ACERINEJG. I. ACEE. II. NEGUNDO. III. DOBINEA. HIPPOCASTANE&. 



651 



oblong, acuminated, serrated; umbels 5-7-flowered. J?. H. 

 Native of Japan. Tratt. arch. 1. no. 17. with a figure. Flowers 

 greenish-yellow ? 



Palmate-leaved Maple. Fl. May. Clt. 1820. Tree 20 ft. 



35 A. SEPTE'MLOBUM (Thunb. fl. jap. p. 162.) leaves smooth, 

 7-lobed ; lobes acuminated, equally and acutely serrated. Tj . H. 

 Native of Japan. 



Seven-lobed-\ea\ed Maple. Fl. May. Tree 40 feet. 



36 A. PI'CTUM (Thunb. fl. jap. p. 1 62.) leaves smooth, pal- 

 mately 7-lobed ; lobes acuminated, entire. Tj . H. Native of 

 Japan. Tratt. arch. 1. no. 15. with a figure. Branches ash- 

 coloured. Leaves variegated with white. 



Painted-leaved Maple. Tree 30 feet. 



37 A. CIRCINA'TUM (Pursh. fl. amer. sept. 1. p. 267.) leaves 

 orbicular, rather cordate at the base, 7-lobed, smooth on both 

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

 origin. Jj . H. Native of North America on the great rapids 

 of the Columbia river and of Northern California. This beau- 

 tiful species has leaves the size of A. rubrum. The disposition 

 of the flowers is unknown, therefore it is doubtful whether it 

 belongs to this section. 



Round-\ea\ed Maple. Tree 56 feet. 



38 A. LOBA'TUM (Fish. mss. Loud. hort. brit. p. 412.) leaves 

 7-lobed. ^ . H. Native of Siberia. This species is extremely 

 doubtful. Disposition of flowers unknown. 



Lobed-leaved Maple. Clt. 1820. Tree. 



* * Leaves trijid or undivided. 



39 A. TRI'FIDUM (Thunb. fl. jap. p. 163.) leaves undivided 

 and trifid, entire.. fj . H. Native of Japan. The twigs are 

 smooth and purplish. 



7Vi/W-leaved Maple. Tree 20 feet. 



Cult. Maples are for the most part trees of considerable 

 size and beauty, and are chiefly used for plantations or avenues 

 or the backs of shrubberies. Most of them will grow from 

 cuttings, which should be taken off at a joint, and planted in a 

 sheltered situation in the open air, the earlier in autumn this is 

 done the better, particularly if the weather be moist ; Mr. Sweet 

 recommends the cuttings of most hardy trees and shrubs to be 

 planted about the same time, as they succeed much better than 

 if they are planted in spring, the usual time ; the ground should 

 be well fastened about them, so that the worms and frost may 

 not loosen them. They may be also increased by layers put 

 down in the autumn. The seeds of this genus should be 

 sown if possible soon after they are gathered from the tree, 

 because if sown then they will vegetate next spring, but if kept 

 till spring few of them will vegetate the first year ; these should 

 be sown in a bed prepared for the purpose, and they should be 

 covered over about an inch thick of mould ; this bed should be 

 dressed in spring before the plants make their appearance, and 

 when the trees are of a sufficient size, which is generally after a 

 year's growth, they should be planted out in rows, there they 

 may remain until they are of sufficient size to be planted out 

 into plantations or shrubberies. 



II. NEGU'NDO (meaning unknown). Mcench. meth. 334. 

 D. C. prod. 1. p. 596. Negundium, Rafin. A'cer. spec. Lin. 



LIN. SYST. Dioecia, Pentandria. Flowers dioecious. Calyx 

 small, unequally 4-5-toothed. Petals wanting. Male flowers 

 in fascicles, on filiform pedicels. Anthers 4 or 5, linear, sessile. 

 Female flowers in racemes. Trees with impari-pinnate or trifo- 

 liate leaves. 



1 N-FRAXiNiFoiruM (Nut. gen. amer. l.p.253.) leaves pinnate, 

 with 3 or 5 opposite, coarsely and deeply- toothed leaflets, with 

 the odd one usually 3-lobed. Jj . H. Native of North America 

 on the banks of rivers from Pennsylvania to Carolina. A'cer 



Negundo, Lin. spec. 1497. Mich. fil. arb. 2. t. 16. Tratt. 

 arch. 1. no. 10. with a figure. Wangh. amer. t. 12. f. 20. N. 

 aceroides, Mcench. meth. 334. Flowers green. The tree is 

 commonly called Box-elder or Ash-leaved Maple. 



