Botanist Gerry Firkins, from Sorby Natural History Society, leads regular tours around the city looking at plants and trees, and one of his interests is winter twigs. “It’s about looking ...

American Journal of Botany, Vol. 15, No. 5 (May, 1928), pp. 337-344 (8 pages) 1. Individual twigs of dormant lilac plants growing in pots were exposed to vapors of ethylene chlorhydrin, ethylene ...