HNCYCLOPHDIA OF GARDENING. 
SPECIES CULTIVATED: T. elephantipes, yellow, summer, 5 to 10 ft., 8. Africa. 
Tetragonia (New Zealand Spinach)—Ord. Ficoidew. Hardy 
annual. Cultivated in gardens as a substitute for summer spinach— 
especially on light dry soils. First introduced 1772. Leaves, large, 
thick, succulent. 
CULTURE: Soil, ordinary. Position, sunny. Sow seeds, previously 
soaked for 24 hours in tepid water, singly lin. deep in 2-in. puts filled 
with light soil in March. Place pots in temp. 55° to 65° & keep soil 
moist. Transfer seedlings to 5-in. pots when seedlings form four 
leaves, harden off in cold frame, & plant out 3ft. apart in rows 4 ft. 
asunder. Gather the leaves only for cooking. Water freely in dry 
weather. Seeds may be sown in open ground in May it unable to 
sow them in heat. 
SPECIES CULTIVATED: T. expansa, yellow, summer, 3 in., New Zealand. 
Tetramicra. — Ord. Orchidacew, Stove epiphytal orchids. 
First introduced 1831. 
CULTURE: Compost, equal parts fibrous peat, sphagnum moss, & 
charcoal. Position, light, fastened by copper wire to small blocks of 
teak, & roots covered with sphagnum moss; or in small well-drained 
pots or teak baskets. Place on blocks, or in pots or baskets in March. 
'Temp., Nov. to Feb. 45° to 55°; March to May 50° to 60°; May to 
Nov. 55° to 65°. Water once a week, Nov. to Feb.; twice Feb. to 
April; daily April to Nov. Propagate by division of plants in March. 
SPECIES CULTIVATED: L. bicolor (Syn. Leptotes bicolor), white and purple, 
winter, 2 in., Brazil; rigida, rosy purple, spring, 1 ft., W. Indies. 
Tetratheca.—0Ord. ‘Tremandracee. Greenhouse evergreen 
flowering shrubs. First introduced 1803. 
CULTURE: Compost, two parts fibrous peat, one part turfy loam, 
one part equal proportions charcoal, broken pots, & silver sand. Posi- 
tion, well-drained pots in light airy greenhouse. Pot, Feb. or March. 
Water moderately at all seasons; rain water only to be used. Shade 
from sun, June to Sept. Temp., Oct. to April, 40° to 50°; April to 
Oct. 50° to 65°. Propagate by cuttings of side shoots inserted in 
sand under bell-glass in shade in temp. 55° to 65°, summer. 
SPECIES CULTIVATED: T. ericefolia, rose, summer, 1 ft.; glandulosa, purple, 
summer, 1 ft.; hirsuta, pink, spring, 2 ft.; juncea, purple, summer, 2 ft. All 
natives of Australia. 
Teucrium (Germander; Cat Thyme).—Ord. Labiate. Hardy 
herbaceous perennials. : 
CULTURE: Soil, ordinary. Position, sunny borders; sunny dryish 
rockeries or old walls for ‘I’. marum, etc. Plant, March or April. 
Propagate by division of roots in March or April. 
SPECIES CULTIVATED: T. marum (Cat Thyme), purple, summer, 1 ft., S. 
Europe; Scorodonia variegatum, variegated foliage, 1 ft., Britain. 
Thalia.—Ord. Scitaminee. Hardy and half-hardy perentitals. 
First introduced 1791. 
CULTURE OF HARDY SPECIES: Soil, sandy loam. Position, tub 
or shallow pond of water. Plant in March, Requires a warm, shel- 
tered spot. In N. of England best grown in greenhouse. 
CULTURE OF HALF-HARDY SPECIES: Soil, light, rich loam. 
Position, pots in moist shady part of greenhouse. Pot in March. 
Water freely in spring and summer. Temp., Oct. to March, 45° to 
55°; March to Sept., 55° to 65°. Propagate by division in spring. 
HARDY SPECIES: T. dealbata, blue, July, 6 ft., S. California. 
HALF-HARDY SPECIES: T. geniculata, blue, summer, 2 ft., W. Indies. 
Thalictrum (Meadow Rue; Tufted Columbine).—Ord. Ranur- 
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