There is a herb called Santolina which is also known as 'Lavender Cotton' or 'Cotton Lavender' which shouldn't be confused with the real lavendar varieties. Santolina is often grown in herb gardens and is very attractive, but I don't think it has a culinary use, though I'm not sure if it is actually poisonous. According to Culpeper it can be used as a moth repellent though! Just thought it might be worth mentioning...