Iron County Record | 1934-07-12 | Page 4 | Nutation Twists Viane

I N Twit YIt Vi The Tb tendency of or certain vines In to twist and I end hend Is I. due to a character Istle known as II The tend lend ency ri 1 i to- to irow mak makes the In In fonn to jV the casee III orr of hollow stem hollow stem vines like the morning glory Ilor for tor Instance instance In In- tan stance this Ibl growth tendency or the stimulation of or U travels around the stem teDI with the result that the stem Im Is la constantly twisting as a. It lengthens In the case rue of or certain plants such as II the crocus crotus and anI nd the tulip the lb petals petal art are very susceptible to temperature changes When hD It U Is I. warm the outer I side aide of or the petal grows taster faster caus CIU causIng causIng Ing In the blossom to open but bUI with lowered low I trod red temperature the petals petal see are drawn II I together This of or course explain I the owning opening and closing of the Ibe flow I era night and morning