When I got back from Europe, I was healthy (for a week) and the weather was great, so I went on a hike on Kilauea Iki Trail in Hawaii Volcanoes National Park. The trail went out toward the terrace on the right and then dropped down into the crater.

It was a neat hike because it started in a lush wet-forest with tree ferns and relatively tall trees and then dropped into nothingness. 

Ohelo (Vaccinium reticulatum)

This was one of the few plants down in the crater.  The berries are quite tasty.

This is a pretty popular trail as it only takes a couple hours for most people.  I like the size perspective the hikers offered.

'Ohi'a lehua (Metrosideros polymorpha)

The main canopy tree in the park though can take on a shrubby life-form in dry, shallow soil, such as in a crater.  One of these has been blooming outside my office window and the native birds visit it pretty regularly.  I hope to catch a photo sometime soon.