https://www.rhs.org.uk/plants/140320/salix-alba-var-vitellina-britzensis-nova/details
Salix alba var. vitellina 'Britzensis' nova | /RHS
salix alba varnovarhs
https://www.rhs.org.uk/plants/148226/salix-alba-var-caerulea-wantage-hall-(f)/details
Salix alba var. caerulea 'Wantage Hall' (f) | /RHS
salix alba var caeruleawantage hallfrhs