548 ARBORETUM AND FRUTICETUM. PART IIL. 
Description, §c. The species bears a gene- 
ral resemblance to the two preceding ones, 
in summer, when they are clothed with foliage ; 
but it differs from them in being evergreen, and 
in having the leaves much smaller. Fabricius 
has observed that the male plant sometimes 
produces hermaphrodite flowers, with three sta- 
mens and five styles. Gouan has remarked 
that the buds in this species are different from 
what they are in the other sorts; the branch- 
bearing buds being terminal, and the flower buds 
axillary. The leaves have sometimes 5 leaflets 
on each side; and the petioles are so much 
winged as to appear like pinne. The tree is a 
native of the south of Europe, and the north of 
Africa. It grows to the height of 20ft., and is cultivated in gardens, as 
well as being found in a wild state. Desfontaines, who travelled in Bar- 
bary, states that the tree in that country, though punctured as it is in the 
Island of Scio, yet does not yield mastich; but that the wood gives out an 
aromatic smell when burned, and the berries yield an oil fit both for the lamp 
and for the table. The great source of the mastich of commerce is the Island 
of Scio, where it is obtained from the trees in the same manner as the 
Chian turpentine. The quantity produced there averages, according to Oli- 
vier, 125,000 lb. annually : but, according to Macculloch, the annual produce is 
1500 cwt. The tree was introduced into British gardens in 1654; but it is 
not very common there. It is not so hardy as P. Terebinthus, and should 
always be planted against a wall. 
¥ 4. P. atua’ntTIca Desf. The Mount Atlas Mastich, or Turpentine Tree. 
Identification. Desf. Atl., 2. p. 364.; Dec. Prod., 2. p. 64. ; Don’s Mill., 2. p. 66. 
Spec. Char., &§c. Leaves deciduous, impari-pinnate. The leaflets about 9, lanceolate, a little tapered 
at the base. The petiole between the terminal pairs of leaflets somewhat winged. (Dec. Prod., 
ii. p. 64.) A native of sandy places in Barbary and about Constantinople. 
Variety. *¢ P. a. 2 latifolia Dec. Prod., 2. p. 64., has leaflets rounded, broader at the base than those 
of the species. - It was found in the Isle of Scio by Olivier. 
Description, §c. The species is a deciduous tree, with a large roundish 
head, growing to the height of 40ft. in Barbary, near Coffa, not far from 
Mount Atlas; where, from being found in rows, it appears to have been in a 
state of cultivation. The variety with broad leaves is found in the Island of 
Scio, and also about Constantinople. The drupe of this tree is about the 
same size as that of the Pistacia Terebinthus ; but the tree seems to be rather 
more prolific of resin. Desfontaines, who discovered this species, and first 
described it, says that the resin oozes from the trunk and branches at differ- 
ent seasons of the year, but especially in summer; and that, in property, in 
smell, and in taste, it is scarcely to be distinguished from Oriental mastich. 
The Arabs collect it in autumn and winter, and chew it to improve their 
breath, and give brightness to their teeth; and the Moors eat the fruits, and 
bruise them to mix with their dates. This tree is rarely to be met with in 
British gardens. 

Genus Il. 
RHU’S L. Tue Ruus, or Sumacn. Lin. Syst. Pentandria Trigynia and 
Dice‘cia Pentandria. 
Identification. Lin. Gen., 369. ; Lam IIL, t. 207. ; Kunth Gen. Tereb., p. 5.; Dec. Prod., 2. p. 66. 
Don’s Mill., 2. p. 61. and p. 69. : { 
Derivation. From rhoos, or rhous, Greek, which is derived from rhudd, a synonyme of rud, Celtic, 
red ; in allusion to the colour of the fruit and leaves of some of the species in autumn. (Don’s 
Mill, ii. p. 69.) Donnegan has given the following explanation of the word rhous: —"* A species of 
