It's spelled 'Valaspis', after its parents RR. valentinianum and leucaspis.

"Showy, pale yellow flowers, in loose clusters of 4-5, bloom early in the season. Foliage is small and hairy with a bronze hue when immature"

--Greer's Guidebook to Available Rhododendrons

Greer also indicates it is expected to be roughly 3' tall after 10 years of growth, is hardy only to about 10 degrees F. and was introduced in 1935. Good candidate for container culture, being small-growing, small-parted and needing to be portable so it can be protected from low temperatures.

That's the one. Thanks so much, bboy.