. An introduction to the study of lichens. With a supplement and ten plates. Lichens. 60 Plate i. 1. ROCELLA. 5. Efhebe. 6, 2. USNEA. CcENOGONIUM. 3. Theloschistes. 4. Collema. A. Cortical layer. B. Gonidial do. C. Medullary do. Plate 2. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Willey, Henry, 1824-1907. New Bedford [Mass. ] Printed for the Author by E. Anthony

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectlichens, bookyear1887