gymnosperm genus

NOUN
16 LETTERS · STARTS WITH G

gymnosperm genus is a valid 16-letter word worth 26 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
G2Y4M3N1O1S1P3E1R1M3G2E1N1U1S1
2 + 4 + 3 + 1 + 1 + 1 + 3 + 1 + 1 + 3 + 0 + 2 + 1 + 1 + 1 + 1 =26 PTS
DOUBLE WORD → 52TRIPLE WORD → 78
MEANING

What does gymnosperm genus mean?