90 



ARBORETUM ET FRUTICETUM BRITANNICUM. 



156. A^cer circinktum. 



thickened. {Tor. and Gray). Decaying leaves of a fine reddish yellow. 

 Naked young wood reddish brown. 



Branches slender, pendulous, and crooked ; 

 often taking root, in the manner of those of 

 many species of Flcus. Bark smooth ; green 

 when young, white when fully grown. Leaf 

 the length of the fingpT, upon rather a short 

 footstalk, membranaceous, heart-shaped, with 

 7 9 lobes, and 7 9 nerves ; smooth above, 

 except hairs in the axils of the nerves ; downy 

 beneath, and in the axils of the nerves woolly: 

 lobes ovate, acute, and acutely serrated ; the 

 sinuses acute : the nerves radiate from the tip 

 of the petiole, and one extends to the tip of i 

 each lobe. Flowers of a middling size, in 

 nodding corymbs, that are on long peduncles. 

 ( HooJc. Fl. Bor. Amer.) This is a very marked 

 and beautiful species; distinguishable, at sight, by the regular form of its 

 leaves, and their pale reddish green colour. Though this fine tree has been 

 in the country since 1826, it seems to have been comparatively neglected, for 

 there is no good specimen that we know of in the neighbourhood of London. 

 At High Clere, a thriving tree has ripened seeds for some years past; so that 

 there can be no doubt of its hardiness. 



Sk 12. A. palmaVum Thunh. The palmate-Zeawerf Maple. 



Identification. Thunh. Fl. Jap., p. 161. ; Dec. Prod., 1. p. 595. ; Don's Mill., 1. p. 6.50. 

 Engravings. Tratt. Arch., 1. No. 17. ; and fig. 158. of the leaves, of the natural size, in the plate 

 forming p. 117. 



Spec. Char., Sfc. Leaves smooth, palmately divided into 3 7 lobes down 

 beyond the middle ; lobes acuminated, oblong, serrated. Umbels 5 7- 

 flowered. (Bon's Mill.) A low. deciduous tree; in England a rather deli- 

 cate shrub. Japan. Height in Japan, 20 ft. Introd. in 1820. Flowers 

 greenish yellow and purple ; May. Keys ?. Decaying leaves reddish yellow. 



This species requires the protection of a wall; having been, like A. oblongum, 

 killed to the ground in the open air, in the Hort. Soc. Garden, in the winter 

 of 1837-8. 



1 13- A. erioca'rpum M'whx. The hairy-fruited, or white. Maple. 



Identification. Michx. Fl. Amer. Bor., 2. p. 213. ; Don's Mill., 1. p. 6.50. 



Synonymcs. A. da.sycarpum IVilld. Spec. 4. p.OS.I., Tor. S; Gray, 1. p. 248. ; A. toment&sura 

 Hort. Par. ; A. glaucum Marsh. ; A. virginia.num Ditk. ; A. rdbrum fVangenh.; white, silver- 

 leaved, or soft. Maple, United States ; Sir Charles Wager's Maple ; E'rable a Fruits cotonneux, 

 or F/rable blanc, Fr. ; rauher Ahorn, Ger. ; Acero cotonoso, or Acero bianco, Ital. 



Engravings. Desf. Ann. Mus., 7. t. 25. ; the plate of this species in Arb. Brit., 1st edit, vol. v. ; 

 oarfig. 137. ; and fig. 1-59. of the leaves, of the natural size, in the plate forming p. 118. 



Spec. Char., <^c. Leaves truncate at the base, smooth and glaucous beneath, 

 palmately 3-lobed, with blunt recesses, and unequally and deeply toothed 

 lobes. Flowers conglomerate, on short pedicels, apetalous, peiitandrous. 

 Ovaries downy. (Don's Mill.) A middle-sized tree. North America, from 

 lat. 43" to Georgia. Height in America 10 ft. to 40 ft. ; in England 30 ft. 

 to 30 ft. Introduced in 1725. Flowers small, pale yellowish purple; 

 March and April. Keys brown ; ripe in July, 



Varieties. There are several names in nurserymen's catalogues, such as A. 

 coccfneum, A. macrocarpum, A. floridum, A. Pav/ which are only very 

 slight varieties of A. eriocarpum. The last-named variety, introduced by 

 Messrs. Booth, has received the absurd name of Pavia^ from the upper 

 surface of the leaves being slightly wrinkled, somewhat in the manner of 

 those of the horsechestnut. As the species seeds freely, endless varieties 

 mav be obtained from .seed beds. 



