Here are some BLF growing at the NYBG, in Bronx NYC (Zone 7b. Most of these are found in the "Ladies Border", an experimental garden bed on the south side of the main conservatory. The "roster" of plants there is constantly changing, so there is always something to explore:
Tanyosho pine grove: OK not a BLE, but they are hands down the most beautiful pines I've ever seen. GORGEOUS. It takes forever to get them to that size and form though.
Lonicera fragantissima: It's supposed to be semideciuous, but as of Jan 14, it has kept all of its leaves and it was even blooming a little. A bit of a rambler though
Pinus palustris: There are several specimens of longleaf pine on the grounds. They seem to do well BUT they are not very pretty. They are young, thin trunked trees, and are mostly lanky and bare. Maybe when they are mature they're awesome.
Rhododendron pachysanthum: This one is pretty, the underside of the leaves is copper. However, it doesn't seem to be doing that well. It is located @ the azalea hill.
Rhododendron 'Seaview Sunset' I dont' know much about the parentage, but this 4ft shrub is so cute
Loropetalum chinense 'zhouzhou fucshia'. the small maroon leaves don't do much for me, but it's ok I guess
Mahonia belai and Yucca Rostrata. I've failed at growing those yuccas at home in coastal CT.. but the fact that they can grow them unprotected here gives me hope.
Prunus laurocerasus 'parkway' (Magnolifolia). It's HUGE and the leaves are just like Magnolia grandiflora. I love it.
Illicium henryi: This one I want to try at home