In the US, what most people actually think about when they read the terms "spring onions", "green onions", and/or "scallions" are the long, skinny, green things that don't really have a bulb. Technically, these are "scallions".
"Green onions" and/or "Spring Onions" are bigger, and actually do have a bulb. We are using them at the club I work at lately. These come in two varieties, red and white. If these were allowed to mature fully, they would become red and white onions.
If I can ever find where my kids keep hiding my ^&*(&^%$ digital camera, I'll take it in to work and show you the difference.
Peace, Love, and Vegetable Rights!
Eat Meat and Save the Plants!