xin. 



89 



A. o. 4. lobdtum, A. lobatuni Fisch., has the leaves 7-lobed, accord- 

 ing to Don's Miller, but the young plants bearing this name in the 

 Hort. Soc. Garden, which was raised from seeds received from Dr. 

 Fischer of Petersburg, appears obviously to belong to A. obtusatum. 



D. Leaves 5-, rarely 7-lobed. 



% 10. A. O'PALUS Ait. The Opal, or Italian, Maple. 



Identification. Ait. Hort. Kew., 3. p. 436. ; Dec. Prod., 1. p. 594.; Don's Mill., 1. p. 649. ; Webb Iter 



Hispan., 60. 

 Synonymes. A. rotundifblium Lam. Diet. 3. p. 382. ; A. italum Lntith Ac. No. 8. ; A. villbsum 



Presli I'E'rable Opale, E'rable a Feuilles rondes, or E'ral.le d'ltalie, Fr.; Loppo, Ital. 

 Derivation, The specific appellation of O'palus has been given to this species, probably from the 



thick opal-like aspect of the leaves. 

 Engravings. Baudril. Traite, &c., vol.5, p. 13. ; the plate of this species in Arb. Brit., 1st edit., 



vol. v. ; our fig. 135. ; and fig. 156., of the leaves, of the natural size, in the plate forming 



p. 115. 



Spec, Char., Sfc. Leaves more or less heart-shaped, roundish, 5-lobed, smooth 

 beneath ; the lobes generally obtuse, and coarsely serrated. Flowers in 

 drooping corymbs. Keys smooth. (Pen. Cyc.) A low deciduous tree. 

 Corsica. Height 8 ft. to 12 ft. Introd. 1752. Flowers whitish; May to 

 June. Keys small, brown ; ripe Sept. Decaying leaves yellowish brown. 

 A branchy tufted tree, covered with smooth leaves, somewhat coriaceous, 



roundish, indented, with five blunt lobes, deep green on the upper surface, and 



135. A^cei O'palus. 



somewhat glaucous underneath, with long red petioles. Its flowers are whitish, 

 in short racemes ; and the small fruits, or keys, which succeed them, are 

 almost round. It is found in forests and on mountains in Corsica; in Spain, 

 on the Sierra Nevada ; and in Italy, where, from the denseness of its shade, 

 it is sometimes planted by road sides, and in gardens near houses. The red 

 colour of the petioles of the leaves, of the fruits, and even the red tinge of 

 the leaves themselves, more especially in autumn, give it rather a morbid 

 appearance. It pushes later in the spring than most of the other species. 



% 11. A. CIRCINA V TUM Pursh. The round-leaved Maple. 



Identification. Pursh Fl. Amer. Sept., 1. p.267. ; Dec. Prod., 1. p. 595. ; Don's Mill., 1. p. 651. 



Tor. and Gray, l.p.247. 

 Engravings. Hook. Amer., t. 39. ; our fig. 136. ; and fig. 157. of the leaves, of the natural size, in 



the plate forming p. 116. 



Spec. Char.,$c. Leaves orbicular, rather cordate at the base, 7-lobed, smooth 

 on both surfaces ; lobes acutely toothed ; nerves and veins hairy at their 

 origin. (Uon's Mill.) A deciduous tree of the middle size. N. W. coast 

 of North America, between lat. 43 and 49. Height 20 ft. to 40 ft. In- 

 trod. 1826. Flowers with the sepals purple, and the petals white j April and 

 May. Keys purplish brown, with thin straight wings, which are so diva- 

 ricate as to form right angles with the peduncle ; the lower margin scarcely 



