I've noticed a plant (shrub I think) this spring in my area. I researched it and came up with Japanese Kerria - Plentiflora. I can't seem to find any at my local nurseries. Do you have any idea who might sell them?
Kerria Japonica is a shrub with long, arching, vine-like growth. It flowers profusely in the spring and grows best in full sunshine and average soil. Niche Gardens, 1111 Dawson Rd., Chapel Hill, NC 27516 carries it. Their phone number is (919) 967-0078.