...I've often wondered about this and, well "duh", why not actually ask it.
The reason that I ask is because those fruits that are available as scions can vary considerably from year-to-year and I never quite know what to expect. Obviously I expect diversity, and we sure do get that. I just find the changes rather interesting. About, perhaps, 5 or 6 years ago I remember seeing several different varieties of Limbertwig cultivars available,... but not since. Likewise, at the Fair in 2016, there was a surprising assortment of hard cider cultivars available, but not necessarily since. Checking some of my cursory notes for apples, there were: Amere de Berthecourt, Bulmer Norman, Cap of Liberty, Dabinett, Dymock Red, Frequin Rouge, Harrison, Muscadet de Dieppe, Somerset Redstreak, Sweet Alford, Vilberie, and I know there were various others.
...Did these scions all come from one person, or one orchard? Was there a decision made by someone to have numerous cider varieties available that year? Clearly, with such a vast number of cultivars which could be offered in a given year, is there some kind of planned co-ordination going on somewhere?
The cat is curious. Very curious. Apparently it awaits death. 
Tim
We are the solution and we are the problem.
From the beginning, the idea of the Home Orchard Society scion exchange is that ordinary members prune extra scion wood in the winter when dormant. Then we bring it to the scion exchange in the morning. We can greatly expand our variety of fruits grown that way. Most of the scions are just gathered and collected that way.
However, there are some institutions that allow HOS members to collect scion for distribution. Joanie Cooper usually coordinates this process and she is usually looking for people to help. If you are interested, please email Joanie.
I gather scion each year to bring in, and I graft each year too. My plan is that when I retire, I will be able to help on such outings. I haven't retired yet. Still a few years away.
John S
PDX OR
Thanks for your commitment and I know you will look always into exploring new avenues!!
I am already a retiree. At this time I have explored avenues and here just a brief summary about health in cherry orchards per at least since 1940, and thus in 1944 the implementing of a new sanitation program had begun.
So google for this powerpoint presentation file,
Cherry-leaf-roll-identification-1
I have several of these informationals and should you or any of these other great people wish to meet with us and Joanie-offline for early March at the restoration of Botners apple program I will be sure to bring these with me. As I they probably need to be summarized with references and then converted to PDF and made available through John's help desk at scion events or planned meets.
Prevention (see above link) is the key but the good news is there is alot we can do about it!! As one grafter the more I take stone fruit scions graft tasks from other volunteers the less necessity to bleach/rust away those intricate devices. It is much more effective rotating brand new window scraping blades for sanitation if your hands skin is well callused thick and aged and can hold them safely bare-handed.
Newbies beware: Viruses brought in for the grafting of cherry is not really advised unless brought directly from a nursery. All trees are capable of virus and never can be cured. Stone fruit kinds of viruses are transmisable to other stone fruits via knives. Apple, pears types viruses are not so effected and important to monitor.
John: or others: See you at the exchange if not earlier. (hint: contact Joanie and meet me priorly at Clackamas save the trees)
Idyllwild
jafar
Marsha H
Viron
John S
1 Guest(s)