Synonyms: Citriobatus APNI*
Description: Trees or erect high shrubs, pubescent or glabrous, occasionally the smaller branches spiny.
Leaves alternate, sometimes appearing whorled, linear to lanceolate or obovate, margins entire and sometimes undulate or rarely toothed; petiolate.
Flowers terminal or axillary, pedicellate, solitary or in few- to many-flowered cymes, corymbs, racemes, panicles or clusters. Sepals free. Petals linear or oblanceolate, white to yellow, usually fused over part of their length to form a tube, the apices spreading or recurved, or sometimes free to the base. Stamens free; anthers ovate or oblong, shorter than the filaments. Ovary almost sessile, hairy or glabrous, incompletely 2-locular, style short.
Fruit a capsule, 1-locular, ovoid to globose or obovoid, often ± compressed, initially somewhat fleshy and often resinous, dehiscing loculicidally; valves 2–5, hard, remaining fused at base, bearing the placentas along their centre; seeds often angular, not winged, immersed in a resinous viscid fluid.
Distribution and occurrence: World: 150 species, western Pacific, Hawaiian Is, Australia, southern Asia, Africa. Australia: 11 species (9 species endemic), all States.
Several species are cultivated as ornamentals.
Text by R. O. Makinson
Taxa not yet included in identification key
| ||Key to the species|| |
|1||Short shoots present; adult leaves clustered or alternate, usually not whorled at end of branches||2|
|Short shoots absent; adult leaves usually appearing whorled at end of branches||9|
|2||Short shoots spinescent in most developmental stages; stems usually scabrid; fruit indehiscent (dehiscent in Pittosporum oreillyanum)||3|
|Short shoots never spinescent; stems ridged and generally glabrescent, never scabrid; fruit dehiscent, always 2- or 3-valved|
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|3||Flowers with petals pale orange on inner surface and maroon on outer surface; leaves with lamina c. 6 mm long||Pittosporum oreillyanum|
|Flowers cream-coloured; leaves with lamina greater than 8 mm long|
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|4||Leaves almost orbicular; margin angular-dentate; petals hairy on inner surface; fruit orange||Pittosporum multiflorum|
|Leaves elliptic or obovate; margin lacking angular teeth; petals glabrous; fruit green, maturing to black-brown|
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|5||Leaves alternate, not stem clasping||Pittosporum lancifolium|
|Leaves mainly clustered in groups of 3 or more, stem clasping|
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|6||Leaves 8–15 mm long; fruit to 25 mm diameter, thick-walled||Pittosporum spinescens|
|Leaves 20–25 mm long; fruit less than 10 mm diameter, thin-walled|
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|7||Sepals with distinctive woolly fringe of hairs; flowers held below leaves on long, pendant stalks; fruit 3-valved||Pittosporum erioloma|
|Sepals without woolly hairs; flowers held amongst leaves; fruit usually 2-valved|
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|8||Leaves oblong or linear to narrowly elliptic, falcate, glabrous; petiole c. 10 mm long||Pittosporum angustifolium|
|Leaves narrowly ovate to narrowly oblong, not falcate, abaxial surface densely hairy; petiole 2–3 mm long|
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|9||Fruit with thick woody, often warty valves; valves >2 mm thick; shrub to c. 3 m high||Pittosporum revolutum|
|Fruit leathery, not woody nor warty; valves c. 1–2 mm thick; tall shrub or tree to 15 m high|
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|10||Leaf margin undulate, occasionally flat; lamina ovate or elliptic to narrowly obovate, 6–15 cm long, 1.5–4 cm wide, glabrous, with apex acute to acuminate; petals white to cream-coloured||Pittosporum undulatum|
|Leaf margin flat, slightly revolute; lamina obovate to narrowly so, (3-)4–7(-9) cm long, 1.3–2(-2.5) cm wide, abaxial surface pale green with whitish hairs, with apex bluntly acute to obtuse; petals purplish red|
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