..а он у нас весь var. laevigatus ?

Young twigs glabrous; leaves usually glabrous, varying to sparsely pilose on the lower surface ; the larger fruits usually 1-1.5 cm. in diameter when fully mature, in terminal and axillary glomerules; shrub 1-3 m. tall, rarely smaller in dry habitats; indigenous west of the Continental Divide; introduced into eastern North America ... S. rivularis [= var. laevigatus] -- Young twigs finely crisp-puberulent ; leaves usually densely short-pilose, prominently reticulate, and pale green or glaucous beneath; mature fruits 6-10 mm. in diameter, in pairs or solitary in the upper axils ; shrub 20-80 cm. tall; east of the Continental Divide Low diffuse or trailin .... S. albus https://www.jstor.org/stable/43780945?seq=1#page_scan_tab_contents The characters of glabrous leaves and young shoots, large berries, and erect habit used to separate var. laevigatus from var. albus do not seem to be constant. https://www.jstor.org/stable/43781551?seq=1#page_scan_tab_contents Надо смотреть на растения.