My flower from today is nothing special (as a flower!) but the story behind that plant is pretty educational:
Brighamia insignis - endemic to the island of Kauai. Last specimen seen in the wild - 2014. There is not known pollinator but the speculations (by reason!!!) are moths of the family Sphingidae. There are two native moths of that family on Hawaii:
Manduca blackburni (extinct from Kauai sometime ago, before present on all main Hawaiian islands, now
eventually present on Maui, Kaho'olave and Big Island). And the extremely rare all time and endemic to Kauai -
Tinostoma smaragtitis - believed to be extinct also time ago.
The shade under the "flower" on my photo is not a stem - it is still the flower continuing as a narrow tube (one can find images on the Internet) and it's the reason to believe that the natural pollinators were relatively big Sphingidae). Whatever the pollinator was it's extinct and now the plants can by propagated only by the help of humans (artificial pollinating). They are not picky and are easily grown in pots - one more reason the believe the reason for the extinction was the extinct pollinator (plus some more but without a pollinator a plant that is not capable of self-pollinating has a known faith...). My photo is from small patch with these plants in the University of Hawaii Campus (3-4 all-together mixed with some other natives).
I'm sorry for the long writing but it's more important than my photo (at least for me!).