If I insert both 'dry' and 'dryish' values for the terrain tag, the flora stops working. If I put just 'dry', I can find it in heathland. If I put 'dryish', I can find them on hills. But should I put both, I can't find them at all.
.Large spruce. (1) [grass]
[TILEGFX:bc-spruce]
[SIZE:L]
[SPROUT:1]
[MATURE:1]
[WITHER:12]
[REGION:eastern western southern]
[TERRAIN:dry dryish]
[POPULATION:1]
[FREQUENCY:50]
[COMMONNESS:50]
[LEAF_VOLUME: bunch]
[LEAF_SIZE: L]
[LEAF_QUANTITY: 1]
[CARB:0]
[FAT:0]
[PROTEIN:0]
[WATER:0]
[HERB_KNOWN:all]
Not really urgent now that I know it. Just announcing it so that people don't have to waste as much time looking for the reason their flora isn't working.