thelypteris palustris pubescens

NOUN
31 LETTERS · STARTS WITH T

thelypteris palustris pubescens is a valid 31-letter word worth 45 points in Scrabble and 53 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1H4E1L1Y4P3T1E1R1I1S1P3A1L1U1S1T1R1I1S1P3U1B3E1S1C3E1N1S1
1 + 4 + 1 + 1 + 4 + 3 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 3 + 1 + 1 + 3 + 1 + 1 + 1 =45 PTS
DOUBLE WORD → 90TRIPLE WORD → 135
MEANING

What does thelypteris palustris pubescens mean?