Yawning Leek Orchid - Prasophyllum hians
When I eventually discovered this orchid, the flowers were well past their prime. I was however, consoled that they were not well represented immediately to the east of Esperance, where I was investigating an area after a summer bushfire (the only time they will flower). There were only a handful of plants growing in a sandy soil around an ephemeral swamp.
Normal flowering time is from September to November.