion genus. It is not a true garlic, but actually a variant of the species to which the garden leek belongs. It has a tall, solid, flowering stalk and broad, flat leaves much like those of the leek, but forms a bulb consisting of very large, garlic-like...

(properly A. ampeloprasum var. ampeloprasum) is also sometimes incorrectly sold as A. scorodoprasum.
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