Fri April 27, 2012
Wildflowers, the Indicator Species
Lovely woodland wildflowers are reliable “indicators” of soil moisture, fertility and light conditions. Wildflowers on the forest floor repeat patterns seen elsewhere each spring. The flowers speak to the patterns of why plants and trees grow where they do in our forests.
"Red Trillium" and the small delicate pink and white candy-striped "Spring Beauty" bloom in enriched soil sites. Here leaves collect against stonewalls beneath sugar maples, white ash and basswood which also indicate fertile loam soils. On the opposite end of the soil spectrum, bright yellow "Coltsfoot" looks like a coarse, stubby Dandelion. It grows from nutrient-poor sand and silt found in roadside ditches. Its name derives from the notched shape of its leaves.
"Pink Ladyslipper" and the vast carpet of "Canada Mayflower" are able to grow in low pH, acidic soils beneath oaks, pines or spruce. Ladyslippers prefer partial sunlight whereas Mayflowers tolerate deep shade beneath the closed canopy of pine or spruce. Five-pointed "Starflower" also grows in acidic conifer needles in shade. Lemon-yellow flowers of "Bellwort" also known as "Wild Oats" utilize temporary sunlight reaching the forest floor beneath hardwoods which have yet to leaf-out.
To learn the spring wildflowers is to also learn what they say about their soil and forest habitat preferences. My advice: take a springtime walk in the woods. Flop down in dry leaves or needles and admire the fleeting beauty from the perspective of a tiny wild bumble bee on a warm, sunny spring morning!