Hoya carmelae was discovered by Ulysses Ferreras in Luzon, Province of Isabela, Municipality of Maconacon, Brgy. Reina Mercedes, Mt. Pinalinaw, 1100 m. I can find little else on this Hoya other than Dale Kloppenburg helped publish the paper. If it was true that the plant was found at 1100 meters, this Hoya must be a relatively cool grower as temperatures at that elevation are much cooler than at sea level.