There is some confusion regarding both of these great hoyas. I am going to explain my experience and documentation since I have grown both of these which I purchased from the David Liddle collection directly. I no longer have the Hoya Estrella Waterfall IML 1627 in my collection but still have photos to document the exact plant, here on my website.
I received both of these hoyas as cuttings in a group purchase in the spring of 2011. They both arrived in great shape and tagged with the typed, white narrow tag stapled to each cuttings, so there are no mistakes in identification. Those tags do not fade away, tear, fall off or just get lost as many of my plants still have them attached from almost 10 years ago.
The Hoya sp. Estrella Waterfall IML 1627 bloomed for me back on July 31, 2011 which was just a few months after I rooted the cutting. That is what I consider a great rooter and great grower! According to the Liddle Master List I have, ends with IML 1902, this particular cutting was obtained from Ted Green. To my knowledge, this hoya has not been published and/or renamed.
The Hoya sp. Estrella Waterfalls IML 1256 just recently bloomed for me and was so beautiful that I decided to share it on Ebay! Enjoy it!!! According to the Liddle Master List I previously referenced, David Liddle obtained this hoya from DMC, David Cummings, who also collected this in the Philippines and called it DMC 5459 along with IML 1257 & IML 1258. Not sure if this is a typo as I am reporting from the list. To the best of my knowledge, this one has been published as Hoya estrellaensis, if the IML #s are accurate. From the photos I have seen of Hoya estrellaensis, I am going to caution you to NOT update names just yet. In my opinion, the plants and blooms are not similar in any way. Since I am not yet convinced of the correct identification, I will continue to refer to this one as Hoya sp. Estrella Waterfalls IML 1256.
Welcome to the World of Hoyas!!! Naming and renaming happens as well as correctly and incorrectly identifying. I am very very diligent when it comes to making sure the tags are intact and are not fading as I believe that in my business…a hoya without a tag is one that really should not be traded, much less sold. Even if what is written on the tag is incorrect or named for ‘fun’, at least it has a trail of IDs that can be compared with the tags in your collection. Purchasing duplicate hoyas is not pleasant and turn this hobby into a frustrating and very expensive one.