for grouping, [295]

Spice bush, [478]

Spindle tree, [5], [7]

Spiræa, [35], [174], [452]-[454];

arguta, [256];

betulifolia, [35], [452];

Douglasi, [35], [453];

Foxii, [35];

japonica, [35], [256], [453];

Margaritæ, [35];