Abstract

Photographic resource materials to assist in identification of seeds and seedlings of grasses and forbs native to Minnesota prairies are being developed as part of a grant from the Legislative Commission on Minnesota Resources. Native plant materials are being used for habitat improvement, roadside vegetation, and landscape plantings throughout Minnesota. Seeds were obtained from producers or collected from prairie remnants. Seed photographs were taken with a Wild Leitz stereomicroscope and camera unit using Kodak EPY 64T film. Magnification was 6.5X, 10X, or 16X based upon seed size. Seedlings were photographed with one or two true leaves using Kodak EPY 64T film with a Nikon FM2 camera with a 55 mm micro Nikkor macro lens and an extension tube when necessary. Nondestructive sampling using photographic techniques provides a relatively quick and inexpensive means of recording information on potentially rare species. The color pictures and slides developed in this project provide an effective tool for educators, producers and land managers to easily distinguish between seeds and seedlings of valuable native plants and those of weedy species undesirable in restoration projects or cropping systems.

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