Five Minutes to Moonflower (Published 2015)

Put another way, who stands outside for hours, gazing at a starflower instead of a Samsung Galaxy? When you’re stalking a hawkweed at daybreak, time is an afterthought.

Like so many botanical concepts, the flower clock originated with the Swedish ur-taxonomist Carl Linnaeus, in his 1751 treatise “Philosophia Botanica.” Based on field observations, he divided flowers into three categories. The meteorici open and close with the weather. The tropici follow the changing hours of daylight. And the aequinoctales, Linnae