From left to right:
Amoeba Dan, Amoeba Tolz, Amoeba Shon.

The Amoeba is a Prime Roots Flora. Though technically it's not a plant but a plazmoid.

It's scientific name is Dziku. It appears in 3 variants, seen on the right.

In most of the Prime Roots, the Dziku you'll encounter will be nothing but scenery. But in the Kitins' Lair some of them can be targeted and killed. Killing these is part of the Medic and Scrollmaker occupations.

• Amoeba Dan appear in the entry room and the west side of the Cattle Room. They are needed at grade 1, grade 2 and grade 6.
• Amoeba Tolz appear in the east side of the Cattle Room and in the Old Mines. They are needed at grade 3.
• Amoeba Shon appear in the Prime Eggs Room. They are needed at grade 4 and grade 5.

The 3 variants can be seen from left to right in the image on the right.