Salix sepulcralis group Salix sepulcralis group The "Salix sepulcralis" group is a cultivar group containing all cultivars of hybrids between "Salix alba" and "Salix babylonica". The "sepulcralis" or × "sepulcralis" trees are sometimes referred to as white weeping willow or glaucous weeping willow in reference to the mixed appearance from the parent species. It was first described by L. Simonkai in 1890 from trees growing in Romania. The group contains both weeping and nonweeping cultivars, though the best-known of its cultivars is 'Chrysocoma', the most widely grown weeping tree.. Some of the cultivars are hybrids of "S. babylonica" var. "matsudana" 'Tortuosa' and have
Salix brachycarpa The plant produces tiny, downy seeds which are viable for just a few days but may germinate within 12 hours of hitting a suitable substrate. There are at least two recognized varieties of this species of willow: A former subspecies, "Salix brachycarpa" subsp. "niphoclada", is now synonymous with "Salix niphoclada", another Alaskan willow species that is also commonly referred to as barren-ground willow. Of note, barren-ground willow is also the common name of a third but distinct species of willow found in Alaska, "Salix nummularia". On the Alaska North Slope, sites that supported this and other low-growing willow species before