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Jepson Field Book volume 15 page 154 | University and Jepson Herbaria Archives, University of California, Berkeley

Jepson Field Book volume 15 page 154
Konigliches Bot. Mus. Berlin  F. Pax, Aceraceae, Pflanzenreich.    Acer. divided into 13 sections W. Am. = A. Fls. app. with leaves or slightly earlier.    disk well-developed; interior bud scales elongating.    a. Sepals free; petals evolute.        Sect. I. Spicata. A. macrophyllum.        Sect II. Palmata. A. circinatum.        Sect VII. Glabra. A. glabrum.    b. Sepals connate; petals none.        Sect. XIII. Saccharina. A. grandidentatum Nutt. B. Fls. appearing long before the leaves; disk much reduced;    inner bud scales not elongating.        Sect. VII. Negundo. A. Californicum. Dietr ---------- = A. macrophyllum Pursh. var. imbricatum OK. Wings erect, ::::::::: April 2, 1906  partly imbricated. = A. circinatum Pursh. Wings horizontal. = A. Californicum Dietr. (Neg. Calif. T. & G.)  Pax separates this from A. Negundo as follows:  A. Negundo, adult leaves below glabrous or pilose; young      branches most often glabrous, pruinose; style hidden.  A. Californicum, adult leaves densely pubescent below; young      branches pubescent (densely cinerous); style not parted      wholly to the base. (Test out above; I am skeptical.) = A. grandidentatum. Rocky Mts. Does it come into Oregon?  Sargent refers it as a var. of barbatum, Sudworth of  saccharum. = A. glabrum Torr. Two vars: var. monophyllum Graf um [?]  Schwerin, which is the var. typicum. and var. tripartitum  (Nutt.) Pax. He (Pax) makes the
University and Jepson Herbaria Archives, University of California, Berkeley
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