more spiraeas: https://3dsky.org/collection/shared/5082566 
autumn collection: https://3dsky.org/collection/shared/5081087 
Height:
Spiraea_betulifolia_autumn_0101 – 1.1 m
Spiraea_betulifolia_autumn_0102 – 0.95 m
Spiraea_betulifolia_autumn_0103 – 1.1 m
Spiraea_betulifolia_autumn_0104 – 0.85 m
Polygons:
Spiraea_betulifolia_autumn_0101 – 159 065
Spiraea_betulifolia_autumn_0102 – 202 563
Spiraea_betulifolia_autumn_0103 – 163 427
Spiraea_betulifolia_autumn_0104 – 76 285