CHAP. XXX. XANTHOXYLA'CEZ. PTE‘LEA. 489 
¥ 3. X. mr'rE Willd. The smooth, or thornless, Xanthoxylum, or Toothache 
Tree.. 
Identification. Willd. Enum., 1013. ; Dec. Prod., 1. p. 727.; Don’s Mill., 1. p. 802. 
Spec. Char., &c. Thornless. Leaves impari-pinnate, downy beneath. Flowers axillary. (Dec. Prod., 
i. p. 727.) Introduced from North America in 1812, and said to be a tree growing to the same 
height as X. /raxineum, with flowers of the same colour, and produced in thesame months. It 
may, possibly, be only a variety of the X. fraxineum, as Gleditschia inérmis is only a variety of G. 
triacanthos, 
App. i. Half-hardy Species. 
The species of this genus are not very ornamental, otherwise, there are some others, which are 
natives of China and Japan, which might be tried against a conservative wall: see the enumeration 
of all the species that have been introduced into Britain, in our Hortus Britannicus. 
Genus IL. 
"7g 
PTELEA LZ. Tue Pre ea, or SHrusBy Treroit. Lin. Syst. Mone'cia 
Tetra-Pentandria. 
Identification. Lin. Gen., No. 152. ; Dec. Prod., 2. p.82. ; Don’s Mill, 1. p. 806. 
Synonymes. Belliucia Adans.; Orme de Samarie, Fr. ; Lederblume, Ger. 
¥ 1. P. rrtrouia'ta L. The three-/eaffeted-leaved Ptelea, or Shrubby Trefoil. 
Identification. Lin. Sp., 173. ; Willd. Sp. Pl., 1. 670.; Dec. Prod., 2. p. 82. ; Don’s Mill., 1. p. 806. 
Synonymes, Orme de Samarie A trois Feuilles, Fr.,; Pes aps Lederblume, Ger. ! 
ngravings, Dill. Elth., t.122.; Mill. Ic., t. 211.; N. Du Ham., t. 57.; Hayne Abbild., t. 74. ; 
hmidt Arb., 2. t. 76. ; and the plate in our Second Volume. 
Spec. Char., §c. Leaf of three leaflets that are ovate acute, the middle one 
much tapered towards its base: Flowers in corymbs, usually tetrandrous. 
(Dec. Prod., ii. p, 82.) A shrub or low tree from North America, where 
it is found from New York to Carolina in shady moist hedges, and on the 
edges of woods among rocks. It was introduced in 1704, and produces its 
small greenish white flowers in corymbose clusters in June and July. These 
are succeeded by flattened winged capsules, somewhat resembling those of 
the elm; whence the French name of orme. 
Varieties. 
P. t. 2 pentaphGlla Munchh. Hans., 3. p. 342., has 5 leaflets; but we have not seen a plant. 
P. t. 3 pubéscens Pursh has pubescent leaves, and is a native of Pennsylvania ; but we are not 
aware of its being in cultivation in Britain. 
Description, §c. When this plant is pruned up with a single stem, it forms 
a handsome low tree with a hemispherical head ; but in British gardens it is 
more frequently found as a large shrub, with numerous stems proceeding from 
the same basal point. The species was originally sent to England by Banister, 
and plants of it were raised by Bishop Compton at Fulham; but they were 
lost, and the plant was reintroduced from Carolina by Catesby in 1724. 
Being hardy, and of easy culture in any common soil, the tree is not uncom- 
mon in collections ; and it well deserves a place there, both on account of 
the beauty of the leaves, and of the fruits, and the handsome general form of 
the tree. It is easily propagated by cuttings (put in in the autumn, and 
covered with a hand-glass), or by seeds. 
Statistics. _ At Purser’s Cross, there is a tree 25 ft. high, with a trunk 14 in. in diameter; at Glou- 
cester Lodge, P*pepton, is a somewhat deformed s imen, 16 ft. high, with a trunk 8 in. in diameter 
at the ground; in Sloane Square is one upwards of 12 ft. high ; inthe Fulham Nursery, one 12 years 
lanted, and tafe. high ; in the Hammersmith Nursery, one 5 years planted, 10 ft. high; in Mid. 
lesex, near Shepperton, by the road side, a very handsome tree, about 25 ft. high, with the head 
SO ft. in diameter; in Su » at Claremont, 15 ft. high ; in Wiltshire, at Longleat, one 50 years 
planted, and 18 ft. high, the diameter of the trunk 14in., and of the head 24 ft, 3 1n Worcestershire, 
at Croome, 10 years planted, and 15 ft. high. In Scotland, in the ar nag ciee, > Botanic Garden, 15 years 
planted, and 12 ft. high; in Bamflshire, at Gordon Castle, 45 ft. high, the diameter of the trunk 15in., 
and of the head 97 ft., in a loamy soil, and a sheltered situation. In Ireland, at Terenure, near 
Dublin, 15 years planted, and 8 ft. high. In France, at Paris, in the Jardin des Plantes, 60 years 
planted, and 37 ft. high, the diameter of the head 40 ft; at Scéaux, 10 years planted, and 20 ft. high ; 
in the Botanic Garden at Toulon, 10 years planted, and 10 ft. high ; at Nerriéres, near Nantes, 15 ft. 
