Nice input and very detailed description. Well-done!

Can you explain further about how 'the yellow color on the apex of the staminodes helps direct the pollinators to the sterile pollen'?

Thank you for your comment! The reason why the yellow color on the apex of the staminodes helps direct the pollinators to the sterile pollen can be explained by the color perception in bees! Although in humans' eyes, the red colored petals are far more attractive than the tiny bit of yellow on the staminodes. In bees' eyes, that's a different story! Although both bees and humans are trichromats (three types of color-sensitive cell on the retina), bees do not have red cone cells like human. Bees cannot see the red color on the petals, because they don't have the cone cell for it! However, some reddish wavelength, such as yellow, can be seen. Therefore, the yellow color on the apex on the staminodes are more attractive than the other parts of the flower, which help directing bees to that location.
Ref: https://www.beeculture.com/bees-see-matters/