Multilayer interference iridescence or shiny!

Wow!  Those are some shiny fruits!  Quite a few shiny, colorful things actually lack pigments and their apparent color is due to iridescence, the way then bend and reflect light.  Supposedly these fruits (Pollia condenstata) are the shiniest of all such biological materials.  Now of course plants make attractive fruits to lure seed dispersers, in this case most likely birds, and the birds seek such displays to get a nutritive reward and everyone goes away happy.  However these really, really attractive fruits are deceptive providing no reward at all, so any bird that eats these fruits disperses the seeds and considering some effort was involved bascially gets cheated.  This works because such fruits mimic a similar rewarding plant, in this case possibly a species of Psychotria (right) that has bright blue rewarding fruits.  You don't get fruits colored like this in the temperate zone.

Friday Fabulous Flower - Begonia

Well, a Begonia isn't very exotic, so it always comes as a surprise that so many people don't notice what they are looking at.  Yes, flowers.  But Begonia is a monoecious plant.  Mono = one, ecious = house, so this means the plants usually, but not always, have both male and female (and yes, this is technically wrong) on the same plant (one house).  What tricks people is what tricks pollinators too.  The only obvious reward is pollen, and male flowers (center) have a cluster of yellow stamens that are pretty obvious against the light background of the perianth.  But only one of these flowers has stamens.  The others have a conspicuous yellow stigma presenting a very similar image.  If pollen is the only reward, then the non-rewarding female flowers cruelly deceive the pollinators by mimicking the rewarding male flowers.  This is called food-deception automimicry.  The flowers are different in another very obvious way that many people also fail to notice; the females flowers have a prominent winged ovary below the perianth, and a similar structure is completely lacking on the male flowers.  The ovary is sort of petalloid, and that may be the reason people don't notice.  Since the summer is here, apply this lesson to your cucumbers and squashes.