Flora of the Hawaiian Islands
Literature for Psychotria hathewayi
Wagner et al., 1990, 1999. Literature for Psychotria hathewayi var. brevipetiolata
Wagner et al., 1990, 1999. Literature for Psychotria hathewayi var. hathewayi
Wagner et al., 1990, 1999.
   Rubiaceae -- The Coffee Family Bibliography
      Psychotria hathewayi
General Information
Small trees up to 8 m tall; young branches yellowish to grayish brown.
Leaves chartaceous, obovate, oblanceolate, elliptic-oblong, or occasionally suborbicular, 2-12.6 cm long, 1.1-7.3 cm wide, lateral veins 5-11 pairs, tertiary veins often forming a conspicuous network, glabrous or occasionally puberulent or hirtellous, particularly along veins, domatia usually absent, apex obtuse to rounded, base acute to truncate or rounded, petioles 0-1.2 cm long, stipules obovate or deltate-obovate, up to 6 mm long.
Flowers unisexual, 4-5-merous, inflorescences with verticillate branching, branches up to 18 mm long, always shorter on the upper node, each branch usually terminated by a 3-flowered cymule, peduncles 0-5 cm long, lateral flowers of each cymule with small pedicels and the central one sessile; calyx 3-3.5 mm long, hirsute, often densely so, with long, white hairs, truncate at apex or with acute lobes; corolla tube 2-3 mm long at anthesis, somewhat expanded toward apex, throat glabrous, the lobes usually thick and fleshy, spreading, ovate, 3-5 mm long, often hirsute at apex and along dorsal or outer surface; filaments of staminate flowers 1-2 mm long; anthers attached at the base, elliptic-oblong or ovate-oblong, 0.7-1 mm long; ovary 2-2.5 mm long at anthesis; style 2-3 mm long; stigmas divaricate, 0.7-1.1 mm long, often hirsute or pubescent.
Fruit ellipsoid-pyriform, 12-18 mm long, with persistent calyx, sometimes with the persistent and expanded disk protruding, pyrenes hemispherical in cross section, with a T-shaped invagination of the seed coat on the ventral side.