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Published In: Species Plantarum 2: 592. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Contributor Text: I.C. Hedge
General/Distribution: 3 species in Europe and Asia. One species is occasionally cultivated in our area.


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Perennial aromatic herbs. Stems erect, quadrangular, glabrous or with eglandular or glandular hairs, leafy. Leaves ovate, cordate, long-petiolate, crenate. Flowers in verticillasters borne in axils of upper leaves. Bracts present. Calyx tubular-campanulate, 13-nerved, clearly bilabiate; upper lip ± flat, shortly 3-toothed, somewhat recurved in fruit; lower lip 2-toothed; tube with or without villous hairs internally but not bearded. Corolla bilabiate; tube exserted from calyx, without an internal annulus; upper lip ± straight, emarginate; lower lip 3-lobed, spreading. Stamens 4, didynamous, included or very shortly exserted; thecae bilocular, glabrous, divergent. Stylar branches subequal. Nutlets ovoid, basally attenuate, smooth, often mucilaginous on wetting.
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