It's been a while since I have posted here, but I had a bit of time to take photos of my Polystachya longiscapa . I purchased this plant from Afri Orchids in Summer 2019, and this is the second bloom under my care. The type specimen was collected from the slopes of Lupanga Peak (Lukwangule Platerau), the southern part of the Uluguru Mountains , in Tanzania. The species are found in both northern and western slopes of the Uluguru Mountains at altitude 700-1680m as a lithophyte (Mytnik-Eismont et al. 2011). In nature, this species is found in only this area, so it is a narrow endemic species. Interesting, the Uluguru mountains appear to contain many plant species endemic to the area (Temu et al. 2008). When I saw the flowers, I thought they look quite different from the typical flowers of Polystachya . Indeed, the placement of this rather taxonomically unique species has been difficult. Some authors separated the early branching Polystachya species into several genera; D
Angraecum viguieri is native to northern and central Madagascar (Province of Antsiranana and Toamasina , Cribb & Hermans 2009). Thy occur in Humid, evergreen forest on plateau and mossy ridge-top forest from the elevations of 900-1100m. Based on the elevation range, I was growing it at a warm end of intermediate temperature for 7 years; the max/min daily temperature is 29-27/21-24C (80-85/70-75F) in the summer and 18-21/16-18C (65-70/60-65F) in the winter. It kept growing, but I didn't get any flowers. In September 2021, I removed it from the mount and potted it. That's why the stem has the bonsai-like bent. I also moved it to a cooler area; the max/min daily temperature is 29/18C (84/65F) in the summer and 21/13C (70/55F) in the winter. And I finally got rewarded with the fragrant flower this year. The cooler area also gives more seasonal variation in the temperature, compared to the relatively constant temperature of the basement. So I'm not sure if it lik