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

Common name(s): pittosporum, `a`awa, `a`awa hua kukui, ha`awa, ho`awa
General Information
DistributionIn the Hawaiian Islands, endemic to Hawai`i.

Click here for detailed USGS map by Jonathan Price
Small trees 3-8 m tall, young parts and inflorescences densely pale brown tomentose; branches usually glabrate.
Leaves subcoriaceous, oblanceolate to obovate or oblong-obovate, 9-26 cm long, 2-7 cm wide, lateral veins 15-22 pairs, upper surface with somewhat prominent and impressed lateral and tertiary veins, glabrate, lower surface with slightly raised veins, densely pale brown or rarely whitish tomentose, sometimes glabrate, margins entire, somewhat revolute, apex acute or occasionally short-acuminate, base attenuate, petioles 1-3(-5) cm long.
Flowers unisexual (and the plants dioecious), 9-12 in cauline or axillary, simple, corymbose inflorescences, peduncles 15-20 mm long, pedicels ca. 1-2 mm long, bracts subulate, 1.3-10 mm long; calyx cup-shaped, sepals distinct or 2 of them basally connate, 2.2-4.5 mm long, densely pale brown tomentose, margins ciliate; petals cream, 13-16 mm long; filaments 7-9 mm long, those of pistillate flowers ca. 3.5 mm long; fertile anthers 2.2-2.8 mm long, those of pistillate flowers ca. 1-1.5 mm long; ovary 2(3)-carpellate.
Capsules cuboid to slightly compressed oblong-obovoid, (28-)30-80 mm long, usually brown tomentose, ± eventually glabrate, apex subemarginate to emarginate, the usually persistent style ca. 2-5 mm long, the valves with woody exocarp 3-9 mm thick, with a shallow median furrow, the surface smooth to finely rugulose-roughened, seed mass not filling upper 1/4 of capsule volume.
Seeds ca. 40-45, black to reddish black, reniform to irregularly angled, compressed, 7-10 mm long.