40S CLASS XXIII. ORDER II. 



Acer montanum. L. Mountain Maple, 



Leaves about five lobed, acute, toothed, pubescent, 

 underneath ; racemes erect, compound. 



A shrub with pale greyish bark. Leaves three or five lobed, 

 toothed, rugose, slightly pubescent underneath. Racemes erect 

 with compound branches. Calyx segments short, acute. Petals 

 five, linear, greenish white. Stamens shorter than the petals; 

 anthers yellow. Germ compressed, inversely heart shaped or 

 triangular. Style erect. Fruit winged, in compound, pendulous 

 racemes. — Woods in the interior of Massachusetts, &:c. — June. 



418. NYSSA. 

 NvssA viLLosA. Midi. Tupelo Tree. Swamp Hornbeam. 

 Leaves oval, entire, the petiole, middle nerve, and 

 margin villous ; fertile stalks about three flowered ; 

 nut short-obovate, obtusely striate. Midi. 



This tree grows in swamps, and is frequently of a pyramidal 

 form, with horizontal branches. The leaves are oval, entire, 

 acute, tough and firm, paler on the under side, slightly pubescent 

 on the margin and petiole, two or three inches in length. The 

 flowers are small, obscure, of a green color, collected on the end 

 of a long peduncle. Each fertile peduncle produces two or three 

 small, oblong drupes, of a deep blue color, each containing an 

 exceedingly hard, striated stone. 



The wood of this tree is white, and moderately hard. Its 

 fibres are closely interwoven, so as to render it extremely tough 

 and difficult to split. In Massachusetts it is generally called 

 Hornbeam, a name properly belonging to the genus Carpinus. 



419. FRAXINUS. 

 Fraxinus Americana. Mich. f. White Ash. 



Leafets elliptic, acuminate, slightly toothed, petio- 

 led, glaucous underneath. 



Syn. Fraxinus discolor. Muhl. 



Fraxixus acuminata. Lam. 



This very valuable tree grows to the height of seventy or 



