ENCYCLOPEDIA OF GARDENING. 
CULTURE: Soil, loamy. Position, sheltered, well-drained borders 
in S. of England. Plant in Oct. Propagate by cuttings of firm shoots 
6 in. long, inserted in well-drained pots of sandy soil in cold frame in 
Aug. or Sept. 
SPEOIES GULTIVATED: C. cruciata, white, autumn, 4 to 10 ft., Uruguay. 
Collinsia (Collins’s-Aower)—Ord. Scrophulariacez. Hardy an- 
nuals. First introduced, 1826. ; 
CULTURE: Soil, ordinary. Position, open beds or borders. Pro- 
pagate by seeds sown }in. deep outdoors in Sept., March, or April 
nee ag are required to flower. Thin seedlings to 6in. apart when 
2in. high. 
SPROIES CULTIVATED: O. bartsiefolia, purple, June, 1 ft., California; 
bicolor, purple and white, summer, 1 ft., California; bicolor alba, white; grandi- 
flora, lilac, June, 18 in., N.W. America; verna, white and blue, May, 1 ft., 
N. America, 
Collomia.—Ord. Polemoniacee. Hardy annuals. First intro- 
duced 1826. 
CULTURE: Soil, ordinary. Position, open beds or borders. Propa- 
gate by seeds sown } in, deep outdoors in Sept., March or April where 
ae are required to flower. Thin seedlings to 3 in. apart when 2 in. 
igh. 
SPECIES CULTIVATED: C. coccinea, red, June, 18 in., Ohili; grandiflora, red 
and yellow, summer, 18 in., California. 
Colocasia (West Indian Kale; Taro Root).—Ord. Aroidess. Stove 
herbaceous plants with perennial tuberous roots. Orn. foliage. First 
introduced 1551. Leaves, shield-like, heart or egg-shaped, deep green. 
CULTURE: Compost, equal parts turfy loam, peat, leaf-mould, & 
silver sand. Position, well-drained pots in shady plant stove. Pot 
moderately firm in pots just large enough to take tubers in Feb. or 
March; transfer to larger pots in April or May. Water moderately 
Feb, to eal & Sept. to Nov., freely April to Sept.; keep quite dry 
Nov. to Feb. Temp., Feb. to Sept. 70 to 80°; Sept. to Nov. 65° to 75°; 
oe A Feb. 65° to 65°. Propagate by dividing the tubers in Feb. or 
arch. 
SPECIES CULTIVATED: C. Antiquorum esculentum, 2 to 4 ft., Tropics. 
Colt’s-foot.—See Tussilago. 
Columbine (Aquilegia vulgaris) —See Aquilegia. 
Columnea.—Ord. Gesneriacew. Stove evergreen trailing shrubs. 
First introduced 1759. 
CULTURE: Compost, equal parts fibrous peat, sphagnum moss & 
charcoal. Position, hanging baskets. Plant, Marck. Water freely 
in summer, moderately in winter. Temp., Sept. to March 60° to 70°; 
March to Sept. 70° to 80°. Propagate by cuttings of firm shoots 3 in. 
Jong, inserted in pots of above compost mixed with sand, in temp. 
85°, Feb. 
SPECIES CULTIVATED: O. aurantiaca, orange, June, New Grenada. 
Colutea (Bladder Senna)—Ord. Leguminosw. Hardy deciduous 
flowering shrubs. First introduced 1568. 
CULTURE: Soil, ge oa Position, open or shady shrubberies, 
banks, etc. Plant, Oct. to Feb. Prune, Nov., simply cutting away 
weak shoots & shortening straggling ones. Propagate by seeds sown 
lin. deep outdoors in Oct. or March; cuttings of fom shoots inserted 
in sandy soil outdoors in Oct, 
SPECIES CULTIVATED: O. arborescens, yello Aug. i 
cruenta, red and yellow, July, 6 ft., Orient. situate Abus les 
Combretum (Caffre Butter-shrub)—Ord. Combretaces. Stove 
evergreen climbers. First introduced 1820. 
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