Vitex madiensis subsp. madiensis Verdcourt 1992
Creators: name: Meerts, Pierre
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lamiaceae
Vitex
Vitex madiensis
Vitex madiensis subsp. madiensis verdcourt (1992: 60)

description: <b>11a.</b> <i>Vitex madiensis</i> subsp. <i>madiensis</i> Verdcourt (1992: 60); Pauwels (1993: 217); Lebrun &amp; Stork (1997: 525); Sales (2001: 196; 2005: 84); Coates Palgrave &amp; Coates Palgrave (2005: 983); Latham &amp; Konda ku Mbuta (2010: 326); Meerts (2016: 231). <i>Vitex camporum</i> Büttn. (Büttner 1890: 35); De Wildeman (1903a: 121; 1909: 127; 1910a: 255; 1912a: 467; 1912b: 47, 367; 1921: 164); De Wildeman &amp; Durand (1900: 49); Durand &amp; De Wildeman (1898: 124); Durand &amp; Durand (1909: 436). – Type: Angola, <i>Welwitsch</i> 5728 (lecto-: BM barcode BM 000839714, <b>designated here</b>; isolecto-: BM barcode BM 000839714, B †). <i>Vitex camporum</i> var. <i>longipedicellata</i> De Wild. (De Wildeman 1909: 127); De Wildeman (1910b: 400; 1912b: 298). – Type: D.R. Congo, Mayombe, Kwamouth, 25 Oct. 1903, <i>E. &amp; M. Laurent</i> s.n. (lecto-: BR barcode BR 0000018430080, <b>designated here</b>; isolecto-: BR barcode BR 0000018430097). <i>Vitex madiensis</i> var. <i>baumii</i> W.Piep. (Pieper 1928: 62); Moldenke (1956: 455). – Type: Angola, Quiriri, <i>Baum</i> 821 (holo-: B †). <i>Vitex madiensis</i> var. <i>schweinfurthii</i> (Gürke) W.Piep. (Pieper 1928: 63); Moldenke (1956: 458) – <i>Vitex schweinfurthii</i> Gürke (Gürke 1893: 170). – Type: South Soudan, Bahr-El-Ghasal, Seriba Ghattas, 7 Jul. 1869, <i>Schweinfurth</i> 2030 (lecto-: Kbarcode K 000192766, <b>designated here</b>; isolecto-: B †). <i>Vitex madiensis</i> var. <i>typica</i> W.Piep. (Pieper 1928: 63); (Delevoy 1929: 483); De Wildeman (1929a: 11, 1929b: 105); Devred (1956: 113). – Type: same as <i>Vitex camporum</i> Büttn. <i>Vitex</i> madiensis var. <i>glaberrima</i> Moldenke (Moldenke 1952: 63). Type: D.R. Congo, Uele, env. Bambesa, <i>Pittery</i> 819 (holo-: BR barcode BR 0000008906205). Asmall tree. Leaves 1–3-foliolate; leaflets coarsely crenate-dentate, smooth above, the middle one long petiolulate. Inflorescence of dichasia, long pedunculate, pedicels with long whitish fine hairs; calyx 2–3 mm, broadly campanulate, broad triangular teeth 0.5–1 mm, with long whitish hairs; corolla whitish-mauve 6–8 mm, stamens included; ovary glabrous. Fruit c. 25–30 mm long. <b>Distribution</b> – Widespread in tropical Africa. <b>Notes</b> – <i>Vitex madiensis</i> subsp. <i>madiensis</i> is probably the most polymorphic <i>Vitex</i> taxon in Africa. Many morphotypes have received a formal taxonomic treatment; some of them have been reported in D.R. Congo by Moldenke (1956): <i>V. madiensis</i> var. <i>schweinfurthii</i> (Gürke) W.Piep. (5 leaflets; e.g. <i>de Bergyck</i> 34, <i>Robyns</i> 3018), <i>V. madiensis</i> var. <i>baumii</i> W.Piep. (leaflet margin entire; e.g. <i>Lebrun</i> 6748), <i>V. madiensis</i> var. <i>glaberrima</i> (glabrous in all parts; e.g. <i>Pittery</i> 819). These taxa are not recognized here. The distribution ranges of <i>V. madiensis</i> subsp. <i>madiensis</i> and subsp. <i>milanjiensis</i> overlap broadly in southern D.R. Congo. Specimens with more or less intermediate characters, possibly of hybrid origin, are occasionally found, especially in savannas of Bas-Congo (e.g. <i>Duvigneaud</i> 252Vi). Lectotypification of <i>Vitex camporum</i> Büttn. <i>Vitex camporum</i> is based on three syntypes which have all been destroyed in Berlin (<i>Büttner</i> 427 &amp; 428; <i>Welwitsch</i> 5728). Two duplicates of <i>Welwitsch</i> 5728 have been found in BM, and one duplicate of <i>Büttner</i> 427 has been found in K (K barcode K001008451); all the duplicates match the description in the protologue. <i>Welwitsch</i> 5728 is a better specimen and one of the two sheets is thus selected as the lectotype. Lectotypification of <i>Vitex camporum</i> var. <i>longipedicellata</i> De Wild. De Wildeman cites one collection from Kwamouth by E. &amp; M. Laurent, s.n., which corresponds to two sheets in BR. The sheet with collecting data on the label is chosen as the lectotype. Lectotypification of <i>Vitex schweinfurthii</i> Gürke. The protologue cites two collections i.e. <i>Schweinfurth</i> 2030 &amp; 2848. These specimens have been destroyed in Berlin. Aduplicate of <i>Schweinfurth</i> 2030 matching the description in the protologue exists in K, and is here selected as the lectotype.
description: Published as part of <i>Meerts, Pierre, 2018, Synopsis of the genus Vitex (Lamiaceae) in the Democratic Republic of the Congo, pp. 380-392 in Plant Ecology and Evolution 151 (3)</i> on page 387, DOI: 10.5091/plecevo.2018.1504, http://zenodo.org/record/7664390
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