One afternoon last fall, the CMG team returned to the sculpture garden to add one final touch. As I reported in a Dwell.com post and slideshow, they 'inoculated' the volcanic stone walls with lichen spores to create what they call "the ultimate minimal garden." Over the next many years, the lichen will grow into patches of electric green and orange. The project architects Conger and Rayna Deniord, the project architect (shown here), conceived of the organism as a primal way of introducing nature into the otherwise spare, minimalist rooftop space.  Photo 2 of 13 in CMG Landscape Architecture