Lockii

Hoya lockii is named after the Vietnamese botanist - Professor Phan Ke Loc.

Leaf plate is leathery, oval or narrowly obovate, dark green on top, light green on bottom, old leaves sometimes with dirty purple marks, 7.5 - 13.5 cm long, 2.5 - 5 cm wide, wedge-shaped at the base, with a main vein, better visible on the bottom surface, with 6 - 9 pairs of lateral veins. The tip of the leaf is a pointed, slightly wavy edge.

In a flower umbrella, 8 to 25 individual flowers usually open. The corolla lobes are fleshy, white, pearl-iridescent, with rare pink markings on the outside, about 2 cm in diameter. Crown 5 - 7 mm high, 9 - 11 mm in diameter, glossy white. Hoya lockii flowers are almost odorless during daytime hours and very fragrant in the evening. They emit a strong chocolate flavor at night.

It is most likely that Hoya lockii is an endemic of Vietnam. The only place known today as its natural habitat is deteriorating due to deforestation, road construction, and other human activities. The variety is obviously very rare and is known only as a single colony from less than 50 mature specimens. Therefore, there is a suggestion that Hoya lockii should be considered as a critically endangered species (CR) according to the IUCN Red List Categories and Criteria (IUCN, 2010, version 8.1).