ENCYCLOPEDIA OF GARDENING. 
Our Lady’s Thistle (Silybum Marianum).—See Silybum. 
Ouvirandra (Lattice or Lace-leaf Plant’. — Ord. Naiadacee. 
Stove aquatic perennials. Orn. foliage. First introduced 1855. 
Leaves, broad, oblong, lace-like. on 
CULTURI3: Compost equal parts loam and leaf-mould. Position, 
in small pot immersed in tub or tank of water 12 to 18in. deep. Pot, 
Feb. or March. Temp. of water, 65° to 75°. Change water occa- 
sionally. Temp., March to Sept. 65° to 75°; Sept. to March 55° to 65°. 
Propagate by seed sown fin. deep in above compost in small pot 
immersed in water heated to temp. 75°, any time; division of roois, 
Feb. to March. 
SPECIES CULTIVATED: O. fenestralis, white, Aug., Madagascar. 
Oxalis (Wood Sorrel; French Sorrel).—Ord. Geraniacex. Green- 
eae & hardy annuals, herbaceous perennials, and bulbous reoted 
ants. 
CULTURE OF GREENHOUSE SPECIES: Compost, as above. Posi- 
tion, well-drained pots in sunny greenhouse or window. Pot autumn- 
flowering kinds in Aug., winter-flowering kinds in Sept. or Oct., spring- 
flowering kinds, Jan, or Feb., & summer-flowering kinds, March or 
April. Put bulbs 4 in. deep and }in. apart in 5in. pots. After potting, 
lace in warm part of greenhouse or window. Water moderately till 
eaves appear, then freely. Apply stimulants occasionally when flowers 
form. Gradually withhold water when flowers fade, & keep quite dry 
& cool till growth begins. Repot annually. 
CULTURE OF HARDY SPECIES: Soil, sandy loam. Position, 
edgings to sunny borders or on rockeries. Plant bulbous species, Aug. 
to Nov., placing bulbs 2 in. below surface, & 6 to 12 in. apart; herba- 
ceous perennials in March or April. Lift bulbs of choice species in 
Sept. or Oct. Store in sand in cool, frost-proof place till March, then 
lant out. Propagate by seeds sown 1-16 in. deep in light sandy soil 
in temp. 55° to 65° in spring; division of roots or offsets at potting or 
planting time. 
GREENHOUSE SPECIES: O. carnosa, yellow, autumn, 6 in., Chili; cernua 
(Bermuda Butter-cup), yellow, spring, 6 in., S. Africa; cernua flore-pleno, double; 
Deppei, red, March, 4 to 6 in., S. America; floribunda, rose, March, 1 ft., Brazil; 
hirta, red, summer, 8 in., 8. Africa; pentaphylla, lilac and yellow, summer, 6 in., 
S. Africa; rosea, rose, spring, 6 to 8 in., Chili; tetraphylla, red, summer, 6 in., 
Mexico; variabilis, red, white, or crimson, autumn, 3 in., 8. Africa. The following 
are bulbous-rooted: cernua, floribunda, Deppei, and tetraphylla. 
HARDY SPECIES: O. Acetosella (Wood Sorrel), white, spring, 2 to 3 in., 
Britain; corniculata rubra, yellow, summer, 6 in., leaves purple, Britain; elegans, 
purple, summer, 6 in., Peru; enneaphylla, rose, white, June, 4 in., Falkland Isles; 
purpurata (Syn. doweana), purple, Oct., 3 in., S. Africa. 
Oxeye.—See Bupthalmum and Adonis. 
Ox-eye Chamomile (Anthemis tinctoria).—See Anthemis. 
Oxeye Daisy (Chrysanthemum leucanthemum).—See Chrysan- 
themum. 
Oxlip (Primula elatior).—See Primula. 
Oxycocus (Common Cranberry; American Cranberry).—Ord. 
Vacciniaces. Hardy evergreen trailing shrubs, Edible fruiting. Ber- 
ries, globular, deep red; ripe summer. 
CULTURE: Soil, peat or bog. Position, open moist beds near ponds 
or streamlets. Excavate soil to depth of 6 in. below surrounding sur- 
face, & place 9 in, of peat or bog soil & loose stones in, and allow water 
to percolate to within 3in. of surface. Plant, Sept. or March, 2 ft. 
apart each way. 
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