1330 ARBORETUM AND FRUTICETUM. PART iil. 
A. glatca Desf., Bot. Mag., t. 1115., Lodd, Cat., ed. 1836, is a native of Barbary; introduced in 
1785. Itis evergreen, like the preceding sort. 
A. altéssima Desf., A. caudita Desf., and A, trilobata Willd., are described in the Nouv. Du Hamel 
as growing in French gardens, with protection during winter. A, trilobata Bot. Reg., t. 1399., is a 
native of South America, where it grows to the height of 6ft. or 7 ft. There is a species of Aristo- 
ldchia, a native of China, against a wall in the Horticultural Society’s Garden, which is not yet 
named, It has stood there four years, and appears quite hardy. 
CHAP. XCIX. 
OF THE HARDY AND HALF+-HARDY LIGNEOUS PLANTS OF THE 
ORDER EUPHORBIA‘CER. 
Tue hardy species belonging to this order are included in 3 genera, namely 
Euphorbia L., Stillingia Garden, and Bixus Tourn. ; and these have the fol- 
lowing characters : — 
Evruo’rsid L. What seem flowers, and were formerly deemed flowers, 
are now regarded as each an inflorescence. This consists of an involucre, 
within which flowers of both sexes are associated, many male flowers around 
a solitary central female one. Involucre of one leaf, bell-shaped or top- 
shaped, with a limb in 8—10 segments, the outer coloured and resembling 
petals. — Male flower. This consists of a stamen, articulated upon a 
supporting column that is attended, (?) at its base, by, mostly minute, chaffy 
scales. — Female flower. Pistil solitary, central, upon a long pedicel, and 
becoming protruded. Ovary roundish, of 3 cells, each containing i ovule, 
affixed to the angle next the centre of the ovary. Styles 3, connate at 
the base, each ending in a bifid stigma. Fruit a regma. (Lindley’s Intr. 
to Bot.) Valves 3, with a partition from the centre of each, by which they 
form 3 cells. Seeds 1 in a cell; cells bursting elastically.—Sap, in all, milky, 
resinous; and, in most, acrid. Leaves, in most, alternate. Inflorescences 
disposed in umbels or panicles. (7. Nees ab Esenbeck, Gen. Pl. Fl. Germ.; 
Smith, Eng. Fl. ; and observation.) 
Sritu’nez4 Garden. Flowers unisexual. Males in a spike; females at the 
base of the same spike: (?) the two kinds, in S. /igdstrina, upon distinct 
plants. — Male. Seven flowers together, within an entire inyolucre ; .or, in 
S. Jigistrina, with the flowers not involucrated, but solitary in the axil of a 
bractea. Calyx like a corolla, of 1 piece, funnel-shaped, its margin jagged ; in 
S. igistrina the calyx is 3-cleft, and rather flat. Stamens 2-3; in S, /igtstrina, 
prominent, the filaments very slightly connected at the base. — Female. 
Involucre 1-flowered ; otherwise as in the male. Calyx superior, shaped as 
in the male. Ovary roundish. Style thread-shaped. Stigmas 3. Fruit a 
regma (Lindley’s Intr. to Bot.), surrounded at the base by the involucre a 
little enlarged, somewhat turbinate, bluntly triangular, 3-lobed, 3-celled, 
1-seed in each cell.—Sap milky. Leaves alternate, stipuled, entire. Spikes 
of flowers solitary or dichotomous, terminal or lateral. (Smith in Rees’s 
Cyclop.; and Nutt. in his Gen. Amer.) 
Bu’xus Tourn, Flowers in axillary groups; unisexual in effect, but the male 
flowers have a rudiment of a pistil; those of both sexes borne on one 
plant. — Male. Calyx of 4 minute leaves. Stamens 4, inserted under the 
rudiment of a pistil.— Female. Flowers singly, at the tip of groups of 
male ones. Calyx asinthe male. Ovary sessile, roundish, of 3 cells, and 2 
ovules in each cell. Styles 3. Stigmas 3, Fruit a regma, leathery, beaked 
with the styles; consisting of 3 incomplete cells that open down the centre 
and divide the style, and of 3 valves that bear the incomplete dissepiments in 
their centres. Seeds 2 ina cell, pendulous, both enclosed in the endocarpial 
lining of the cell; and this endocarpial lining, after the seed is ripe, disparts 
elastically, to admit of, and conduce to, their dispersion. (7. Nees ab Esen- 
beck’s Gen. Pl. Fl. Ger.)—Evergreen shrubs, or small trees, with rigid, 
