Are Allamanda and yellow mandevilla the same thing?

Are Allamanda and yellow mandevilla they same thing? I'm looking for something yellow, any ideas?

I think allamanda and mandevilla are the same. You can find them in yellow, pink, lavender, that I know of. Check the Plant Files.

The yellow mandevilla is completely different from the yellow allamanda.
yellow mandevilla splendens is a twining vine, shiny green leaves, medium sized yellow trumpet flowers in a nice lemony yellow. http://mgonline.com/mandevillayellow01.jpg
yellow allamanda cathartica is a vining shrub(sometimes called "brown bud allamanda"), does not twine usually(mine never have), has golden yellow large trumpet flowers. The stems are "stiffer" than the mandevilla. http://komaluyo.com/images/yellow12.jpg
sometimes the two names are interchanged and this causes confusion.

I have a mandevilla vine, yellow blossoms. Thought allamanda was a flowering bush.

Allamanda Cathartica is mostly a woody upright plant,likes wet areas..good in zone 9-11,If kept well can produce large yellow flowers most ot the season....Mandevilla tender woody vine pretty yellow blooms good climber. both good for florida

Thank you all for the info. I will be searching for the yellow mandevilla since I wanted something to cover a lattice.

sorry bassetts, did not mean to confuse you. but I got curious myself and went to plant files. When I did a search on mandevilla, the 4th entry said: yellow mandevilla, wild allamanda. In any case, this is not a plant I know first hand but when I've seen it at the store, I've seen both names for the same plant.

I tried growing Alice Dupont (pink) mandeville a few years back and I couldn't keep it alive but it seems everybody else does wonderfully with it. Go figure.