Description: Trees, shrubs, woody climbers or herbs; stipules interpetiolar, often reduced to a stipular line, sometimes intrapetiolar.
Leaves usually decussate, simple; margins ± entire.
Inflorescence cymose, sometimes reduced and 1-flowered. Flowers actinomorphic, usually bisexual, or if unisexual then plants dioecious; 5-merous or sometimes 4-merous. Calyx united or free. Corolla united, usually whitish, cream-coloured to yellowish, usually fragrant (sometimes unpleasantly so); lobes valvate, imbricate or contorted in bud. Stamens same number as corolla lobes, inserted on corolla tube; anthers 2-locular, usually basifixed, dehiscence introrse by longitudinal slits. Ovary superior or rarely semi-inferior, 2-locular; ovules 1–many; style usually 1 or rarely 2 (Mitrasacme and Phyllangium).
Fruit capsular, berry-like or drupaceous; seeds 1–many.
Distribution and occurrence: World: 16 genera, c. 460 species, tropical & subtropical, with a few extending to warm temperate regions. Australia: 8 genera, c. 97 species, all States.
Angiosperm Phylogeny Website (Family: Loganiaceae, Order: Gentianales)
Text by B. J. Conn, updated by K.L. Gibbons, July 2019.
| ||Key to the genera|| |
|Trees or shrubs||4|
|2||Calyx, corolla and androecium 4-merous, or calyx absent||3|
|Calyx, corolla and androecium 5-merous|
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|3||Calyx absent; corolla and capsule enclosed in a two-lobed foliaceous involucre; ovary semi-inferior||Phyllangium|
|Calyx present, involucre absent; ovary superior|
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|4||Fruit indehiscent, berry-like; leaves with 3–7 veins from the base; axillary spines usually present||Strychnos|
|Fruit a two-valved capsule; leaves penniveined; spines absent|
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|5||Stamens inserted in middle of corolla tube, anthers included in corolla tube; apex of calyx lobes obtuse; flowers unisexual||Logania|
|Stamens inserted in mouth of corolla tube, anthers exserted from corolla tube; apex of calyx lobes acute; flowers bisexual|
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