I sowed wild flower seeds on the hillside which is very close to my flower garden bed. The wild flower seed mixture contains plain coreopsis (yellow outer petals, dark red inner petals, dark red center with a little of yellow parts; needle like leaves) and lance leaf coreopsis (yellow flower entirely; lance leaf). They are flowering now.

I also planted coreopsis basilis sunshine (needle like leaf) in my flower bed. My question is what

of coreopsis is this one in the picture?

I love this plant in the picture, I would like to plant more of it. However, I am not sure if it is just growing from another wild flower seed I sowed on the hill and washed down to my flower bed, or is it something I planted without realizing it. This entire plant is much more compact and shorter than either plains coreopsis or lance leaf coreopsis, which is leggier. This plant is also like the combination of lance leaf coreopsis and plains coreopsis; it has sort of the same flower as that of plains C while having lance leaves.

Please help! thanks