WENATCHEE, Wash. – Last fall, my friend Lee Kalcsits and I went exploring in the apple orchards of Wenatchee. The apples were ripe and the leaves were changing from green to gold. We plucked a few leaves and took them back to his lab.
“You know, if you take a stem, pull away all the mature leaves and slice it from the top down, you can look at it under the microscope,” said Kalcsits, a scientist at Washington State University in Wenatchee who studies all kinds of trees.
“What it looks like is these tiny, moon-shaped leaves,” he said. “They get smaller and smaller until you get this dome-shaped structure and that’s the meristem.”
The meristem is the part of a plant where leaves begin to form, he explained.
Read all of this answer from Dr. Universe at https://askdruniverse.wsu.edu/2016/02/01/how-do-leaves-make-themselves/.
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