One node rooted cutting.

More information about this Hoya 

Hoya platycaulis is a native of the Philippines and was published by Simonsson & Rhodda in 2005. The plant got its name from Latin platys and caulis for “flat” and “stem,” respectively. The trait that all new stem growth is flat seems to be unique to this Hoya.  As the growth matures the flat stems will become rounder in time.

(Source: Vermont Hoyas)