There's a low lying area on my property with lots of impenetrable shrubby willows growing in the sun, along with sensitive ferns, marsh marigolds, and poplar. The growing zone is USDA 5b but in this dip it's probably closer to 4. Soil is clay-ey. The willows grow approximately 20' high. (I should have taken a leaf closeup last summer... unfortunately, didn't.) The upper branches appear reddish in winter when viewed from a distance, but not as bright as red osier dogwood.
I'm curious if these willows are native and if they're useful to wildlife or to me, and what I should look for when it comes to differentiating willow shrubs. Any ideas what species or kind these willows are?
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