He lists a Hoya angustifolia.
Fact: What he sells in not that species. Hoya angustifolia Traill was published in 1827. It turned out that it was a narrow leafed clone of Hoya pottsii Traill, native to the Asian mainland. Once used at the rank of species, even though vacated, the code does not allow the name to be used again by a different species. A. D. E. Elmer gave a Philippine species the name of Hoya angustifolia, which is what I believe Mr. Smoley has. Elmer’s use of that name wasn’t tenable due to the previous publication and to the fact that he published in English and the Code mandates that it be in Latin. I do not know what this species is but I believe his source was Ted Green or someone who got it from Ted Green. If I am correct, it could be one of at least 4 different species (one of them a dischidia) that Ted Green has, at one time or another, sold mislabeled Hoya angustifolia. The man is bound and determined to sell a plant with that name. When one of his offerings is proved wrong, next year his catalog will still listed the name but the buyer got a different species. I know. I have copies of his catalogs dating from 1977. I bought his “Hoya angustifolia” 4 years in a row and got 4 different species. I’d been warned that I would but “I’m from Missouri!” I have to see proof with my own eyes! The last one I bought as that species turned out to be Hoya kentiana.
So, if you get a hoya with the label of Hoya angustifolia, you can be 100% certain that the hoya is mislabeled.