CHAP. XXXVIII. ANACARDIA^CE^. DUVAU'^. 557 



s 13. R. zizy'phin A Tmeo. The Zizyphus-like Rhus, or 5'2n?j<7r^. 



Identification. Schrank in Flora, 1819, p. 3U. ; Tin. Pug. Sic, 1. p. 8. ; Dec. Prod., 2. p. 72. : Don's 

 Mill., 2. p. 75. 



Synonymes. i?h4mnus tripartita Vcria, and Zizyphus tripartita Roem. et Schulf Syst., 5. p. 342 , 

 and 6. p. 663. 



Spec. Char., SfC. Branches divaricate, bearing spines. Leaflets 3, glabrous, glossy above, wedge- 

 shaped, toothed more than half their length. Racemes terminal. [Dec. Prod., p. 72.) A shrub, 

 found in the mountainous parts of Sicily, where it grows to the height of 4 ft. Introduced in 

 1800. 



§ iv. Lohddium Dec. 



Sect. Char. Leaf of 3 leaflets, and pahnately disposed on the tip of the com- 

 mon petiole, cut in a serrate manner, the teeth large. Flowers in a dense 

 catkin. Sexes polygamous. There are two-lobed glands under the ovary, 

 alternate with the stamens. Styles 3, short, distinct. Drupe rather com- 

 pressed, villose. Nut smooth. Aromatic shrubs. {Dec. Prod., ii. p. 72.) 



a 14. R. suAVE^OLENS Ait. The sweet-scented Rhus, or Sumach. 



Identification. Ait. Hort. Kew., 1. p. 368. ; Dec. Prod., 2. p. 72. ; Don's Mill., 2. p. 75. 



SJ/nonymes. JV/yrica trifoli^ta Hortul., and, perhaps, of Lin. ; Toxicodendron cren4tum Mill Diet 

 No. 5. ' 



Spec. Char., SfC. Leaflets oval, a little angular in the middle, glabrous. (,Dec. Prod., ii. p. 72, 73.) A 

 native of Carolina, where it grows to the height of 6 ft., and produces its greenish-yellow flowers in 

 May. It was introduced in 1759, but is not common in collections; is, in all probability the same 

 as the following sort. „^^ ' 



ai 15. R. (s.) aroma'tica Ait. The aromatic Rhus, or Sumach. 



Identification. Ait. Hort. Kew., 1. p. 367. ; Dec. Prod., 2. p. 73. ; Don's Mill., 2. p. 75. 

 Engraving. Turp. in An. du Mus. 5. p. 445. t. 30. 



Spec. Char., Src. Leaflets oval, a little angular in the middle, pubescent in a 

 pilose manner. (Dec. Prod., ii. p. 73.) A native of North America, in 

 Kentucky, and from Pennsylvania to Carolina, where it grows to the 

 height of 6 ft. Introduced in 1772. Nuttall has stated that the drupes are 

 acid and eatable. The flowers are yellow, in dense terminal spikes. The 

 plant in the Horticultural Society's Garden was, in 1834, 4 ft. high, after 

 being 10 years planted. 



App. i. Other Species ofR/ms, hardy and half-hardy. 



In Don's Miller, ninety-seven species of this genus are described ; but, if it were possible to bring 

 them all together, and cultivate them in the same garden, we question much if there would be found 

 more than a fourth part of them entitled to be considered specifically or permanently di.stinct. We 

 judge of those which we have not seen from those which we have observed for years in British gar. 

 dens ; and, as as we feel quite confident that R. typhina, R. viridiflbra, and R. glabra are one and 

 the same species, and R. Toxicodendron and R. radicans are also only one species, so we do not think 

 it likely that the species, or names given as species, under the other sections, are more distinct. It 

 is the business of botanical writers, however, to record all these names with their descriptions ; and 

 of cultivators, to endeavour to procure them for their gardens, in order to compare them together ■ 

 for which last reason we subjoin the following names : — ' 



'R.lobata Hook. [Fl.Ror. A mer.,i. p.127. t. 46.) is a very handsome species, or perhaps only a tolerably 

 distinct variety, closely resembling R. Toxicodi?ndron var. ^uercifolium, at least, as the plant bearing 

 that name appears in the garden of theLondon Horticultural Society. Dr. Hooker says, " Although 

 nearly allied as this [i?. lobJlta] is to the two preceding species [if. radicans and R. Toxicodendron] 

 I nevertheless venture to consider it distinct. Its general habit is very diflferent, having erect 

 straight stems, and numerous small leafy branches. The leaflets, besides that they are deeply lobed 

 with acute sinuses, are truly ovate, very obtuse, and greatly smaller than in any state of R. Toxico- 

 dendron or R. radicans which I have seen : the panicles, too, are exceedingly numerous, and large in 

 proportion tothe size of the leaf" {Ft. Bar. Amer., i. p. 127.) The shrub was discovered by Douglas 

 on the outskirts of woods in dry soils in North-west America, particularly at Fort Vancouver. It is' 

 not yet introduced, but appears to be a very desirable variety. 



R. acuminata Dec. {Don's Mill., ii. p. 70.), a native of Nepal, and hardy ; not yet introduced. 



R. Amfela D. Don (Don's Mill., ii. p. 12.), the 7?. Bucku-Amila of Hort. Brit., is a 'Nepal tree 

 growmg to the height of 4 ft., with dioecious flowers, disposed in large terminal spikes. It is marked 

 as having been introduced in 1823, and as requiring the protection of a frame. It seems a most de- 

 sirable species ; but we have not seen it. 



R. bahumensis G. Don {Don's Mill., ii. p. 72.) is a climbing shrub, a native of the Bahama Islands, 

 not yet introduced, probably only a modification of R. radicans. 



R. Oxyaciintha and R. oxyacanthiitdes of Hort. Brit., {the R. Oxyacantha and R. dioica of Don's 

 Miller, the first introduced in 1823, and the last in 1825, are considered hardy ; but they are rarely to 

 be met with in gardens. (See,'also, several species enumerated under Anacardiacea; of the Himalaya 

 p. 174.) 



The frame and green-house species of ^hus are numerous, as will be seen by a glance at our 

 Hort. Brit., p. 110. When tried in the open air, many of them will probably be found hardy, and 

 perhaps all of them half-hardy. R. heierophylla, generally kept in the green-house, was planted 



