Death Comes for the Archbishop by Willa Cather:
When he opened his eyes again, his glance immediately fell upon one juniper which differed in shape from the others. It was not a thick-growing cone, but a naked, twisted trunk, perhaps ten feet high, and at the top it parted into two lateral, flat-lying branches, with a little crest of green in the centre, just above cleavage. Living vegetation could not present more faithfully the form of the Cross.
The traveller dismounted, drew from his pocket a much worn book, and baring his head, knelt at the foot of the cruciform tree.