The lilac is an ancient shrub

The Lilac is an ancient Shrub
But ancienter than that
The Firmamental Lilac
Opon the Hill Tonight -
The Sun subsiding on his Course
Bequeathes this final plant
To Contemplation - not to Touch -
The Flower of Occident.

Of one Corolla is the West -
The Calyx is the Earth -
The Capsules[^a1] burnished Seeds the Stars -
The Scientist of Faith
His research has but just begun -
Above his Synthesis
The Flora unim - peachable[^a2]
To Time's Analysis -
"Eye hath not seen" may possibly
Be current with the Blind
But let not Revelation
By Theses be profaned - detained -

[^a1: Capsules | Capsule's]

[^a2: unim - peachable | unimpeachable]