A practical course in botany : with especial reference to its bearings on agriculture, economics, and sanitation . )oint of attachment of thetuber to its stem and stantlit on this end, which is itsnatural base. Notice thatthe eye sits in the axil ofthe little scale that formsthe eyelid. What does thescale represent? WTiat is. Fig. U)( )cr showing Iciiti- cels, A, A, or pores for air ou the surface ;<S, leaf scale, or scar. the eye? (100.) Do thescales occur in any regular order — that is, opposite, or alternating with, each other, like the leaves on a stem ? Look on the surface for a number
A practical course in botany : with especial reference to its bearings on agriculture, economics, and sanitation . )oint of attachment of thetuber to its stem and stantlit on this end, which is itsnatural base. Notice thatthe eye sits in the axil ofthe little scale that formsthe eyelid. What does thescale represent? WTiat is. Fig. U)( )cr showing Iciiti- cels, A, A, or pores for air ou the surface ;<S, leaf scale, or scar. the eye? (100.) Do thescales occur in any regular order — that is, opposite, or alternating with, each other, like the leaves on a stem ? Look on the surface for a number of small, lens-shaped dots (A, A, Fig. 106) scattered irregularly over it. These are aerating pores called lenticels, and are found in most dicotyl stems. Does their presence help to throw light on the real nature of the tuber? If any sprouts occur on your specimen, where do they originate? Where do buds and sprouts originate on plants above ground ? Make a sketch of the outside of a potato, showing the lenticels, eyes, and scales, or the scars left by the scales in case they have fallen away, as has probably happened, if your specimen is an old one. Cut a small slice from the stem end of two potatoes, stand
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisher, booksubjectplants
