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P. Dryopteris. Aspidium marginale. A. spinulosum, variety undetermined. A. spinulosum, var. dilatatum. A. Goldianum. A. acrostichoides. A. aculeatum, var. Braunii. Cystopteris bulbifera. C. fragilis. Onoclea struthiopteris. O. sensibilis. Woodsia Ilvensis. Dicksonia punctilobula. Osmunda regalis. O. Claytoniana. O. cinnamomea. Botrychium lanceolatum. B. matricariæfolium. B. ternatum.
Thus, Arethusa, Cypripedium, Pogonia, Calopogon, Spiranthes, Festuca, Osmunda, Onoclea, Lycopodium, Polytrichum, Bryum, Marchantia, Usnea, Parmelia, Cladonia, Agaricus, Chondrus, and perhaps a few other genera, furnish plants so familiar and so striking that a child will be sure to inquire concerning them, and a general description could easily be framed in a few words which could not mislead him concerning them.
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