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
















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Habit
Glabrous, scandent shrubs; stems sometimes rooting where in contact with ground, up to 5 m long, few-branched, arcuate.
Leaves
Leaves green on upper surface, lower surface pale green and irregularly marked with purple or brownish purple areas, coriaceous, oblong-elliptic to elliptic or narrowly elliptic, slightly asymmetrical, 13-22 cm long, 3-7.5 cm wide, lateral veins strongly ascending, only slightly arcuate, higher order venation obscure, evident veins few, glabrous, apex long-acuminate or sometimes attenuate, base cuneate or sometimes attenuate, petioles 1.8-5.5 cm long, upper surface ragged, appearing grooved as a result of the stipular scars, stipules membranous, completely adnate to petioles to form a cup 25-40 mm high that collects water and debris, quickly becoming ripped along petiole margins as stem and leaves elongate, caducous by second or third node, apex abruptly acuminate, prolonged into a thinly fleshy mucro 7-9 mm long.
Flowers
Flowers heterostylous, apparently perfect or functionally pistillate, in dense, axillary thyrsoid inflorescences, peduncles 1-12 mm long, pedicels 1-2 mm long, bracts connate, ovate, 6-10 mm long; hypanthium turbinate, 1.5-2 mm long; calyx lobes ovate, 2-3 mm long, margins fimbriolate; corolla yellowish green, the tube tinged reddish purple, fleshy, funnelform, slightly dimorphic, those of short-styled flowers bulging at the throat due to underlying anthers, those of long-styled flowers scarcely bulging, the tube 6.5-9 mm long, the limb abruptly expanded from tube in bud, strongly quadrangular, the lobes broadly ovate, 2.5-3 mm long, apex with a minute appendage; anthers fertile in short-styled flowers, sterile in long-styled flowers; style glabrous, 2-lobed, the lobes firmly appressed together in short-styled flowers, exserted and spreading in long-styled flowers.
Fruit
Fruit drupaceous, subglobose, 4-5 mm in diameter when dry, indehiscent.
Seeds
Seeds dark brown, irregularly shaped, minutely papillose.