Curiousity on harvestable material.

So I have looked into the video's and whatever the internet can assemble but I have a few questions, maybe somebody else knows a bit more on the topic.

All through the ES series the map is littered with plants you can harvest, In other MMO's there is a very limited amount of plants.
My question is, how many of the familiar and new plants will be available?
Can I get my Bunglar's Bane and mix it up with my snowberries?

Second question is:
again in the TES series there are items you can find on corpses or lying around that are probably considered junk.
Will there be perhaps less obvious, even hidden uses for things like bones?(perhaps turn into bonemeal).

And my last question is:
If I cannot adventure through enemy lands how will I obtain materials local only to their lands?
Id prefer to not have to scavenge through city crates to find them.

I'm fairly sure that all climate-matching plants will be available in an area. That's just me taking a random stab, but based on the general feel I get from the team they want it to be extremely nostalgic and immersive for areas already covered, and so at least having every previous plant available (at least in that area) seems like a decision they would have.

I think many junk items will just be "sell this random useless loot for a few more coins". I would love to see a few previous junk items become useful in some way though.

To gain materials from other lands, I assume we'll have to pay for them in some centralized world market accessible from various main cities. Items from other lands will be marked up because of some kind of importation tax. This would provide an extremely interesting world market that some people could exploit to make large sums of gold. Either that, or maybe brave Cyrodiil and get close to other faction locations. This seems extremely risky though, and so I'm thinking there will be some other alternative than just that.

Good Response :)

I'm thinking one way of obtaining materials from unreachable locations would be traveling traders.
Or potentially a way of 'extracting' them from enemy players :p

a game without harvestable plants is simply a game not worth playing

As long as there will be crafting and alchemy in game there will also be plants that you can gather harvesting them. I believe there are going to be all the other materials we have seen and some more which will be new.
About the question of how we will be able to get materials and plants which do not exist in our faction is a question that I also have, but I believe the best answer for this could be what Avidus said about traveling merchants that will sell items from all the factions.

I would imagine that if the two plants shared the same properties you'd be able to mix them to create a potion.

For example you could mix Butterfly Wings with Marshmerrow to get a healing potion.