Plants and their ways in South Africa . rd used meaning leaf is sometimes difficult to make out on branches placed hori-zontally, as the leaves borne on the lower side turn so as toface the light. Compare them with upright branches. Instead of drawing spirals, long strips of paper, such astelegraph messages are received on, may be coiled and markedinto divisions and then pulled out to represent the stem. Dr. Kolbe has made an ingenious device for showing phyl-lotaxy, which he has kindly described and illustrated for us. Dr. Kolbes Phyllotaxy Apparatus. Take a strip of corrugated
Plants and their ways in South Africa . rd used meaning leaf is sometimes difficult to make out on branches placed hori-zontally, as the leaves borne on the lower side turn so as toface the light. Compare them with upright branches. Instead of drawing spirals, long strips of paper, such astelegraph messages are received on, may be coiled and markedinto divisions and then pulled out to represent the stem. Dr. Kolbe has made an ingenious device for showing phyl-lotaxy, which he has kindly described and illustrated for us. Dr. Kolbes Phyllotaxy Apparatus. Take a strip of corrugated brown paper, about fourinches wide and about three yards long. Roll it up closely,but not too tightly, and paste white paper round the cylinderso formed. From the top the coil will look like this (Fig. 58)— On the outside of the white paper, divide the circumferenceinto fifths, eighths, etc., as far as you want to show the fractions 4* 52 Plants and their Ways in South Africa —fifths and eighths alone are enough for me. I mark the. Fig. 58.—Phyllotaxy apparatus. fifths with blue pencil, and the eighths with red. Side view-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1915
