Salix babylonica but beyond China, it has not generally been as successfully cultivated as some of its hybrid derivatives, being sensitive to late-spring frosts. In the more humid climates of much of Europe and eastern North America, it is susceptible to a canker disease, willow anthracnose ("Marssonina salicicola"), which makes infected trees very short-lived and unsightly. "Salix babylonica" (Babylon willow) has many cultivars, including: Various cultivars of "Salix matsudana" (Chinese willow) are now often included within "Salix babylonica", treated more broadly, including: Yet other weeping willow cultivars are derived from interspecific "Salix" hybrids, including "S. babylonica" in their parentage. The most widely
Salix triandra other willows having two or five stamens. The scientific name derives from the male flowers having three stamens. The English common name refers to the similarity in leaf shape to almond leaves. The variety "Salix triandra" var. "hoffmanniana" Bab., found in Great Britain, is distinguished by being smaller (rarely over tall) and densely branched, with smaller leaves 2–7 cm long and 1-2.5 cm wide not glaucous below. It is not considered distinct by all authorities, particularly on continental Europe, so its range outside Britain, if any, is not reported. "Salix triandra" readily forms natural hybrids with "Salix viminalis", the hybrid