Dendrochilum magnum var. album. This is a pretty hefty orchid at over 2 ft. tall, earning its name, the "Large Dendrochilum". Big for my tiny greenhouse anyhow. It's an albanistic variety, the normal type having orangish petals. This particular species of Dendrochilum originates from the Philippines where it grows in mossy alpine forests at around five to six thousand feet elevation. It's quite different from your typical grocery store Moth Orchid, isn't it? The long chains of flowers can be quite spectacular on a large plant, often creating a display of thousands of flowers. This one reminds me of Hawaiian flower leis. It takes up quite a bit of bench space in my greenhouse but its worth it.