Flora of the Hawaiian Islands
Dicotyledon Literature for Kadua coriacea
Wagner et al., 1990, 1999.
   Rubiaceae -- The Coffee Family Bibliography
      Kadua coriacea
General Information
Distribution In the Hawaiian Islands, endemic to O`ahu, Maui, Hawai`i.

Rubiaceae - Kadua coriacea

Click here for detailed USGS map by Jonathan Price
Probably small erect shrubs; stems terete to slightly costate, glabrous or hispidulous on upper parts.
Leaves coriaceous, elliptic to oblong, rarely ovate or lanceolate, 3-8 cm long, (0.7-)1.5-3 cm wide, higher order venation on lower surface prominently reticulate, upper surface glabrous or rarely hispidulous, lower surface glabrous, hirtellous, or hispidulous, apex obtuse, base cuneate to rounded, petioles 0.5-1 cm long, base expanded and connate into a sheath, stipules deltate, up to 3 mm long, adnate to sheath, apex acuminate, mucronate.
Flowers perfect, few in terminal corymbose cymes, usually with a pair of smaller lateral cymes, bracts minute and scale-like; hypanthium turbinate, ca. 0.5 mm long; calyx lobes deltate, 0.5-0.7 mm long; corolla fleshy, salverform, glabrous or hirtellous, the tube 5-10 mm long, the limb quadrangular in bud, apex depressed, the lobes ca. 3 mm long, inflexed in bud, each with an inward pointing appendage ca. 0.5 mm long; stamens inserted in corolla throat, slightly exserted by the spreading corolla lobes; style enlarged toward base, the lower 1/3 densely woolly-pilose, the lobes flat.
Capsules cup-shaped to turbinate, 4-7 mm long, 3-4 mm in diameter, dehiscing loculicidally across disk, later somewhat further down capsule body, pyrenes tardily separating septicidally, endocarp heavily sclerified, disk conical.
Seeds dark brown, compressed, irregularly angled.