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42. Alectra Thunberg, Nov. Gen. Pl. 81. 1781.

黑蒴属 hei shuo shu

Description from Flora of China

Melasma P. J. Bergius.

Herbs, erect, rigid, blackened when dry, scabrous. Leaves opposite or sometimes apically alternate; leaf blade margin entire or serrate, veins 3. Flowers in bracteate terminal spikes or racemes. Bracteoles 2, opposite. Calyx campanulate; lobes 5, valvate. Corolla subcampanulate; lobes 5, wide, spreading flat, imbricate; lower lobe outer in bud. Stamens 4, didynamous; anther locules parallel, distinct, bases mucronate. Style long, bent; stigma elongated, ligulate. Capsule subglobose, included, loculicidal; valves entire or 2-parted. Seeds numerous, minute.

About 30 species: tropical Africa, America, and Asia; one species in China.


 

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