Progress

So here's a list of flowers narrowed down further:

Aloe vera- grief, superstition

Amaryllis- pride
Balsam- impatience

Basil- hatred

Begonia- beware, fanciful nature

Calendula/Marigold- cruelty in love, despair, grief, jealousy, vulgar minded, pain

Campanula/Bellflower- disappointment, loss

Carnation(yellow)- Reject, disdain, disappointment

Cyclamen- resignation, goodbye

Cypress- death, mourning, despair, sorrow

Dahlia- instability

Hellenium- tears
Madder- calumny, slander

Mint- suspicion

Mock Orange- counterfeit
Oleander- caution, beware

Petunia- resentment, anger

Rhododendron- danger, beware, agitation

Rose(black)- death, disdain, disappointment

Thorn apple- disguise

Tiger lily/orange lily- hatred, pride

I had to google through the ENTIRE negative flowers list here one by one slowly as I had no idea what any of the flowers look like based on just their names. Though most of the flowers on the list can be found to be growing natively in European countries, there were a few that can be found locally as well. Though there was also the problem with most of them being out of season. The tiger lily and rhododendron for example, were not in season, so I definitely couldn't get ahold of those...

tiger lily

rhododendron