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Electronic Flora of South Australia
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Electronic Flora of South Australia genus Fact Sheet

Family: Rubiaceae
Canthium

Citation: Lam., Encycl. 1:602 (1785).

Derivation: A Latinisation of kanti, the Malabar name for C. parviflorum.

Synonymy: Plectronia L., Mant. 1:6 (1767), nom. rej.

Common name: None

Description:
Perennial woody shrubs rarely taller than 2 m; leaves opposite, usually petiolate, with stipules sheathing the terminal bud and scarcely fused to the petioles.

Inflorescence an axillary thyrse sometimes reduced to a single dichasium with few to many flowers; flowers usually bisexual, 4- or 5-merous; calyx with minute lobes, persistent; corolla tube cylindrical, shorter than the valvate lobes, deciduous; stamens with a tuft of hairs where the filaments are fused to the apex of the corolla tube; anthers with a terminal pointed appendage; ovary inferior, with 2 locules each with 1 ovule; style slender, with a terminal more or less conical stigma with vertical grooves but usually slightly split at the apex to become mitre-shaped, deciduous.

Fruits drupaceous, with 1 or 2 seeds developing.

Distribution:  A genus of about 200 species of the tropics of the Old World.

Biology: No text

Key to Species:
1. Leaf blade lanceolate, ovate to orbicular, 15-50 mm broad
 
2. Leaf blade with an acuminate apex, undulate margins, with tertiary veins scarcely visible
C. attenuatum 1.
2. Leaf blade with an obtuse to rounded apex, entire or scarcely undulate, with veins of 3rd and 4th order visible at least on the undersurface
C. latifolium 2.
1. Leaf blade linear, 3-5 mm broad
C. lineare 3.

Author: Not yet available


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