Fig. 42. S. humilis whose seeds produced hybrid plants (Stony Brook Reservation, Boston, 24 June 2008)

Fig. 43. A close-up view of the same shrub (Stony Brook Reservation, Boston, 24 June 2008)

Fig. 44. Hybrid progeny of S. humilis shown above: a general view of two shrubs (Arnold Arboretum, 23 June 2008)

Fig. 45. A close-up view of one of the shrubs with a coarse, branching single trunk (Arnold Arboretum, 23 June 2008)

Fig. 46. 'Wavy' bark of the hybrid willow typical for S. atrocinerea (Arnold Arboretum, 10 April 2008)

Fig. 47. A pistillate ament of the hybrid willow looking similar to aments of S. humilis (Arnold Arboretum, 23 April 2008)

Fig. 48. A branchlet of the hybrid willow (Arnold Arboretum, 23 June 2008)