In the forests around the Unseen Fortress, there are numerous dangerous trees. Here are a few of them...

'Wait, is that the same Damn tree we've been seeing all day?', Ured the strong demanded. 'No... Yes, yes it is.' stammered Fenstill the mage.
'Well, I'm sorry, but I'll have to kill you now...' said Ured, drawing his sword. 'I understand,' said the mage, wondering why he got into the magic business anyway...

With apologies to Monty Python...

'Yarun slipped into the pit - his curses suddenly converted into screams of mortal agony. Looking down into the pit, all we saw was a mass of writhing serpents and frothing blood....'

MUL-FS550 Fire Support Robot

Variant of Mobile U Logistic Robot

RR80 Corpsman(TM) - Battlefield Casualty Recovery Robot

What follows is an passage from the journal of the famous Beastiographer Laans Torier

'Many have said the Old Men of the mountain were mere myths, or had been wiped out by the Theosians many years ago, but I am staking my reputation on the fact that they do in fact still exist!'

While one cannot deny the beauty of the Giant Foxglove, it is tempered by the knowlage that the beauty hides its deadly nature.

From the Book, The Southern Reaches - of Savages and Silver, a travel log by Admiral (ret.) Saveth, noted Naturalist.
'One of the most interesting discoveries we made during our visit with the Hanaset was the odd looking, but very useful beast they called the Ralu. '

Kazarad the lich watched his minons strip the slain adventurers of their gear, and he being the meticulous type, the gear was sorted into piles. One of larger piles was a heap of iron spikes. 'Why do they all carry those damn things? What am _I_ supposed to with all of those? '

Then a moment of inspiration stuck him.....

Nethernimbus - Also known as Wraithstorm, Necronimbus, The Great Blackness

the Apple Tree of Selilion holds the secret of life and death

Lutazum is an immense (32' at the top of it's shell) tortoise which walks on huge 2' thick legs. It is dark green with speckles and looks about with suprising intelligance. On top of its shell are strapped leather containers of all description.

Demontrumpets, as illuded to by the name, are not normal plants, but are plants who hold their origin in the Abyss. Perhaps brought by summoned demons, perhaps created by a dark god for some purpose, perhaps simple plants mutated by an artifact of great evil.