Michael Compagno snapped the images above in Alaska of Dryas octopetala, which is commonly known as white mountain avens. A member of the rose family, it is a plant of cold boreal and arctic regions and it extends south from Alaska through Canada and into the United States by growing down the chain of western mountains. Each tiny, seedlike fruit, technically referred to as an achene, is equipped with a long feathery tail that aids in catching the wind and helps to disperse the seeds to new locations. These images were captured in August and it was the middle of autumn in Alaska. Thus, very few plants were in flower but many were in fruit. If Michael had visited earlier, he would have been greeted by many dozens of pure white flowers, held a few inches off the ground, and resulting in a spectacular display. The flowers face the sun and the petals form a little bowl that concentrates the sun's rays and raises the temperature of the central part of the flower several degrees above the ambient temperature. Thus, keeping its pollinating insects cozy and warm.
© 2011 Michael Compagno (images) and Rufino Osorio (text) (exclusive of the USDA map).
Michael Compagno, an attorney at the South Florida Water Management District, took this striking photograph of the pink lady's slipper in June of this year while hiking a trail in Isle Royale National Park in Michigan. The plant grows in a wide variety of conditions, from lightly shaded to full sun and from wet to dry. However, it has three absolute requirements: highly acidic soil, freedom from the competition of taller plants, and rather cool summer temperatures. Here it is growing with a rich assemblage of plants that includes Clintonia borealis, Cornus canadensis, Coptis trifolia, and Trientalis borealis.
