I guess this lipstick plant was sold firstly to commercial flower market in Thailand under the variety name "Thai Pink" only. But Thailand is not the origin habitat of this pink Aeschynanthus. I ever saw a similar pink lipstick plant was found in Luzon, Philippines from a research ... so the known habitat of this lipstick plant may be Philippines so far. Anyway, Aeschynanthus chinanthus stands out with its pink color from the family of red. Aeschynanthus in Asia shares the similar ecological role as the Columnea in America, I believe there are many unknown species waiting for exploration.