Sorbus rupicola
- Several photographs of Rock Whitebeam on the Isle of Skye, and its description.
- http://www.plant-identification.co.uk/skye/rosaceae/sorbus-rupicola.html

Rowan: Sorbus Aucuparia
- Photographs of this tree, its fruit, bark, leaves and inflorescence.
- http://www.plant-identification.co.uk/skye/rosaceae/sorbus-aucuparia.htm

Sorbus scopulina
- Image and description of Cascade Mountain Ash from Washington state, USA.
- http://www.cwnp.org/photopgs/sdoc/soscopulina.html

Sorbus sitchensis
- Information on distribution and occurrence, value and use, characteristics, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/shrub/sorsit/

Mountain Ash
- Short description and medicinal uses of Sorbus aucuparia.
- http://www.botanical.com/botanical/mgmh/a/ashmo076.html

Sorbus americana
- Information on distribution and occurrence, value and use, characteristics, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/sorame/