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 humboldtiana Salix humboldtiana Salix humboldtiana, the Humboldt's willow, is a tree species of willow native to North and South America, growing along watercourses. The species is evergreen or deciduous, depending on climate. It can grow up to 25 meters tall, with a narrow triangular or columnar crown shape. The trunk has a maximum d.b.h. of 80 cm and dark brown to gray fissured bark. Narrow lanceolate leaves up to 15 cm long, with serrate margin and light green color, in temperate climates, it turns yellow in autumn. Catkins 4–10 cm long; male flowers yellowish green, with an ovate-lanceolate bract, six stamens;