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FOC | Family List | FOC Vol. 16 | Gentianaceae

1. Exacum Linnaeus, Sp. Pl. 1: 112. 1753.

藻百年属 zao bai nian shu

Annuals. Stems branched, glabrous. Leaves opposite. Cymes axillary or terminal, paniculate. Flowers 4- or 5-merous. Calyx lobed nearly to base. Corolla rotate, lobes longer than tube. Stamens inserted at throat of corolla tube just below sinus between corolla lobes; anthers cylindric, 2-locular, dehiscing by apical pores. Ovary 2-locular. Capsules 2-valved, many seeded. Seed coat warty.

About 40 species: tropical Africa, tropical and subtropical Asia, Madagascar; two species in China.


1 Stems narrowly winged; calyx 5-6 mm; corolla mauve-blue to lilac; anthers 5.5-6.5 mm   1 Exacum tetragonum
+ Stems terete; calyx 7-10 mm; corolla bright blue drying purplish pink; anthers (6.5-)8-10 mm   2 Exacum teres

Lower Taxa


 

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