There is quite a bit of confusion over the term Scallion. In early literature it seems to refer to the Shallot but by the 17th century the meaning shifts to mean the tops of bulb onions or thinnings or offsets of bulb onions or, perhaps, a small variety of the Welsh Onion (Allium fistulosum). Scallions today are understood to be one of the smaller varieties of Welsh or Bunching Onion. This confusion starts with some the earliest written records of vegetable plants. Pliny (23-79 CE) records in the Natural History that: “The scallion has hardly any head at all only a long neck, and consequently it all goes to leaf, and is cut back several times, like common leek.” This could possibly be the Welsh Onion. He also writes that this Onion is propagated from seeds rather than divisions, which would lead one to believe that this was not a reference to a shallot which is propagated almost exclusively from bulbs.
The origin of the Onion (Allium cepa) has been long debated but the original culinary bulb probably arises in central Asia or the Near East. The current genus name, Allium comes from the Celtic “All,” meaning pungent, the species name, cepa, is from the Roman “cepae,” or onion. The common name onion seems to come from the Latin “Unio,” or one, signifying that the bulb is of one unit.
As many writers have observed over the centuries, the Egyptians had a particular fondness for onions. They are pictured on the interior walls of the pyramid of Unas (c. 2400 BCE), the pyramid of Pepi II (c. 2200 BCE) and King Ramses IV, who died in 1160 BCE, had onions placed in his eye sockets.
from onions… a scallion is a baby onion.
Link below has some info on heirloom scallions:
Welsh Onion/Scallion
There is quite a bit of confusion over the term Scallion. In early literature it seems to refer to the Shallot but by the 17th century the meaning shifts to mean the tops of bulb onions or thinnings or offsets of bulb onions or, perhaps, a small variety of the Welsh Onion (Allium fistulosum). Scallions today are understood to be one of the smaller varieties of Welsh or Bunching Onion. This confusion starts with some the earliest written records of vegetable plants. Pliny (23-79 CE) records in the Natural History that: “The scallion has hardly any head at all only a long neck, and consequently it all goes to leaf, and is cut back several times, like common leek.” This could possibly be the Welsh Onion. He also writes that this Onion is propagated from seeds rather than divisions, which would lead one to believe that this was not a reference to a shallot which is propagated almost exclusively from bulbs.
The origin of the Onion (Allium cepa) has been long debated but the original culinary bulb probably arises in central Asia or the Near East. The current genus name, Allium comes from the Celtic “All,” meaning pungent, the species name, cepa, is from the Roman “cepae,” or onion. The common name onion seems to come from the Latin “Unio,” or one, signifying that the bulb is of one unit.
As many writers have observed over the centuries, the Egyptians had a particular fondness for onions. They are pictured on the interior walls of the pyramid of Unas (c. 2400 BCE), the pyramid of Pepi II (c. 2200 BCE) and King Ramses IV, who died in 1160 BCE, had onions placed in his eye sockets.
a scallion is an immature onion. there are seed pods in the green growth on the top of onions.