Pulp and paper magazine of Canada . efiree in tiie split bamboo fisliin;; rod. Kvenordinary .straw of common grains shows these (pialitiesin a remarkable degree, relatively to the amount ofmaterial in it. One needs but to reeall the lightnessand stiffness of a lemoiuide st:aw—now largely sup-I)laiite(! by imitation straws made of pa])er and paraf-fine—to realize this. The Structure of Straw in General; Gross ExternalStructure. As has been indicated, .straw consists of two ])arts,the stem and the attached leaves. The stem is composedof straight stretches of approximately cylindrical shapeand va
Pulp and paper magazine of Canada . efiree in tiie split bamboo fisliin;; rod. Kvenordinary .straw of common grains shows these (pialitiesin a remarkable degree, relatively to the amount ofmaterial in it. One needs but to reeall the lightnessand stiffness of a lemoiuide st:aw—now largely sup-I)laiite(! by imitation straws made of pa])er and paraf-fine—to realize this. The Structure of Straw in General; Gross ExternalStructure. As has been indicated, .straw consists of two ])arts,the stem and the attached leaves. The stem is composedof straight stretches of approximately cylindrical shapeand vat ions lengths, the intrrnodes, articulated at thenodes. Properly s))eaking tlie node is merely the trans-verse region of the stem from which arises a leaf. Intlie grasses however, the base of the leaf is usuallyswollen, forTning a prominent band (motile organ) aboutthe base of the succeeding internode (figure 1.). In thedried straw this swollen collar is shrunken, and ])re-sents characters whicli enables one to distinguish be-. Leaj^ l/ai/e Uoule Cla a/ Leaf-s/ieal/i/nter/7oc/e -Mot/le organ /Voc/e ---/nternoc^e twccn the kinds of straw here under consideration insome degres. The leaf is composed of two parts, the leaf-sheathand the hUidr. The leaf-sheath is the lower portion whichspiings from the node and folds about the internodeabove. At the top of the sheath the blade springs awayfrom the .stem, and at this point is found a membranousprojection which clasps the stem apparently as a con-tinuation of the sheath, known as the ligule (figure 1,2!)). The edges of the blade sometijues project, clasp-ing the stem (figure Id). The projections are calledauricles or, more simply, elates. The size, shape andother features of this (;rgau serve as distinguishing marksfor identification, which, in the absence of the grainand its accompanying parts, are relatively of great usein the recognition of the kind of straw (Carrier, 1917). At the base of the blade there is always a more or l
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Keywords: ., bookcentury1900, bookdecade1900, bookidp2pulppaperm, bookyear1903
