ENOYCLOPHADIA OF GARDENING. 
SPECIES OULTIVATED: O. dictamnus (Dittany of Crete), pink, summer, 1 ft., 
Crete; Marjoran (Sweet Marjoram), purple or white, summer, 2 ft., N. Africa; 
Onites (Pot Marjoram), white, summer, 1 ft., 8, Europe. Se 
Ornithogalum (Star of Bethlehem; Onion Plant).—Ord. Lilia- 
cee. Hardy and greenhouse bulbous plants. om. 
OUTDOOR CULTURE.—Soil, rich ordinary, sandy. Position, sunny 
borders, rockeries or turf. Plant, Aug. to Nov., placing small bulbs 
3 in., & large bulbs 4 to 6 in, below surface, & 2 tc 3in. apart. Mulch 
annually in March with decayed manure. Apply weak stimulants 
occasionally in summer. 
INDOOR CULTURE: Compost, two parts sandy loam, one part equal 
[ee Deed leaf-mould, pe & sand. Position, pots in sunny green- 
ouse or window. Pot, Sept. to Feb., placing several small or one large 
bulb in a 5 or Gin. pot. Good drainage essential. Water moderately 
when growth begins, freely when in full growth, gradually withholding 
when foliage turns yellow, & keeping dry till new growth begins. Apply 
stimulants occasionally whilst in full growth. Repot annually. 
Temp., March to Sept. 55° to 65°; Sept. to March 40° to 50°. 
CULTURE OF ONION PLANT: Compost, two parts sandy loam, one 
part leaf-mould & well-decayed manure & little sand. Position, sunny 
window or outdoors June to Sept. Pot, Feb. or March. Good drainage 
& firm potting essential. Water moderately Feb, to May, freely May 
to Sept., moderately Sept. to Nov., keep quite dry Nov. to Feb. Apply 
stimulants once a week May to Sept. Propagate by offsets removed 
from old bulbs & repotted, Sept. to Feb. 
GREENHOUSE SPEOIES: 0. ‘arabicum, white, fragrant, summer, 2 ft., 8. 
Europe; biflorum, white, April, 1 ft., Chili and Peru; longibracteatum (Onion 
Plant), white, May, 1 to 2 ft., 8. Africa; and its variety variegatum. 
HARDY SPECIES: O. nutans, white, spring, 1 ft., Europe (Britain); nutans, 
boucheanum, a superior form; pyrenaicum, yellow and green, June, 2 ft., 8. 
Europe; umbellatum (Star of Bethlehem), white, May, 1 ft., Europe, and its 
varieties Leichtlinii and splendens. 
Orobus.—See Vicia. 
Orontium (Golden Club).—Ord. Aroidew. Hardy aquatic peren- 
nial. First introduced 1775. 
CULTURE: Soil, boggy. Position, margins of shallow ponds or 
rivulets. Plant, Oct. tc March, placing roots 6 to 12in. below surface 
of water. Propagate by division of root stock in Oct. or March. 
SPECIES OULTIVATED: O. aquaticum, green, May, 6 in., N. America, 
Orris-root (Iris florentina).—See Iris. 
Osage Orange (Maclura aurantiaca).—See Maclura. 
Osier.—See Salix. 
Osier Willow (Salix viminalis).—See Salix. 
Osmanthus (Fragrant Olive; Holly-leaved Olive).—Hardy ever- 
green flowering shrubs. First introduced 1771. 
CULTURE: Soil, loamy. Position, sheltered sunny borders, or 
on 8. W. walls. Plant, Sept., Oct. or April. Prune when neces- 
sary, April. ; 
POT CULTURE: Compost, two parts sandy loam, one part. leaf- 
mould, & sand. Position, cold sunny greenhouse, Sept. to June; out- 
doors, June to Sept. Pot, Sept. or Oct. Water free y April to Oct., 
moderately other times. Temp., Sept. to May 40° to 50°. Propagate 
by seeds sown 1-16 in. deep in sandy peat in’ cold frame in ring or 
autumn; by cuttings of firm young shoots inserted in sandy soil under 
hand-light outdoors, or in frame in summer. 
SPECIES CULTIVATED: 0. Aquifolium, white, Aug., 4 ft., 
302 
Japan; and its 
