The leaves of Zantedeschia 'Flame" are as good as the flower.
Ensete ventricosum 'Maurelii': these dark red leaves make it worth pulling the plant in fall and replanting in spring.
I showed the flower of this NOID Canna yesterday. Here's the leaf that gains it admission to the garden. (Update: this is Canna 'Pretoria'.)
Now a couple of other foliage plants I'm enjoying this month:
Meliathus major 'Purple Haze'. When you touch or move the leaves, it's clear why its common name is Honey Bush.
Tetrapanax paperifera 'Steroidal Giant'. The mild winter let this plant get an early start, and it's about eight feet tall now. Can you see a little black dot near the center part of the edge of the lowest leaf?
There he is, just waking up this morning. What a great place to camp out on a warm summer night!
For more foliage fun, visit Pam, the host of Foliage Follow-Up at Digging.