lobelia
its a yellow flower. plant
Yellow
a yellow magic bean is a flower you plant!
Since most pollen is yellow any plant with a red flower would fit the description
marigold
jamanthi plant seen in kerala having yellow and white color flower ...
It could be a tansy, I don't know.
Herb Paris
A Yellow flower is seedless, But have little pods which aren't considered as seeds.
I was recently on Kona and my friend had a "How" plant (sp?). During the day the flower was yellow, then in the evening it turned red, then fell off the plant. This may be what you're referring too.
Herb Paris
Unlikely. Any flower will be seedless until it is pollinated then the reproduction cycle starts ending in seed production.