Flora of the Hawaiian Islands
Dicotyledon Literature for Pittosporum glabrum
Wagner et al., 1990, 1999.
   Pittosporaceae Bibliography
      Pittosporum glabrum

Common name(s): pittosporum, ha`awa, ho`awa, papahekili
General Information
DistributionIn the Hawaiian Islands, endemic to Kaua`i, O`ahu, Moloka`i, Lana`i, Maui.

Click here for detailed USGS map by Jonathan Price
Shrubs or small trees 4-8 m tall, young parts and inflorescences sparsely to moderately or occasionally densely pale brown tomentose; branches sparsely brown tomentose to glabrate.
Leaves chartaceous to subcoriaceous, narrowly oblanceolate to obovate or spatulate, sometimes ovate, (2.5-)4-23(-25) cm long, (1-)2-7(-10.5) cm wide, lateral veins 9-24 pairs, upper surface with veins ± slightly impressed, glabrate, occasionally with a few patches of tomentose pubescence persisting, lower surface with slightly raised veins, glabrate, sometimes young leaves pale brown tomentose, particularly in plants of exposed areas, rarely persisting as patches on mature leaves, margins entire, slightly to strongly revolute, apex acute or short-acuminate to obtuse or rounded, base attenuate, petioles (0.3-)0.5-3.2 cm long.
Flowers unisexual, 1-20 in axillary or sometimes terminal, simple, corymbose inflorescences, peduncles 4-85 mm long, pedicels (2-)7-20(-27) mm long, bracts subulate, 1.3-8 mm long; calyx broadly cup-shaped, sepals distinct, narrowly to broadly ovate, (1.2-)2.5-7 mm long, tomentulose to glabrate, margins ciliate, apex acute to obtuse or occasionally short-acuminate; petals white to cream or yellowish white, 8-21 mm long; filaments 3-11 mm long, those of pistillate flowers 1-6.5 mm long; fertile anthers 2-4.5 mm long, those of pistillate flowers 1-2.2 mm long; ovary 2(3)-carpellate.
Capsules ovoid to subcuboid or somewhat compressed and oblong-ovoid, 12-35 mm long, brown tomentose when young, glabrous to scattered brown tomentose at maturity, apex obtuse, rounded, or sometimes acute, the usually persistent style ca. 5-6 mm long, the valves with woody exocarp 1-5 mm thick, deeply rugose or sulcate to rugulose-roughened, sometimes with a median furrow or ridge, seed mass filling the capsule volume.
Seeds ca. 12-35, black to reddish black, subreniform and compressed to irregularly angled, 4-9 mm long.
2n = 24*