Plants
Botany
Algae (126)
Not really a botanical grouping, but shrug.
Angiospermae (6278)
According to the APG II system: Angiospermae.
English: flowering plants, angiosperms.
German: Bedecktsamer.
Swedish
Bryophyta (26)
Bryophyta.
English: mosses.
German: Moose.
Finnish: Sammalet.
Swedish: moss
Eudicotyledon (22665)
English: core eudicots.
Swedish: rottrikolpater, roteudicoter.
French: noyaux des dicotylédones vraies
Dependency: Angi
Durvillaea (2)
Durvillaea Bory de Saint-Vincent.
Engl.: durvillaea
Thaleichthys (2)
Thaleichthys -.
Engl.: thaleichthys
Fungi (300)
Botanically, it's not fungi -> families, but this lumps the fungi nicely under just three hierarchy levels (family - genus - species).
Gymnospermae (890)
Gymnospermae.
English: gymnosperms.
German: Nacktsamige Pflanzen, Nacktsamer.
Finnish: paljassiemenise
Lycopodiophyta (59)
Lycopodiophyta D.H.Scott.
German: Bärlapppflanzen.
Finnish: liekomaiset.
French: lycophytes.
Pteridophyta (285)
Pteridophyta Schimp.
English: ferns.
German: Gefäßsporenpflanzen.
Finnish: sanikkaiset.