The following was received via email: I have two Acer pectinatum subsp. forrestii, growing here in Oklahoma, but some photos, do not look like my plants, they have very red stems and petioles, but my plants have single lobe leaves. The photo of your plant at UBC shows minor lateral lobes to the leaf. My plants also show the long arching branches that your plant has (best seen in this photo from Davidsonia. One plant was received from Ok. State Un. and was named Acer caudatum, Ung. and the other I purchased from Heronswood. In the book Maples for the Garden, by van Gelderen, A. pectinatum subsp. forrestii looks like your plant, while the more narrow leaf without a lateral lobe looks like A. pectinatum subsp. maximowiczii, but van Gelderen, does not mention red branches, stems, and petiole associated with A. pectinatum subsp. maximowiczii. I have written to Dan (Hinkley at Heronswood) about this but since we don't have leaves on the tree at this time, he has not responded. Thanks for you thoughts and time.