Platanthera dilatata var. leucostachys, the Sierra Rein Orchis, is distinguished from the other two varieties of this species by its very long spur, noticeably longer than its lip. It is much rarer in our area than var. dilatata, which has a spur equal in length to the lip and also blooms somewhat later than that species. We've found it still in bloom when var. dilatata is finished in locations where both grow. Otherwise it is indistinguishable from either of the other varieties. Plant height varies from 30 to 90 cm and the flowers are 2 cm or slightly less and very fragrant.