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Published In: Species Plantarum 2: 574. 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: About 70 species in temperate regions of the Old World; mostly in the Mediterranean area. Characteristic features are the regular (not bilabiate) calyces with spinulose teeth, the ± flat spreading upper lip of the corolla and the stamens included in the tube of the corolla. Some species (not in our area) closely approach Stachys.


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Annual (in ours) vinous or pilose small herbs. Stems erect, simple or branched, leafy, with simple eglandular hairs. Leaves not divided, subentire or crenulate, shortly petiolate. Flowers small, in axils of leaves, verticillate. Bracteoles absent. Calyx tubular-campanulate, 5-10-nerved, not bilabiate; teeth equal, as long as tube, conspicuously spinulose; tube bearded at throat. Corolla bilabiate, yellow; tube included within calyx; upper lip straight, flat, emarginate; lower lip 3-lobed. Stamens 4, didynamous, included in the tube of the corolla; thecae bilocular. Style included in corolla tube. Nutlets ovate, scarcely trigonous, apically rounded.
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