Plant-life, with 74 full-page illus., 24 being from photos, by the author and 50 in colour from drawings . )is the most impressive; its vegetative shoots rise to aheight of over 6 feet, and their graceful branchings anddelicate colouring render them very attractive. Thespore-bearing shoots appear solitary in the spring; theyare not more than 10 inches high, and by the time thevegetative shoots appear they have done their duty andwithered away. This species occurs in marshy, wet,and shady places in temperate Europe, in Russian Asia,and North America. All the species display a family likeness. T
Plant-life, with 74 full-page illus., 24 being from photos, by the author and 50 in colour from drawings . )is the most impressive; its vegetative shoots rise to aheight of over 6 feet, and their graceful branchings anddelicate colouring render them very attractive. Thespore-bearing shoots appear solitary in the spring; theyare not more than 10 inches high, and by the time thevegetative shoots appear they have done their duty andwithered away. This species occurs in marshy, wet,and shady places in temperate Europe, in Russian Asia,and North America. All the species display a family likeness. The stemsare hollow, jointed, furrowed, and erect; the leaves aremuch reduced; they form sheaths at the joints of thestems; branches, when present, occur in whorls at theleaf-sheaths. E. arvense, the Common or Field Horse-tail (Plate VIL), an almost cosmopolitan species, maybetaken as a type. The rhizome (Fig. 1, m) penetrates2 or 3 feet beneath the surface of the soil; it possessesleaf-sheaths, and sends out adventitious roots from itsnodes; it also produces tubers from which new plants are Plate CORN-HORSETAIL {Equisetum ar-ueme). 1, Fertile Shoots a. Spike bearing sporophylls b. Younger spike, enlarged c. Cross-section through spike d. Sporophylls f. Sporangia (closed) f. Sporangia (open) 2. Vegetative Shoot g. Spores h. Spores, enlarged, with four elaters, opea and closed/, Leaf-sheathk. Ringm. Horizontal rhizome HOESETAILS 159 vegetatively developed. Two kinds of aerial shootsrise from the rhizome, the one kind being fertile and theother vegetative. The fertile shoots appear early inspring; they are almost colourless, each one is sur-mounted by a spore-bearing cone, and when the sporesare shed it dies down. It is a part of the economy ofthe plant to waste no energy on shoots that have servedtheir purpose. The vegetative shoots appear after thefertile ones have withered, and, unlike the latter, theyare branched, and the branches are of a deep greencolour. The fertile s
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1915
