dryopteris thelypteris pubescens

NOUN
32 LETTERS · STARTS WITH D

dryopteris thelypteris pubescens is a valid 32-letter word worth 50 points in Scrabble and 55 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2R1Y4O1P3T1E1R1I1S1T1H4E1L1Y4P3T1E1R1I1S1P3U1B3E1S1C3E1N1S1
2 + 1 + 4 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 4 + 1 + 1 + 4 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 3 + 1 + 1 + 3 + 1 + 1 + 1 =50 PTS
DOUBLE WORD → 100TRIPLE WORD → 150
MEANING

What does dryopteris thelypteris pubescens mean?