The tree that's called mimosa is Albizia julibrissin which I linked to above. Mimosa the genus (some examples are Mimosa pudica and Mimosa strigillosa which norska mentions) is for the most part smaller plants (at least all the ones that are commonly found).
Actually if you grow them in an open lawn, away from flower beds with exposed soil, the seeds can be ground up and not a problem as my tree is situated in this manner. They are also know as a Silk Tree. I thought I read somewhere the are native to Turkey or Iran????? not native to the states i think.
No, they're an introduced species here. Quite a problem in some areas of the country--you may be able to manage seedlings right next to your tree, but seeds have a way of spreading beyond the immediate area of the tree too, so you probably don't see most of its babies. Unless you're deadheading the flowers before they set seed (quite tricky to do on a large tree!) it could be spreading and you don't even realize it.
Hi mtor, we also call it the Silk Tree, I have to grow it as a conservitory plant indoors, but it has got too large for that so now I have put them (2 from seeds) outdoors for the summer, I will try protect them outdoors over the winter to see if I can grow them that way, I get a wonderful perfume off the flowers also, the seed packet said Albizia Silk Tree, I got red spidermite 2/3 years ago and they lost all their leaves as fast as lightening, but got rid of the mites and they recovered, so far so good outdoors but will keep a close eye on them. Happy gardening, Weenel.
My neighbor has this tree in her front lawn. Definitely a Mimosa. WeeNeel, if the Mimosa can live for years here in my zone 5 I am sure that you can keep them where ever you are! I first saw this tree when I lived overseas in Japan. The smell is wonderful when there are blooms.
Hi Cabrlmo, thanks about your zone info, I am going to try leave these two trees outdoors as I just cant keep them inside any longer, I grew them from seed about 8 years ago, and to be honest, they have been restricted due to keeping them in large pots, I may have to give them a bit of protection for the first winter depending how severe it gets, UK winters can have 4 seasons in the one day, my prob is I live on the coast, right on the water atop a cliff, so it is wind burn along with salt icey blasts that burn my plants more than anything, but I am one of these gardeners, if a plant is going to survive, even with a little care, then it will, if it dont, then it was never meant to grow in my conditions, so keep fingers crossed for these lovely trees, they are not common hear so it will be a real experiment. happy gardening. WeeNel.