Charles Ellicott Commentary Isaiah 44:4

"and they shall spring up among the grass, as willows by the watercourses." — Isaiah 44:4 (ASV)

As willows. —The same word as in Psalms 137:2 and Isaiah 15:7. Botanists identify it with a species of Viburnum, which grows on the banks of streams, rather than with the “ weeping” or other species of Salix.