Key to Trees of Logan Canyon

Option 1
Are the leaves not toothed, leathery, and most are persistent through the winter? It is a curlleaf mountain-mahogany (Cercocarpus ledifolius).

Curlleaf Mountain Mahogany sketch

Curlleaf Mountain Mahogany leaves

Curlleaf Mountain Mahogany tail

Option 2
Are the leaves toothed, not leathery, and not persistent through the winter? It is a true mountain-mahogany (Cercocarpus montanus).

True Mountain Mahogany sketch