Spiderwood comes mainly from China and or its surrounding countries, its Azalea (Rhododendron) in this region of the world this plant is already cultivated for ages by budhist monks. For it's medicinal propperty and the flowers symbolism as a gift. I believe the Chinese common name for this plant is "Think about home plant". I have to guess now, but because a shrub can gat rather big and old, nurseries cultivating it likely use the plant only till it reaches a certain age than cut it, dig it out and replant young ones again.
The roots go as a by product to the pet industry.
Wood under the name Savanna wood comes from Africa.. Mopina and Opuwa are a few i know of come under this name but there likely is more.
Probaly dug up from farming and mining fields etc. Instead of burning it, it goes around the wolrd for the pet industry again.
Yati Wood is Teak.. I guess it doesn't need explaination if you sit at or on teak furniture.
Cholla wood, is from the Cholla cactus, the flowers are edible and also have medicinal propperties. Cultivated and farmed in and arround Mexico.
Bog wood comes from the Peat mining sites wherever it is dug up.
Mangrove, grows all over the wolrd Africa has the most of it... And for example Brazil has a huge Urban mangrove site, a Manguetown build smack in the middle of a Mangrove swamp. Guess what..
There likely is much and much more, as a by product from a variety of undustrial sites. If we weren't there to buy it they would still dig it out and burn it
As Tim wold say, in it for a fast buck.