504 
THE DICTIONARY OF GARDENING, 
Opuntia—continued, 
Fic. 756. OPUNTIA RAFINESQUII. 
o. Rafinesquii (Rafinesque’s).* jl., often with a red centre 
“larger, and with . petals 5 to twelve) than in 
O. vulgaris. June. l. spreading, some o 
See Fig. 
O. Salmiana (Prince Salm-Dyck’s).* „. yellow, red. September. 
Plant erect, branched, of a greyish-green colour; 1 
cylindrical, without tubercles ; areolæ somewhat crowded, white- 
tomentose, the mature ones pulvinately globose, 
the lower ones with three or four minute, reddish 
rickles, h. 2ft. Brazil, 1850. (B. M. 4542; L. & 
. F. G. i. 101.) 
O. Segethi (Segeth’s). This species is similar 
in habit to O. Peppigii, but has much longer 
flowers, the ovary being 34in. long, with a few 
thick, cylindric, spreading bracts, lin. long; 
corolla pale pink, Izin. in diameter. Chili, 1884. 
K. G. 1129.) 
O. stenopetala (narrow - petaled). fl. yellow, 
small; sepals and petals subulate, sub-erect. 
Plant prostrate; joints large; prickles one to three, 
deflexed. Mexico, &c., 1835. Syn. O. grandis. 
O. sulphurea (sulphur-coloured). fl. yellow. 
July. Stem articulated; joints erect, sub- 
glo „of a beautiful green colour; prickles 
pale-tomentose ; upper ones bristly, dark purple, 
very minute, penicillately collected; lower ones 
six to twelve, elongated, acicular, white, purple 
1 central ones very long. M. 2ft. Chili, 
O. Tuna (Tuna).* fl. reddish- orange. July. fr. 
rich carmine, 2in, to 3in. long. Branches jointed, 
Ain. to 8in. or more long, oval or oblong, with dis- 
tant bundles of yellow, unequal, spreading spines, 
Stem (of an old peen sometimes 20it. high. 
West Indies, &c., 1731. See Fig. 757. 
O. tunicata (coated-spined). Plant sub-erect, 
much-branched ; branches green, divergent, at- 
tenuated at base, tuberculate-areolar; areolæ 
obtuse, oblong, white-tomentose; prickles four 
to six large ones, and two or three small ones, 
all white, membranous, sub-pellucid, tunicated. 
Mexico, 1840. 
O. Turpinii (Turpin’s). Plant articulate, erect, 
low, with mammillariform tubercles, greyish - 
green; joints globose-ovate, crowded, young 
ones about 2in. in diameter; areole round, 
white - tomentose; prickles biformed, varying 
from three to ten lines long. Chili, 1844. 
O. vulgaris (common).* fl. pale sulphur-yellow, 
June. Jr. nearly smooth, pulpy, edible. 
minute, ovate-subulate and appressed; axils 
bristly, rarely with a few small spines. Plant 
low, prostrate or spreading, with flat and broadly 
obovate joints. A. 2ft. Mexico, &c., 1596, (B. M. 
2393, under name of Cactus Opuntia.) 
O. 
of O. Ficus- Indica. 
ORACH (Atriplex hortensis). A plant 
sometimes cultivated for the use of its 
leaves, principally as a substitute for 
Spinach, It will grow in almost any 
Orach—continued. 
ORANGE. Citrus Aurantiwm, and some of the 
other members of the Orange family, have been culti- 
vated for so long a period, and over such an extended 
geographical area, that it is scarcely possible to refer 
the numerous forms, which have originated under culture, 
to their respective and specific types. There can, how- 
ever, be no doubt that the two or three parent types, 
the axils bearing a few 
small spines and a single strong one, Lin. to 12in. long. Plant 
with ong guts joints. A. lft. North America, 1868. Hardy. 
ee 
(common), of Tenore. A synonym 
Fic. 757, OPUNTIA TUNA. 
soil, but produces the largest leaves 
in that which is rich. Sow seed 
in drills, 2ft. apart, in March, 
and again, successionally, if much 
in demand, as the plants soon 
run to seed. If seed is required, 
it should be collected before 
becoming quite ripe; otherwise, 
the wind will carry it away. The 
flowers should be pinched off if 
seeds are not to be kept. There 
are about three varieties, dis- 
tinguished by their colours, t.e., 
white or pale green, red, and purple. 
The plant commonly called Red 
Mountain Spinach (A. hortensis ru- 
bra) has fine, ornamental foliage, 
grows to a height of 3ft. or 4ft., 
and is very useful in sub-tropical 
gardening. It is a hardy annual; 
consequently, a new stock must be 
raised each year, ; 
