Flora of the Hawaiian Islands
Dicotyledon Literature for Psychotria mauiensis
Wagner et al., 1990, 1999.
   Rubiaceae -- The Coffee Family Bibliography
      Psychotria mauiensis

Common name(s): kopiko, `opiko
General Information
DistributionIn the Hawaiian Islands, endemic to Kaua`i, Moloka`i, Lana`i, Maui, Hawai`i.

Click here for detailed USGS map by Jonathan Price
Plants extremely variable in habit, from shrubs up to 4 m tall to trees up to 12 m tall; branches grayish brown, chestnut brown, or yellowish brown.
Leaves membranous to coriaceous, broadly obovate to oblanceolate, elliptic, or suborbicular, 1.8-13 cm long, 1-9.3 cm wide, lateral veins 4-10 pairs, glabrous or pubescent, domatia absent or inconspicuous, margins revolute or sometimes flat, apex obtuse or rounded, base acute, rounded, or subtruncate, sometimes sessile, but usually with petioles 0.5-2 cm long, stipules deltate-ovate to broadly obovate, up to 6(-15) mm long.
Flowers functionally unisexual, 4-5-merous, inflorescences with 1 main axis and 1-2 nodes of verticillate branching, the branches often again divaricately or verticillately branched, peduncles and branches glabrous or pubescent, the ultimate branches terminated by a 3-flowered cymule, peduncles 1-7.4 cm long, lateral flowers of each cymule often on small pedicels, branches subtended by small bracts; calyx 2-2.8 mm long, glabrous or sometimes pubescent or hirtellous, truncate or with short obtuse lobes; corolla tube 1-2 mm long, somewhat expanded toward apex, throat glabrous, the lobes often thick, broadly ovate to lanceolate, 1.2-2.9 mm long, glabrous or occasionally pubescent on lower surface and at apex; filaments of staminate flowers up to 1 mm long at anthesis; anthers attached at base, ovate-oblong, 0.7-0.9 mm long; ovary 1.5-2.5 mm long at anthesis; style 0.5-2.5 mm long, glabrous or pubescent; stigmas divaricate, 0.6-2 mm long, glabrous or pubescent.
Fruit oblong-pyriform, 9-15 mm long, ± with disk protruding somewhat from the short persistent calyx, pyrenes hemispherical in cross section, with T-shaped invaginations of the seed coat on the ventral surface.
This species is extrememly variable in features such as leaf shape and size, pubescence, and size of the floral parts.