Collected and photographed by Dr. Carol Loeffler as https://www.inaturalist.org/observations/119010744, then sent to me for ID.
The site is a large sphagnum seep with Eurybia radula and other swamp vegetation. Trees include Acer rubrum, Pines strobus, Pinus rigida, Tsuga canadensis, Liriodendron tulipifera, Nyssa sylvatica, and others. There are nearby thickets of Kalmia latifolia and Rhododendron maximum.
Branch leaf 2.0 x 1.2mm, stem leaf 1.3 x 0.6mm