48 ACER. 



branous 5 toothed, no petals, stamens 4 to 6 

 without glands, fruit hairy, flowers glomerate, 

 leaves palmate or angular. 8 A. dasycarpum, 

 and a N. Sp. from Oregon. 



9. A. V iRGATUM Raf many stems and branch- 

 es virgate, leaves on long petiols, rounded an- 

 gular crenate acute. — Mentioned by Lewis and 

 Clarke as a small white maple, bark white: 

 perhaps another Var of A. circinatmn, but our 

 white maple is the dasycarpum. Seen dry, 

 without flowers. 



V. Negundo or Negundium Raf 1808. Dec. 

 Beck. Dioical, without complete flowers. Cal. 

 minute 4-5 dentate, no petals, anthers 4 to 5 

 sessile, fruit smooth, flowers racemose pendu- 

 lous, leaves* pinnate or ternate. 10. A, or N. 

 fraxlnifolium, leaves ternate and pinnate, fo- 

 lioles unequally dentate, the last trilobed. — 11 A. 

 or N. TRiFOLiATUM Raf. fl. Tex. 8. leaves ter- 

 nate, folioles ovate oblong entire, smooth, acute, 

 the last 3dentate. — In Texas and Arkansas, 

 branches green, flowers 4androus. Seen dry. 

 figure Autikon rare. Ic. N. Sp.— 12 A. or N. 

 lobatum Raf. leaves nearly simple, triparted or 

 trilobed, sublaciniate. Apalachian Mts. Seen 

 alive, figure Autikon rare. Ic. N. Sp. 



VI. Sphendamus Raf. (old name) Dioical, 

 Cal. 6 parted, no petals, stamens 9, long hairy, 

 fruits hairy? flowers in erect racemes, leaves 

 digitate. 13. A. macrophylum Pursh. leaves 

 digitate hairy beneath, segments trilobed, re- 

 pand dentate. In Oregon, and another N. Sp. 

 or Var. 14. A. palmatum Raf. leaves wide 

 palmate, Sparted, smooth, segments 3 or 5 fid, 

 lobed and dentate. On the R. Oregon, leaves 

 on loPgpetioJs ^^v^} to ^.^r;e5,^MY a.rt birs^f^r 

 than lor^Q, la Lncher ^'idr.. slon^^^ ::uc 4>o 



