常绿无刺 (Evergreen Thornless) 黑莓品种

Rubus fruticosus 'Thornless Evergreen' (Braam 'Thornless Evergreen', Doornloze Braam)
Thornless Evergreen. Doornloze Braam met diep ingesneden blad en purperrode twijgen, Hoogte: 200 cm., Standplaats: zon, Plantafstand min. 1.25 cm., Rijptijd: half augustus - half september. Bijzonder: groenblijvend en lage soort. Moet goed rijp geplukt worden anders valt de smaak tegen.   

Oregon Thornless or Thornless Evergreen gives big crops each year of medium sized firm fruits from mid Aug until Oct. Being a natural occurring form of the invasive cut leaf evergreen blackberry or Rubus laciniatus, it retains its thornlessness in the outer layer only, so take care not to damage its roots and remove any thorny suckers you see. There seems to be widespread variability in sold forms of Thornless Evergreen regarding fruit size, flower colour etc.

The Everthornless clone of it (retains thornlessness from its roots) has never gained wide popularity outside of commercial plantings other than Oregon U.S as it is prone to rust and is rarely offered publicly; plus it retains thorns on the bottom two feet of the plant! Some Thornless Evergreen variations sold could be this Everthornless type crept into the mix by mistake. But to most the Thornless Evergreen is still superior for the amateur fruit grower.

Highly recommended for its attractive appearance. Great for growing in a big container and very hardy. Relatively cheap and easy to find too in most garden centres.

I've come to the conclusion that Oregon Thornless and Thornless Evergreen blackberry plants are not the same cultivar after growing both. The Oregon has small fruits and ripens end of Aug onwards, whilst the Thornless Evergreen is mid Aug onwards or even sooner with much larger fruits and more attractive pinkish flowers.
I have never seen thorny suckers from the Thornless Evergreen in 10 years of growing it, but the Oregon became a thorny mess after just a few years from planting, so I had it removed. I don't know why these are referred to as the same plant? So confusing!