Flora of the Hawaiian Islands
Literature for Tibouchina urvilleana
Wagner et al., 1990, 1999. Literature for Tibouchina urvilleana var. urvilleana
Wagner et al., 1990, 1999.
   Melastomataceae -- The Melastoma Family Bibliography
      Tibouchina urvilleana
General Information
DistributionNative to southern Brazil (Rio Grande do Sul to Rio de Janeiro).
Habit
Shrubs or small trees 1-4 m tall; young branches quadrate, densely villous to hirtellous.
Leaves
Leaves elliptic-ovate to lanceolate, 4-12 cm long, 2-5 cm wide, 5-7-nerved, upper surface strigose, the hairs not adnate to surface, lower surface sericeous, margins entire, apex acute to acuminate, base obtuse to rounded, petioles 5-20 mm long.
Flowers
Inflorescences terminal, 8-15 cm long (incl. peduncle), with 2 bracts subtending each simple cyme, bracts elliptic to elliptic-ovate, 2.5-3 cm long, 0.8-1.4 cm wide, deciduous, bracteoles enclosing and concealing floral buds; hypanthium densely strigose; calyx lobes linear-subulate, 12-15 mm long, 3-5 mm wide, deciduous after anthesis; petals 5, purple, 25-40 mm long, 20-40 mm wide; stamens dimorphic; larger anthers 15-16 mm long, connective prolonged 6-7 mm, with an appendage ca. 1 mm long, smaller anthers 11-14 mm long, with shorter connective and appendage but otherwise as in larger anthers; filaments glandular puberulent at base. Fruiting hypanthium 14-15 mm long, 9-10 mm wide.
Fruit

Seeds
Mature seeds not seen.
Chromosomes
2n = 56