. Plant studies; an elementary botany. Botany. 92 I'LAKT STUDIES As is well known, when a seed germinates the tip that is to develop the root turns towards the earth, even if it has come i'rom the seed in some other direction. This earth inllnence is known as (jeotroplsin. Another directing" in- lliience is moisture, or the water influence, known as hijdrot- l^-~~^ r. Vn;. sr. A srctinn tliriiiiuli the IcMf-stalk nf a yiAitny iJOiHl-lily iXiip/iai), Rluraing the nnnicrniis cfnispiiiioiis air ]ia^'s (,s'l tiy means of which the parts iliaier waler are arrateil ; /;, inhaiial liaiis ii
. Plant studies; an elementary botany. Botany. 92 I'LAKT STUDIES As is well known, when a seed germinates the tip that is to develop the root turns towards the earth, even if it has come i'rom the seed in some other direction. This earth inllnence is known as (jeotroplsin. Another directing" in- lliience is moisture, or the water influence, known as hijdrot- l^-~~^ r. Vn;. sr. A srctinn tliriiiiuli the IcMf-stalk nf a yiAitny iJOiHl-lily iXiip/iai), Rluraing the nnnicrniis cfnispiiiioiis air ]ia^'s (,s'l tiy means of which the parts iliaier waler are arrateil ; /;, inhaiial liaiis iirnjeelin^ into tlie air jaissa^'es ; r, tlie uincli rediifeil and eninparalively few \asenlar laindlrs. ropism. By means of this the root is directed towtirds the most fa,vorahle water supply in the soil. Ordinttrily. gcdtrojiisnr ;ind hydrtif ropism direct the root in the same general wa,y, sk reinforce I'tich otluT ; hut the following cxpci'liiieut may he arrtingcd. which will separate these two inlliicnces. Ilorc scverttl small holes iu the Ijottom of ii, (such tis ti cigar liox), stispendcd as in- dicated iu Figure ;i, aJid cover the hottom with hlottiug ])aper. Pass the root tips of several germinated seeds. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1900
