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Bartlett Pear leaves.  Near Evanston Civic Center (2100 Ridge Ave., Evanston IL), 11/1/19

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leaves from a crabapple near my home; a Bartlett Pear near the Evanston Civic Center (sw entrance)

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Winnetka, IL 10/30/19

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Leaf mold produces a distinctive pattern of fall color change in Katsura Tree 

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Fall leaves of WitchHazel, Hydrangea.  Sheridan & Chicago (NU campus), Evanston.  10/29/19

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Fall leaves of ivy (Main St., Evanston), Katsura Tree (Main Library, Northwestern campus), oak (NU campus), Red maple (Winnetka Public Library).  Oct 29-30, 2019

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leaves from an ornamental cabbage (outside Whole Foods, downtown Evanston

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Amelanchier (ServiceBerry) leaves.  NU campus, Evanston

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from the NU campus (ServiceBerry, CrabApple, Hydrangea

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assorted fall leaves from my home neighborhood (near Main & Sherman, Evanston IL

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Leaves of Katsura (Cercidiphyllium) show a distinctive pattern of fall chlorosis, caused by a mold that maintains chloroplasts in the outer portion of the leaf and draws chlorophyll.  From a tree on the Northwestern Univ. campus.

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an unknown shrub. leaflets from Rhus trilobata (groundcover)

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leaves from two Hydrangea bushes on the NU campus

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vines growing along a fence behind a parking lot off Sherman Ave. in Evanston (900 block)

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leaves from Katsura (Northwestern campus, Main Library

oak (Chicago Ave. south of Dempster

Redbud

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leaves from Autumn Blaze Maple (Acer x freemani), Norway Maple

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Leaves from a TulipTree (Liriodendron tulipfera), around the corner (Elmwood Ave.) from my apartment building