Acmispon glaber

I’ve been looking at a lot of deerweed flowers, and I’m not convinced by the prevailing wisdom about their varying colours. If an individual flower turns orange after pollination, as I’ve often heard, then I would expect to see a more random distribution of orange flowers. But it’s very consistent — the further down the stem, the darker (and more shrivelled) the flower. There are no yellow flowers down low — am I to assume that every single blossom was pollinated? And there are no orange flowers up high — why not? I see bees up high.

It really seems to me that every flower gets darker as it gets older; that it’s age, not pollination, that makes the colour change.

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