By Mel, Kansas (Mehollop) on Sunday, October 9, 2005 - 11:28 am:
John & Anne of Kentucky:
That is indeed true! All leaves start out with the pigments that we associate with their fall color. The chlorophyll used to aid in photosynthesis throughout the growing season is a much brighter, more vibrant color, so it covers those other pigments up. When the tree slows down and halts photosynthesis for the season, the chlorophyll fades, and allows those other pigments to show their own colors.
Purple leaves are not too uncommon - white ash will often go purple in the fall, as will some oaks (including northern red, as seen above).
Now me, I'm not getting that nice rainbow effect in the leaves here - mostly just sickly yellows, and no red. :( The tallgrass prairies should start to turn soon though, and those eventually look like a carpet of fire. I guess it's not all bad!
By Thomas Baird (Thomas) on Wednesday, October 1, 2008 - 04:10 pm:
I like that Deck of leaves pic.