Late summer grafting is not practical because the scions which make a start do not lignify their new shoots sufficiently to withstand the winter cold.    From Wordnik.com.  [Northern Nut Growers Association Report of the Proceedings at the Eleventh Annual Meeting Washington, D. C. October 7 and 8, 1920] Reference

In the north where the warm season is not long enough to allow the autumn sprout to lignify sufficiently for bearing the rigors of winter it is killed.    From Wordnik.com.  [Northern Nut Growers Association, Report of the Proceedings at the Seventh Annual Meeting Washington, D. C. September 8 and 9, 1916.] Reference

I noticed that some small branches of the Persian walnuts had been injured, and particularly where grafts had started a little late and had not lignified quite thoroughly I lost whatever grafts had not had time to lignify.    From Wordnik.com.  [Northern Nut Growers Association, Report of the Proceedings at the Third Annual Meeting Lancaster, Pennsylvania, December 18 and 19, 1912] Reference

If plants which do not lignify for winter manage to direct successful wound repair after grafting and if plants which do lignify for winter do not conduct successful repair of grafted new growth it occurred to me in a speculative way that the reason might perhaps be sought in the nature of the two different kinds of hormones or of enzymes belonging to annuals and to perennials respectively.    From Wordnik.com.  [Northern Nut Growers Association Report of the Proceedings at the Twenty-Fourth Annual Meeting Downington, Pennsylvania, September 11 and 12, 1933] Reference

So our poets ufed the word boufehold to lignify a family living together: Thus.    From Wordnik.com.  [An Estimate of the Comparative Strength of Great Britain, During the Present and Four Preceding ...] Reference

Dehiscence is controlled by a set of transcription factors that define the fruit tissue layers and whether or not they lignify.    From Wordnik.com.  [BioMed Central - Latest articles] Reference

Denote the f\r (i or kil firft Ditference by b, the firft or till fecnnd Difference by c; according ns the Interpoliiioii to be made is for Ihe firil or Lift 12 Hours, denote alfo the third Diiference by d; and, a being put b lignify the Diftancc at the Beginning of the Interval, Ih§ in.    From Wordnik.com.  [The nautical almanac and astronomical ephemeris for the year ..] Reference