2S2 tEiAFLEifg. 



in all particulars of specific character, while the fruit-clusters 

 are the largest in the genus, far surpassing those of the great- 

 leaved Oregonian tree. I should hold as typical of the species 

 the specimens of Brewer, U. S. Herb, sheets 321447 and 

 321448. The Calistoga tree of Pringle, U. S. Herb, sheet 

 17948, differs somewhat, its racemes being distinctly pendulous 

 in fruit, and the samaras are rather smaller. 



Acer stei,i,atum. Leaves small, the largest 4 inches wide 

 and as long, those of the flowering twigs^even smaller, the 

 5 lobes somewhat stellately radiating, lanceolate, acuminate 

 and entire in the floral twigs, in the others widening upwards 

 and 3-lobed at apex, the upper face of all leaves glaucescent- 

 green and minutely setulose-roughened, the lower light-green, 

 finely reticulate, very minutely if at all roughened with 

 hair-points : racemes short, few flowered ; samaras 1 V^ inches 

 long, suberect, the broad wings nearly meeting. 



Cache Creek Canon, Yolo Co., 8 May, 1903, C. F. Baker, 

 his n. 2981 as in U. S. Herb., distributed with the printed 

 note : "A small tree common along canon walls and in adja- 

 cent gulches. Quite different in appearance from the form of 

 the redwood districts." 



Acer hemionitis. Branches of the season green , glaucous, 

 those of the preceding two years still green-barked, but with- 

 out bloom : leaves not large, 4 or 5 inches long, of about the 

 same breadth in the middle, palmately 5-parted, the sinuses 

 rather narrowly and acutely V-shaped, the 3 principal seg- 

 ments subrhomboid-lanceolate, neither toothed nor yet entire, 

 the margin only repand or wavy, the basal segments of the 5 

 small, nearly or quite entire, upper face of leaf sparsely muri- 

 culate within the meshes of the reticulation, and with very 

 few bristly short hairs on the veinlets, the lower face only 

 minutely and somewhat granulately roughened, the ciliation 

 of the segments light and inconspicuous : samaras only 1 inch 

 long, the body sparsely long-setose, and with an obscure yet 



