Walking along Shady Hollow Trail at Comlara Park, Sherrie Snyder spots a small flowering plant in the underbrush that contains a series of delicate deep purple blossoms. She stoops to snap a photograph of it on her cell phone.
"I'm going take a picture of this little guy, the dwarf larkspur," she says.
It's all part of a citizen-science project called Flora of Comlara Park. She and other volunteers—you might call them plant Sherlocks—observe and photograph the current plant life so that botanists can compare the plants growing today with those that grew a hundred years ago in central Illinois.