I know a rose tree springing

I know a rose tree springing
Forth from an ancient root,
As men of old we singing,
From Jesse came the shoot
That bore a blossom bright
Amid the cold of winter,
When half spent was the night.

This rose-tree, blossom laden,
Whereof Isaiah spake,
Is Mary, spotless maiden
Who mothered, for our sake
The little Child, newborn,
By God's eternal counsel,
On that first Christmas morn .

O Flow'r, whose fragrance tender
With sweetness fills the air,
Dispel in glorious splendor
The darkness ev'rywhere;
True man, yet very God
From sin and death now save us
And share our ev'ry load.