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Family Loganiaceae

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).

Fruit capsular, berry-like or drupaceous; seeds 1–many.


Distribution and occurrence: World: c. 22 genera, c. 349 species, tropical & subtropical, with a few extending to warm temperate regions. Australia: 7 genera, c. 75 species, all States.

External links:
Angiosperm Phylogeny Website (Family: Loganiaceae, Order: Gentianales)
Wikipedia

Text by B. J. Conn
Taxon concept:

 Key to the genera 
1Herbs2
Trees, shrubs or woody climber3
2Styles 2, only fused apically; flowers 4-merous; capsule loculicidal, 2-horned apicallyMitrasacme
Style 1; flowers 5-merous; capsule septicidal, lacking distal horns
                       Back to 1
Logania
3Woody climber; sepals free at baseGelsemium
Shrub or small tree; sepals fused
                       Back to 1
4
4Leaves with 3–5 more or less longitudinal veins from base; axillary spines usually present; treesStrychnos
Leaves penniveined; spines absent; herbs or undershrubs
                       Back to 3
Logania

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