S A P I N D A C E iE. 259 



3. Acer glabrum, Tor v. 



Acer glabrum, Torr. in Ann. Lye. New York, 2, p. 172; Torr. & Grav, PL 1, p. 



247 ; Nutt. Sylv. 2, p. 86. 

 A. barbatum, Dougl. in Hook. PL Bor.-Amer. 1, p. 113, excl. syn. 

 A. Douglasii, Hook. Lond. Jour. Bot. 6, p. 77, t. 6. 



* 

 Hab. Between the Upper Columbia and the Cascade Mountains. — 



A shrub 6 to 12 feet high (10 to 20 feet, according to Oeyer), forming 

 patches. Leaves 3-5-lobed, pale and glaucous underneath. Flowers 

 not seen. Fruit in a loose, erect, compound umbel. Pedicels elon- 

 gated. Wings of the samara mostly approximated or even overlap- 

 ping. . 



On the sides of the Cascade Mountains, Dr. Pickering found a 

 Maple in fruit, which seems to be almost intermediate between A. 

 glabrum and A. circinnatum. 



2. NEGUNDO, Moench. 



1. Negundo aceroides, Mcench. 



Negundo aceroides, Moench. Method, p. 334; Torr. & Gray, Fl. 1, p. 250. 

 N. fraxinifolium, Nutt. Gen. 1, p. 253; Hook. Fl. Bor.-Amer. 1, p. 114. 

 N. Calif ornicum, Torr. & Gray, 1. c. & Suppl. p. 684 ; Hook. & Arn. Bot. Beech, 

 p. 327, t. 77 ; Nutt. Sylv. 2, p. 90, t. 72. 



Hab. Banks of the Sacramento, and near San Francisco. — A tree 

 40 feet high, with a trunk two and a half feet in diameter. The 

 leaves are often trifoliolate. The leaflets are usually more pubescent, 

 rather broader, and more incised than in the eastern plant, but in the 

 flowers and fruit there is no difference. N. Mexicanum, DC. should 

 also probably be united to this species. 



