This is a species that Lucinda and I described a few years ago. Seems almost certainly related to other pedunculate Costa Rica species (e.g., R. pittieri, R. stemonacanthoides), but different by its seriously lanky leaves. Currently known only from the Osa area of Costa Rica. I was delighted when Ricardo sent us a photo of this – my first viewing of it in the cellulose, for we described it based on herbarium specimens only.
Wild collected, Costa Rica, voucher unknown; Photo by Ricardo Kriebel