ENCYCLOPEDIA OF GARDENING. 
BIENNIAL SPECIES: S. compacta, pink, summer, 18 in., Asia Minor. 
PERENNIAL SPECIES: S. acaulis (Cushion Pink; Moss Pink), pink, June, 2 in., 
N. Temperate Zone; acaulis alba, white; acaulis grandiflora, crimson; alpestris 
(Alpine Catchfly), white, May, 6 in., Alps; S. Blisabethe, rose, summer, 6 to 9 in., 
Tyrol; maritima flore pleno (Witch’s Thimble); white, double, summer, trailing, 
Europe; pennsylvanica (American Wild Pink), pink, spring, 6 to 8 in., U. States; 
rupestris, white, May, 4 to 6 in.,; Schafta, purple, summer, 4 to 6 in., Caucasus; 
virginica (Fire Pink), crimson, June, 12 to 18 in., N. America. 
Silk-bark Oak (Grevillea robusta).—See Grevillea. 
Silk-vine (Periploca greca).—See Periploca. 
Silk-weed (Asclepias tuberosa).—See Asclepias 
Silphium (Compass Plant; Cup Plant).—Ord. Composite. Hardy 
perennial herbs. 
CULTURE: Soil, ordinary. Position, sunny borders. Plant, Oct. 
to April. Lift, divide, & replant every two or three years. Propagate 
by division of roots, Oct. to April. 
SPECIES CULTIVATED: 8, laciniatum (Compass Plant), yellow, July, 4 to 6 ft., 
N. America; perfoliatum (Cup Plant), yellow, July, 6 to 8 ft., N. America, 
Silver Bell Tree (Halesia tetraptera).—_See Halesia. 
Silver-edged Primrose (Primula margitiata).—_Sce Primula. 
Silver Fir (Abies pectinata).—See Abies. 
Silver Grass (Phalaris arundinacea variegata).—See Phalaris. 
Silver-leaved Beech (Fagus sylvatica argentea-variegatis). 
—See Fagus. 
en Maiden-hair Fern (Nothochlena nivea)—See Notho- 
chlena. 
Silver Maple (Acer dasycarpum).—See Acer. 
Silver Rod (Asphodelus ramosus).—See Asphodelus. 
Silver Thatch-palm (Thrinax argentea).—See Thrinax. 
Silver-tree (Elzagnus argentea).—See Eleagnus. 
Silver-variegated Yew (Taxus baccata argentea).—See 
Taxus. 
Silver Vine ees argentea).—See Pothos. 
Silver Wattle (Acacia dealbata’.—See Acacia. 
Silvery Cedar oo altantica).—See Cedrus. 
Silvery Clary (Salvia argentea).—See Salvia. — . 
Silvery-leaved Cineraria (Senecio Cineraria).—See Senecio. 
Silvery-leaved Oleaster (Elezagnus argentea).—See Eleag- 
nus. 
Silvery-leaved Sage (Salvia argentea).—See Salvia. 
Silvery-leaved Salt-tree (Halimodendron argenteum),— 
See Halimodendron. : ; j 
Silvery Reed (Cortadeira conspicua)—See Cortadeira. 
Silvery Tree Fern (Cyathea dealbata).—See Cyathea. 
Silybum (Malic Thistle).—Ord. Composite. Hardy perennial herb. 
Orn. foliage. Leaves, large, variegated with broad white veins. 
CULTURE: Soil, ordinary. Position, open borders. Propagate by 
seeds sown 4 in. deep in March where plants are to grow. 
SPECIES CULTIVATED: S. Marianum (Blessed, Holy or Milk Thistle), 3 to 5 ft., 
“Simpson's Hardy Hedgehog Cactus (Echinocactus 
Simpsoni).—See Echinocactus. ; 
Sinningia (Gloxinia).—Ord. Gesneriacee. Stove tuberous-rooted 
flowering plants. Deciduous. First introduced in 1739. Plants 
better known under the name of Gloxinia. 
CULTURE: Compost, equal parts fibrous peat, fibrous loam, leaf- 
mould, well-decayed manure, & a little silver sand. Position, well- 
40 
