Aaron's Beard

A flower in my mum's garden... It's apparently called "Aaron's Beard" or "Rose of Sharon". The former brought the follwing to mind:

Psalm 133
A song of ascents. Of David.
1 How good and pleasant it is
when God's people live together in unity!
2 It is like precious oil poured on the head,
running down on the beard,
running down on Aaron's beard,
down on the collar of his robe.
3 It is as if the dew of Hermon
were falling on Mount Zion.
For there the Lord bestows his blessing,
even life forevermore.