. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. EM BRYOPH YTA—PTERIDOPH YT A 313 FILICALES Leafy plants, fronds usually raised on a stipe; coming from a rootstock; leaves usually rolled up in the bud, circinate; spores all of one kind and size, produced in sporangia which occur on the back of the frond, these at maturity break open and discharge the minute spores, which develop prothalli that bear the antheridia and archegonia. The following sub-orders occur in the United States:
. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. EM BRYOPH YTA—PTERIDOPH YT A 313 FILICALES Leafy plants, fronds usually raised on a stipe; coming from a rootstock; leaves usually rolled up in the bud, circinate; spores all of one kind and size, produced in sporangia which occur on the back of the frond, these at maturity break open and discharge the minute spores, which develop prothalli that bear the antheridia and archegonia. The following sub-orders occur in the United States: the Ophioglossaceae represented by the common adder's tongnie, Ophioglossum vulgatum, found in moist meadows, the Moonwort, Botrychium Lunaria and B. Virginianum; the Osmundaceae, large ferns with straight erect rootstocks, pinnate leaves; large globose sporangia with mere traces of a ring; the Royal fern, Osmunda regalis, Clayton's fern (O. Claytonia), the most common species in damp woods, and the Cinnamon Fern (O. cinnamomeary, occurring in wet places, marshes, etc.; the Filmy ferns, Hymenophyllaceae, represented by the Bristle Fern {Trichomanes radicans) ; Cyatheaceae with such tree ferns as Dicksonia; Polypodiaceae, Common Brake, Maidenhair fern;. Fig. 117. Marsilia (.M. quadrifolia'), a young leaf. J. Fruiting body. Bischoff. Fig. 117a. Club moss (Lycopo-dium clavatum). 1. Plant with fertile shoots. 2. Scale and the sporangium. 3. Spores. After 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 Pammel, L. H. (Louis Hermann), 1862-1931. Cedar Rapids, Ia. , The Torch Press
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