Allium fistulosum
Allium fistulosum, the Welsh onion, also commonly called bunching onion, long green onion, Japanese bunching onion, and spring onion, is a species of perennial plant, often considered to be a kind of scallion.
| Welsh onion | |
|---|---|
| Allium fistulosum at a farm | |
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Amaryllidaceae |
| Subfamily: | Allioideae |
| Genus: | Allium |
| Subgenus: | A. subg. Cepa |
| Species: | A. fistulosum |
| Binomial name | |
| Allium fistulosum | |
| Synonyms | |
| |
| Nutritional value per 100 g (3.5 oz) | |
|---|---|
| Energy | 142 kJ (34 kcal) |
6.5 g | |
| Sugars | 2.18 g |
| Dietary fiber | 2.4 g |
0.4 g | |
Protein | 1.9 g |
| Vitamins | Quantity %DV† |
| Thiamine (B1) | 4% 0.05 mg |
| Riboflavin (B2) | 7% 0.09 mg |
| Niacin (B3) | 3% 0.4 mg |
| Pantothenic acid (B5) | 3% 0.169 mg |
| Vitamin B6 | 4% 0.072 mg |
| Folate (B9) | 4% 16 μg |
| Vitamin C | 30% 27 mg |
| Vitamin E | 3% 0.51 mg |
| Vitamin K | 161% 193.4 μg |
| Minerals | Quantity %DV† |
| Calcium | 4% 52 mg |
| Iron | 7% 1.22 mg |
| Magnesium | 5% 23 mg |
| Manganese | 6% 0.137 mg |
| Phosphorus | 4% 49 mg |
| Potassium | 7% 212 mg |
| Sodium | 1% 17 mg |
| Zinc | 5% 0.52 mg |
| †Percentages estimated using US recommendations for adults, except for potassium, which is estimated based on expert recommendation from the National Academies. | |
The species is very similar in taste and odor to the related common onion, Allium cepa, and hybrids between the two (tree onions) exist. A. fistulosum, however, does not develop bulbs, and possesses hollow leaves (fistulosum means "hollow") and scapes. Larger varieties of A. fistulosum, such as the Japanese negi, resemble the leek, whilst smaller varieties resemble chives. A. fistulosum can multiply by forming perennial evergreen clumps. It is also grown in a bunch as an ornamental plant.
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