Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . latter includesthe ferns and their allies, viz.: the horsetails and club mosses. Froma botanical viewpoint, as well as for economic reasons, it is one of themost interesting groups of plants. The Pteridophytes are a very oldgroup, being first found in the Devonian and attaining their maximumdevelopment in the Carboniferous age, during which time theyformed the bulk of the vegetation comprised in the coal-meas
Scientific and applied pharmacognosy intended for the use of students in pharmacy, as a hand book for pharmacists, and as a reference book for food and drug analysts and pharmacologists . latter includesthe ferns and their allies, viz.: the horsetails and club mosses. Froma botanical viewpoint, as well as for economic reasons, it is one of themost interesting groups of plants. The Pteridophytes are a very oldgroup, being first found in the Devonian and attaining their maximumdevelopment in the Carboniferous age, during which time theyformed the bulk of the vegetation comprised in the forms existing upon the earth are still very numerous, comprisingabout 5000 distinct species. The chief interest lies in their use asornamental plants. Aspidium.—Male Fern.—The rhizome and stipes of DryopterisFilix mas and Dryopteris marginalis (Fam. Polypodiaccese), peren-nials (Fig. 11), of which Dryopteris Filix mas is more widely distrib-uted, being indigenous to Europe, Asia, North America, west of theRocky Mountains, and in the Andes of South America; while is found in the Eastern and Central United States and 30 SCIENTIFIC AND APPLIED PHARMACOGNOSY. Fig. 11.—Leaf and a portion of rhizome of Dryopteris marginalis, the upperpinnae (divisions), showing the sori near the margins^ ASPIDIUM 31 extends north to Prince Edwards Island. The rhizome is collectedin early autumn, the leaves cut off, leaving the lower portions orstipes attached to the rhizomes; the dead portions of the rhizomesand the chaff are removed. Usually the drug consists of the stipesonly, which are separated from the rhizome, the periderm beingremoved (Fig. 12). The drug is carefully dried and preserved andshould not be used after it loses its green color. Description.—Of horizontal or oblique growth, 5 to 15 cm. longand 1 to 25 cm. thick, mostly covered with nearly cylindrical slightlycurved stipe-remnants (Fig. 12), which are about 25 mm. long and
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1920
