PS. When the plants start dying back you may use shears to cut out the flower stalk only to tidy up the area. But do not cut the leaves. They produce sugars from sunlight and this sap must retract into the bulb giving it energy for next year's bloom. Later when they are totally dried down to the ground you may yank them sideways and they will break off to tidy up the area. Daffodils are treated the same way.

You are certainly welcome. I failed to mention that those other plants coming up with the hyacinths appear to have a narrower leaf so sit tight and see what may come up from those. I would suggest planting them out in another area away from that tree. Large trees can take up 250 gallons of water per day so anything growing under them will suffer.

Take pictures as things come up so that you can remember what you have when they are not blooming.

I believe that they are Hyacinthoides Hispanica.

Common name: Spanish Bluebells and Spanish Whitebells

I think the white ones are Galanthus, known as snowdrops.

Not Galanthus, snowdrops. Correctly IDed by angieg1.

Yes, I see now. angieg1 is indeed correct.

They're Hyacinthoides for sure. Whether or not they are H. hispanica specifically depends on particular details of their structure - it is not automatic that bluebells of this type seen in gardens are always H. hispanica. Many encountered could instead turn out to be H. x massartiana when checked.

So true (as I just leaned from you) Thanks for the information, Embothrium!

http://www.ukwildflowers.com/Web_pages/hyacinthoides_x_massartiana_hybrid_bluebell.htm