384 IIEPTANDR[A. MONOGYNIA. trientalis. 



The North-American variety of this plant is considered as a 

 distinct species hy F ti r s h, but having compared it with spe- 

 cimens of T. europxa^ from several parts of the old world, I 

 find no difference sufficient to constitute it more than a variety. 

 In my Swedish specimens, the leaves are as narrow as in our 

 own plant. Whether the character of the oblique leaves exist 

 in the T. europcsa or not, I am unable to decide. 



265. ^SCULUS. L, 



Calyx 1-leaved, 4 — 5-toothed, ventricose. Corolla 

 4 — 5-petailed ; petals unequal, pubescent, inserted 

 upon the calyx. Capsule S-celled. Seeds large, soli- 

 tary, fjen. pi. 628. JYutt. Gen. I. ip. 242. Juss. 

 p. 251. Lam. III. t. CCLXXIII. Nat. Ord. 

 Ac E R A c EM Ju ss, Horse-cliesmit. — Buck-eye^ 



M. glabra W il, I d. : leaves quinate, very smooth ; co- 

 rolla 4-petalled, spreading, with the claws as long as the 

 calyx ; stamens longer than the corolla ; fruit spinous, 

 Willd. Enum. Hort. Berol. I. p. 405. Pursh FL I. \). 

 255. M. echinala M uhL Caf. p. 38 ? Pavia ohioensis 

 Mich. f. Arh. U. p.2l7. t. 92. 



A large shrub or small tree, with a soft white wood. Leaflets 5., 

 unequal, oval, acuminate, 9—10 inches long. Flowers large, 

 yellowish-white, in terminal racemose panicles. Fruit glo- 

 bose, about half as large as the common Horse-chesnut, covered 

 with short prickles. 



Had. In the western counties of Pennsylvania. Pursh, May. 



