Identification help please

Some 25 years ago my mother brought back some cuttings from a visit to Canada. Wherever she went she would take cuttings, from botanical gardens, nurseries, plant shows. Most of the time I had to stand guard..  
Well this is a Prunus, it flowers with plain pale pink flowers early spring, the twigs are deep burgundy red, it has very dangerous thorns, the leaves have a tinge red and this year for the first time it has plums. I always assumed it was a Cherry, does anybody know what it is.
The overall image:

IMG_3505 by Arihato, on Flickr

The new growth, with in the righthand corner the thorns/spines

IMG_3506 by Arihato, on Flickr

The fruit is about 4 cm, I have not tasted it yet as it not ripe yet, btw is it edible?

IMG_3507 by Arihato, on Flickr

I have not been able to find it on the web but I would like to know

The wild crabapples here have thorns, though not quite that wicked. I think that's what you have. It's my understanding that most of the natural crabapples have thorns, but the cultivated varieties have had the thorns bred out. As far as individual species goes, I am of no help.

You think it is a Crab, I'll have to cut the fruit to see whether it is crab or plum. The fruit has the shape of a plum.........

Prunus nigra.

Love and light

I'd say Prunus cerasifera.

AlainK wrote:I'd say Prunus cerasifera.

Had and killed one, their bark is orange and leaves green.

To be more precise, Prunus cerasifera nigra: the leaves are red in the spring, turning a dark red or dark green in summer.

It is also called Prunus pissardii nigra.

Alain that could very well be it: Prunus cerasifera 'Pissardii Nigra'.
Now all I need is to confirm that the fruit is the same. And nowhere is there a mention of the large spikes my tree has.

Maybe if you just try Prunus nigra you will get the specialized branches like the Rhus family....

but hell , please feel free to ignore me.

Love and light

Andre, I was not ignoring you   
All the searches on Prunus nigra got me Prunus cerasifera 'Nigra'. I did the search again and at the bottom there is a Wiki page on Prunus nigra aka Canada Plum or black plum.
The description looks to be right but the twig colour is not right on the pictures I find and the fruit colour differs........

So far it seems the best likeness is Prunus cerasifera 'Nigra'

Prunus cerasifera 'Pissardii Nigra' is occasionally spiky from what I read on this page from a (very good) French website:

http://nature.jardin.free.fr/arbre/ft_prunierornement.html

"Catégorie : arbre parfois épineux (...)"

I've just taken a photo of one of the very few fruit that the blackbirds haven't eaten yet:

On second thought, this might well be Prunus x cistena: it ressembles P. crasifera, but it's smaller, the leaves don't stay as red as P. cerasifera throughout the season, and the fruit are a brighter red.

These ones are cuttings from what I believe is P. x cistena:

Spring:





Summer:

arihato wrote:Andre, I was not ignoring you   


So far it seems the best likeness is Prunus cerasifera 'Nigra'

hihi O thank God  

I just found out that it was a small seedling, not a rooted cutting my mother brought back from Canada. That's probably why it took 20 years to start flowering......
Had I know that, I would not have bothered this illustrious forum for species names.
The fact that it is a seedling would make it impossible to name as a variety. I'll just put a name on it, it has the best likeness to Prunus cerasifera 'Nigra', as far as flowers, fruit and twig colour goes.

Thank you for all your suggestions.