Var. /3, crispa ; leaflets curled. 



Ash-leaved Negundo. Fl. May, June. Clt. 1688. Tr. 40 ft. 



2 N. MEXICANUM (D. C. prod. 1. p. 596.) leaves all trifo- 

 liate. J?. H. Native of Mexico. A'cer ternatum, Moc. et 

 Sesse, fl. mex. icon. ined. Perhaps this is only a variety of the 

 preceding species. Flowers green. 



Mexican Negundo. Tree 40 feet. 



3 N. COCHINCHINE'NSE (D. C. prod. 1. p. 596.) leaves pin- 

 nate, usually with 4 pairs of alternate quite entire leaflets, and 

 an odd one. Jj . H. Native of Cochin-china in woods. A'cer 

 pinnatum, Lour. fl. coch. 649. Petals 5, white. Wings of 

 fruit fleshy. This may probably form a separate genus of 

 Sapindacece, the stamens being 8. The wood is very hard. 



Cochin-china Negundo. Tree 25 feet. 



Cult. These trees are well adapted for the backs of shrub- 

 beries. Cuttings taken off at a joint, and planted in a sheltered 

 situation early in autumn will strike root. They may be also 

 increased by layers put down at the same time, or by seeds. 



III. DOBFNEA (an alteration from the Nipaulese name of 

 the shrub). Hamilt. mss. D. Don, prod. fl. nep. p. 249. 



LIN. SYST. Monoecia, Monadelphia. Flowers monoecious. 

 Male flowers with a 1 -leaved, 4-toothed, campanulate calyx. 

 Stamens 8, joined into a column about the sterile style, 4 of 

 which are shorter than the rest. Petals 4, oblong, unguiculate. 

 Female flowers without a calyx or corolla. Ovary 1 -seeded. 

 Style crowned by a blunt stigma. Capsule compressed, with a 

 winged margin, 1-celled, 1-seeded, sitting on the middle of a 

 leafy pedicel. Seed flat. Albumen wanting. Shrub with sim- 

 ple leaves. 



1 D. VULGA'RIS (Hamilt. rnss. in D. Don, prod. fl. nep. p. 

 249.) Tj . H. Native of Nipaul at Narainhetty. Shrub 

 branched ; branches pubescent. Leaves elliptical, oblong, 

 acutely serrated, hairy on both surfaces, acuminated and entire 

 at the apex, 4-6 inches long, and about 2 in breadth. Flowers 

 minute, loosely panicled, terminal, with pilose peduncles ; female 

 one's on leafy coloured pedicels. 



Common Dobinea. Fl. Aug. Shrub 6 feet. 



Cult, It is probable that the treatment and manner of pro- 

 pagation recommended for Negundo will answer this shrub. 



ORDER XLVII. HIPPOCASTA'NEiE (this order only con- 

 tains the horse-chesnut). D. C. theor. ed. 2. p. 244. prod. 1. 

 p. 597. Castaneaceaa, Link, enum. 1. p. 354. ^'sculus, Lin. 

 gen. no. 462. 



Calyx campanulate, 5-lobed. Petals 4 or 5, unequal, hypo- 

 gynous. Stamens 7-8, inserted in the hypogynous disk, free, 

 unequal. Anthers rather incumbent. Ovary roundish'-trigonal. 

 Style 1, filiform, conical, acute. Younger capsules 3-celled, 3- 

 valved, each cell containing 2 ovulae, with a dissepiment in the 

 middle of each valve, which the ovulae are fixed to ; adult cap- 

 sules coriaceous, rather globose, 2-3-celled, 2-3-valved, 2-4- 

 seeded. Seeds large, somewhat globose, variously compressed 

 and angled, covered by a very smooth, shining, ferrugineous 

 shell, with a broad, cinereous-brown, basilar hilum. Albumen 

 wanting. Embryo curved, inverted, with fleshy, thick, gibbous 

 cotyledons, which are soldered together, through germination, 

 within the seed cover. Plumule large, 2 -leaved. Radicle 

 4o 2 



