AN ENCYCLOPADIA 
OF HORTICULTURE. | 523 
Orgyia antiqua, or Vapourer Moth—continued. 
The body is dark brown; the wings are rusty-brown, 
with markings of deeper and paler tints, and at the rear 
angle of each fore wing is a conspicuous white spot. 
Fic, 774. ORGYIA ANTIQUA (Male). 
The female has the wings reduced to tiny scale-like 
organs on each side of the heavy, clumsy body, which 
is covered with woolly, yellowish-grey pubescence. The 
Fic. 775. LARVA OF ORGYIA ANTIQUA. 
larva is shown of the natural size in Fig. 775. It is 
covered »with yellowish hairs. On the back of the 
fourth to seventh segments are long tufts of yellow 
or brown hairs; and on the back of the last segment, 
and on each side of the head, is a long black tuft of 
clubbed hairs. The larva may reach 2in. in length. 
When full fed, it spins, in crevices or among leaves, a 
slight greyish-brown cocoon of silk, largely mixed with its 
own hairs, and in this changes into a hairy pupa. The 
female emerges in autumn, and lays her eggs on her 
cocoon, where they pass the winter, the larve emerging 
in spring. 
Remedy. The best remedy is hand-picking the insects 
in all stages of development; the larve especially are 
conspicuous. 
ORIGANUM (the ancient Greek name, used by 
Hippocrates). Marjoram. Including Majorana. ORD. 
Labiate. A genus comprising about twenty-five species 
of mostly hardy sub-shrubs or herbaceous perennials, for 
the most part natives of the Mediterranean region, one 
being indigenous to the Canary Islands, and two or three 
broadly dispersed over Europe and extra-tropical Asia. 
Corolla tube included or exserted; limb bilabiate ; whorls 
two, rarely six to ten, flowered, crowded in globose, oblong 
Origanum— continued. . : 
or cylindrical spikelets, which are solitary or aggregate 
at the tips of the branches. Leaves small, entire or 
slightly toothed; floral ones all reduced to bracts. Few 
of the species have any ornamental value, but the 
undermentioned are worth growing. For cultivation of 
O. Majorana, see Marjoram. All the other species 
here mentioned are easily raised from seeds, or from 
cuttings of the young, growing, barren shoots; or by 
division of the roots. They like a rather dry, warm, 
well-drained border, and succeed in almost any soil. 
O. Dictamnus (Dittany). Dittany of Crete. Jl. pink, in droopin, 
heads. Summer. l. broad-ovate, obtuse, quite entire, rounde 
at the base, thick, clothed with dense wool on both surfaces. 
Branches ascending. h. lft. Crete, 1551. A very pretty, but 
rather tender little sub-shrub. (B. M. 298.) 
O. Majorana, Garden, Knotted, or Sweet Marjoram, fl. purplish 
or white; spikelets oblong, sessile, glomerate on the branchlets. 
June. J. petiolate, oblong-ovate, obtuse, quite entire, tomentose 
on both surfaces, Branches nearly glabrous, racemosely panicled. 
h. lft. to 2ft. North Africa, 1573. Syns. O. majoranoides and 
Majorana hortensis. See also Marjoram. 
O. majoranoides (Marjoram-like). A synonym of 0. Majorana. 
O. Maru (mastic), of Sims. A synonym of O. microphyllum. 
0. 8 (mall -leaved). „. pink; spikelets few, 
lobose, disposed in small, loose corymbs at the tips of the 
ranches, J. small, remote, petiolate, bri y ovate, 
obtuse, round at base. Branches purplish, smooth, filiform. 
h. 1ft. Crete, &c. Sub-shrub. (B. M. 2605, and S. F. G. 573, 
under name of O. Maru.) 5 
O. Onites (Onites). Pot Marjoram. fl. whitish; spikelets small, 
ovoid, numerous, densely corymbose. Summer. i 
une. 
J. sessil 
ovate, serrated a little, rather villous or tomentose. Stems nee 
nearly simple, hairy. h. 1ft. Mediterranean region, 1759. Sub- 
shrub. (S. F. G. 572.) ; i ; 2 
O. sipyleum (Mount Sipylos). fl. pink; spikelets „ soli. 
tar, oy taroan, drooping, Summer, on short pedi, 
entire; lower ones ro or ; upper ones 
ie. glaucous. Stem decumbent, paniculately 8 . 
h. lft. to 14ft. Levant, 1699. A very pretty procumbent 
shrub. (S. F. G. 570.) 
O. Tournefortii (Tournefort's). Dittany of Amorgos. fl. pink; 
spikes more dense than in O. Di nus, August. l. sessile, 
orbiculate, sub-cordate at base. h. lft. Amorgos, 1788. Sub- 
shrub. (A. B. R. 537; S. F. G. 569.) ; 
9 Common or Wild Marjoram. fl. pupie; 
spikelets oblong or cylindrical, glomerate, corymbosely panicled. 
ummer. l. petiolate, ovate, obtuse, serrated a little, rounded at 
the base. Stem erect, villous, herbaceous. k. lft. to 2ft. Europe, 
&c. (Britain). (B. M. P1. 204.) 
ORITHALIA. Included under Agalmyla. 
ORITHYIA. Included under Tulipa (which see). 
ORMOCARPUM (from ormos, a chain, and karpos, 
a fruit; referring to the narrow, chain-like pods). Sywns. 
Diphaca and Rathkea. ORD. Leguminose. A small genus 
(about half-a-dozen species) of tall, often glutinous, stove 
or greenhouse shrubs, of which one is broadly dispersed 
between the tropics in Asia and Africa, two or three are 
indigenous to tropical Africa, and two are Mexican. 
Flowers yellow, white, or purple-striped, in short, axillary 
racemes; standard orbicular, ungaiculate. Pods linear, 
compressed. Leaves sometimes impari-pinnate, with small 
exstipellate leaflets, sometimes one-foliolate, with a large, 
acute leaflet; stipules striped. The undermentioned, the 
only species in cultivation, is a greenhouse evergreen, of 
strong habit. Young specimens only are adapted to pot 
culture; the older ones should be placed out in the 
borders in summer. A compost of peat and loam is the 
best soil for this plant. Propagation may be effected, in 
April, by cuttings of half-ripened shoots, inserted in the 
compost above mentioned. : 
O. coronilloides (Coronilla-like). fl. pale yellow; peduncles 
many-flowered, axillary. May. I. impari-pinnate; leaflets 
ovate, glabrous, small, sub-sessile, opposite or alternate. Stem 
arboreous; branches spreading. Tropical Africa. 
ORMOSIA (from hormos, a necklace; referring to 
the seeds of O. coccinea, which are scarlet, with a dark 
spot, and are strung for necklaces). Necklace-tree. In- 
eluding Macrotropis. ORD. Leguminose. A genus 
comprising about eighteen species of stove, evergreen 
