Acalypha lamiana (Leandri) I.Montero & Cardiel., 2018

Munoz, Iris Montero, Cardiel, Jose Maria & Levin, Geoffrey A., 2018, Nomenclatural review of Acalypha (Euphorbiaceae) of the Western Indian Ocean Region (Madagascar, the Comoros Archipelago, the Mascarene Islands and the Seychelles Archipelago), PhytoKeys 108, pp. 85-116: 85

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Acalypha lamiana (Leandri) I.Montero & Cardiel.

comb. nov.

17. Acalypha lamiana (Leandri) I.Montero & Cardiel.   comb. nov.

Acalypha reticulata var. urophylla f. lamiana   Leandri, Notul. Syst. (Paris) 10: 263. 1942.


Madagascar, Prov. Mahajanga, Reserve de Marohogo, 28 Dec 1938, H. J. Lam & A. D. J. Meeuse, 6127 (lectotype, designated here: P [P05604417]!; isolectotype: L [L0242109]!).


Madagascar, Prov. Antananarivo, Tsarasaotra, Feb 1898, H. Perrier de la Bâthie 457 P [P05604408!, P05604409!, P05604410!, P05604413!]; Madagascar, Prov. Fianarantsoa, Ankirihitra près du mont Tsilondroina   , Mar 1902 , H. Perrier de la Bâthie 9817 P [P05604403]!, 9817 bis P [P05604404!, P05604405!]; Madagascar, Prov. Mahajanga, NW of Ankazobe, Vallée de l’Ikopa, 14 Mar 1930, R. Decary 7535 P [P05604421]!; Massif de l’Ankarafantsika, 11 Jan 1938, R. Decary 12876 P [P05604420]!; Bekodoka, 17 Sept 1930, R. Decary 8109 P [P05604422]!; Region d’Antsalova, 1932-1933, J. Leandri 998 P [P05604411]!; Tsingy du Bemaraha, 3-6 Oct 1932, J. Leandri 176 P [P05604415]!; Dokolahy, Feb-Apr 1933, J. Leandri 602 P [P05604414]!; Madagascar, Prov. Toliara, Soahazo Forest, 100 m, 22 Oct 1932, J. Leandri 414 P [P05604416]!.


Madagascar (Antananarivo, Fianarantsoa, Mahajanga and Toliara).


Acalypha lamiana   was treated by Leandri (1942) as a form of A. reticulata var. urophylla   (Boivin ex Baill.) Müll.Arg. (treated here as A. urophylla   ). After studying the numerous type collections, it seems clear to us that A. lamiana   must be considered as a distinct species. A. lamiana   differs from A. urophylla   mainly by the leaves that are rounded at the base and reddish at the margins and its subentire, eglandular female bracts vs. leaves that are usually acute at the base and not reddish at the margins and dentate female bracts with small sessile glands at margins, in A. urophylla   .

One of the mentioned syntypes, Perrier de la Bâthie 9817, was wrongly transcribed by Leandri (1942: 263) as “8917”.