nfw28's picture

Unidentified tree

Observed: 29th May 2013 By: nfw28nfw28’s reputation in Plants
Species interactions

No interactions present.

Species with which Swedish Whitebeam (Sorbus intermedia) interacts


nfw28's picture

Rarity of Sorbus pseudofennica

Is this species of tree nationally rare in the UK?

landgirl's picture

Sorbus pseudofennica

Only found on Arran, according to Wikipedia.
Edit: and according to Stace 3.

lavateraguy's picture

Sorbus pseudofennica ...

... in the wild is restricted to a few (2, if I recall correctly) glens on the Isle of Arran. There are records from 7 tetrads, but only from 4 this century.

It is cultivated in a few collections, such as RBGE Leith and Brodick Castle.

Sorbus pseudofennica has genome composition AAB (that is two whitebeam and one rowan genomes); the other Arran endemics Sorbus arranensis and Sorbus pseudomeinichi have genomes AABB and ABBB respectively. Sorbus intermedia is a tetraploid with whitebeam, rowan and wild service tree genomes - I haven't been able to find out which has two copies.

Tim Rich's picture

the genomic combinations need

the genomic combinations need correcting - its tetraploid whilst the others are triploid see my BSBI Sorbus handbook please where it is spelt out in detail

Tim Rich

dejayM's picture

seeing and believing

Yes, Tim, I believe so. It is broad and we cannot see the underside but....
The Wiki and EOL links are very annoying for Sorbus intermedia agg.
lavateraguy's may well be a safer bet and well explained too but I live dangerously sometimes!
See mine -

Tim Rich's picture

No, intermedia agg is not a

No, intermedia agg is not a safer bet, I am sure it is intermedia sensu stricto

Tim Rich