Sorbus pseudomeinichii

Taxobox
name = Catacol Whitebeam


image_width =
image_caption =
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Rosales
familia = Rosaceae
subfamilia = Maloideae
genus = "Sorbus"
species = "S. pseudomeinichii"
binomial = "Sorbus pseudomeinichii"
binomial_authority =

"Sorbus pseudomeinichii", known as Catacol Whitebeam, is a rare tree endemic to the Isle of Arran in south west Scotland. It is believed to have arisen as a hybrid of the native Rowan ("Sorbus aucuparia") and the Cut-leaved Whitebeam ("Sorbus pseudofennica") which is in turn a Rowan/Arran Whitebeam ("Sorbus arranensis") hybrid. [http://news.scotsman.com/scitech.cfm?id=936532007 Johnston, Ian (15 June 2007) "Trees on Arran 'are a whole new species'." Edinburgh. The Scotsman newspaper] Retrieved 18 June 2007.] Only two specimens of the Catacol Whitebeam are known, making it the rarest tree in Scotland and also the United Kingdom. A third was recorded as a sapling but is believed to have been destroyed by deer. A seedling has also been grown in Edinburgh.

The discovery followed work in the 1990s by Scottish Natural Heritage (SNH), Dougarie Estate and Royal Botanic Garden Edinburgh. The trees were confirmed as a distinct species by DNA testing.

Graeme Walker of SNH has said:

"These are unique trees which are native to Arran and not found anywhere else in the world, we knew about the Arran Whitebeam and the Cut-leaved Arran Whitebeam, which are also crosses between rowan and different species of whitebeam, but it has been really exciting to discover a completely new species. It is very complex picture but we think that the Arran Whitebeams are gradually evolving towards a new type of tree which will probably look very similar to a rowan." [cite web|title=New species of tree discovered on Arran|date=2007-06-14|url=http://www.snh.org.uk/press/detail.asp?id=1724|accessdate=2007-06-17]

Dr. Ashley Robertson of Bristol University, who helped discover the species, said: "It is not an evolutionary dead end. It is evolution in action".

The new species is the third endemic whitebeam found on Arran (after the Arran Whitebeam and the Cut-leaved Whitebeam) and combines the the red berries of a rowan with the oval leaves of a whitebeam. The trees are currently within a deer fence which will be extended - delivery of materials by helicopter will be necessary due to the remoteness of the location. The species is named after Glen Catacol where it was found and one of the two surviving plants is thought to be more than fifty years old. [ [http://www.redorbit.com/news/science/970324/revealed_the_new_species_of_tree_with_scottish_roots_/index.html?source=r_science Revealed, the New Species of Tree With Scottish Roots] Retrieved 18 June 2007.]

References

External links

* [http://news.bbc.co.uk/2/hi/uk_news/scotland/glasgow_and_west/6754975.stm New species of tree discovered] bbc.co.uk Thursday, 14 June 2007 (Accessed June 18th 2007)