Cyrtorchis monteiroae (Rchb.f.) Schlechter (1914:596)

Azandi, Laura, Stevart, Tariq, Sonké, Bonaventure, Simo-Droissart, Murielle, Avana, Marie-Louise & Droissart, Vincent, 2016, Synoptic revision of the genus Cyrtorchis Schltr. (Angraecinae, Orchidaceae) in Central Africa, with the description of a new species restricted to submontane vegetation, Phytotaxa 267 (3), pp. 165-186 : 180-181

11. Cyrtorchis monteiroae (Rchb.f.) Schlechter (1914:596) .( Fig.3A ) Basionym: Listrostachys monteiroae Reichenbach (1877: 76) . Homocolleticon monteiroae (Rchb.f.) Szlachetko & Olszewski (2001: 728) . Type:— ANGOLA. Bembi, 1873, H.C. Monteiro s. n. (holotype W, isotype K!)

Heterotypic synonyms: Angraecum antennatum Kräenzlin (1893: 61) . Type:— CAMEROON. Barombi-Station, P.R.Preuss 418 (holotype K!).

Cyrtorchis droogmansiana (De Wild.) Schlechter (1918: 130) . Listrostachys droogmansiana De Wildeman (1902: 426) . Type:— DEMOCRATIC REPUBLIC OF THE CONGO. Chutes du Lubi, 7 April 1902, L.Gentil s. n. (holotype BR!).

Additional specimens examined:— SIERRA LEONE. Gegbwema ( Tunkia ), August 1951, Deighton 5717 (K) ; Ex Fairo ( Soro ), 12 December 1953, Deighton 5977 (K) . LIBERIA. Gbarnga district, Belefanai , 6 December 1947, Baldwin 10543 (K) . IVORY COAST. Lapako à Okromodou , 9 June 1974, Perez-Vera 644 ( P) . CAMEROON. Bertoua , near catholic mission, 16 November 1960, Breteler 695 (K, P, YA) ; Akom II (route Kribi-Ebolowa), campement à 3 h de marche au Sud du village, le long de la rivière à environ 60 m du campement, 710 m, 3 October 2007, Droissart et al. ( Ombrière de Yaoundé ) 768 ( BRLU) ; Nguti, exploitation forestière, village d’Edjuigang, 155 m, 4 October 2004, Droissart et al. ( Ombrière de Yaoundé ) 149 ( BRLU) ; Cameroon Mont , Buea ; 975 m, 27 August 1946, Dundas FHI 15302 (K); ibid., 914 m, 4 September 1947, Gregory 181 (K) ; Forest around Kupe mountain, Tombel , Etam reserve forest, 600 m, 20 August 1986, Etuge & Thomas 216 (K) ; Pl. de Bipinde, près Lokunzo , September 1918, Zenker 45 ( P) ; 19 km Loum-Yabassi , 3 km N of Solé, 30 December 1971, Leeuwenberg 9033 (K) ; Benyandon (35 km N Bafia), 14 September 1966, Letouzey 7882 (K, P, YA) ; Barombi-station , s. d., Preuss 418 (K) ; Mt Kupe , 850 m, 6 September 1992, Cable 101 (K) ; Sine loc., March 1892, Sander & CO s. n. (K) ; Batouri district, Bertoua to Dimako , along river Zo , 28 October 1968, Sanford 5894 ( P) ; Nkoubar , prairie marécageuse, 7 October 2002, Stévart & Pial 679 ( BRLU) ; Petit Mbasakok, zone de Bouamir, Réserve du Dja , 635 m, 18 September 2003, Stévart & Pial 922 ( BRLU) ; Meme Division. 10 kms west of Banga, near Mukete plantation, 50 m, 30 October 1985, Thomas 4900 ( YA) ; sur la route entre Ma’an et Meyo-centre, cacaoyère, 556 m, 6 October 2014, Droissart et al. ( Ombrière de Yaoundé ) 5585 ( BRLU) ; environs du village de Ma’an, cacaoyère, 518 m, 7 October 2014, Droissart et al. ( Ombrière de Yaoundé ) 5601 ( BRLU) ; ibid., 547 m, 10 October 2014, Droissart et al. ( Ombrière de Yaoundé ) 5640 ( BRLU) . CENTRAL AFRICAN REPUBLIC. Boukoko , 10 October 1947, Tisserant 343 ( P) ; ibid., 22 October 1948, Tisserant 1219 ( P) ; ibid., 9 September 1953, Tisserant 2587 ( P) ; Ngoto , bord de la Lobaye, 4 October 1951, Tisserant s. n. ( P) ; ibid., 22 September 1968, Badré 169 ( P) . SÃO TOME ET PRINCIPE. Porto Real , 1956, Rose 139 ( P) ; Bom Sucesso, parc National d’Obo , 400 m, 3 October 1997, Stévart & De Oliveira 205 (K) ; Nova Ceilão , 450 m, 26 August 1997, Stévart 78 ( BRLU) ; Piedade , 400 m, 3 October 1997, Stévart 205 ( BRLU) ; Principe, Morro Fundao , 370 m, 1 August 1998, Stévart 496 ( BRLU) . GABON. Haute-Ogooué, Migoungangui , 6 May 1930, Le Testu 8073 ( P) ; ibid., Tomisimba , 10 May 1931, Le Testu 8802 ( P) ; Koum (Mont) à 1 km du village de Kumassi, à 32 km d’Oyem vers Bitam , 625 m, 13 April 2002, Stévart 1310 ( BRLU) . REPUBLIC OF THE CONGO. Galerie à 8 km de Boko-Songho, vers Madingou , 21 July 1963, de Néré 1667 ( P) . DEMOCRATIC REPUBLIC OF THE CONGO. Yangambi, île Esali (fleuve Congo ), 8 km sur la route de Ngazi , 3 November 1935, Louis 568 ( P) ; ibid., falaises de l’Isalowe, 28 July 1937, Louis 5662 ( P) ; ibid., 17 August 1938, Louis 10889 ( P) ; Mugungura , October 1938, Gille 158 ( P) . UGANDA. North West side of lake Nabugabo , 1,140 m, 9 October 1953, Drummond & Hemsley 4730 (K) ; Entebbe , 1,067 m, May 1902, s. coll. 6 (K) ; ibid., 1,097 m, June 1902, s. coll. s. n. (K) ; ibid., 6 September 1905, Brown 239 (K) ; ibid., 1,173 m, October 1938, Glhandler 2489 (K) ; Sissa-Kisubi road, 1,189 m, September 1937, Glhandler 1996 (K) ; Sine loc., 14 November 1963, Leakey 215 (K) ; Mabira forest , 1,219 m, 8 November 1938, Loveridge 22 (K) ; Lake Nabugabo , Masaka, 1,219 m, November 1934, Synge 1165 (K) ; Kipays , 1,219 m, 1 August 1914, Dummer s. n. (K) ; 13 miles Kampala-Entebbe road, 1,173 m, October 1932, Eggeling 567 (K) ; ibid., October 1932, Eggeling 942 (K) . ANGOLA. Bembi , April 1873, Monteiro s. n. (K) .

Additional specimens examined with unspecified country: —sine loc., s. d. Boss 7332 (K).

Distribution:— According to Govaerts et al. (2016), Cyrtorchis monteiroae occurs in fourteen countries ( Sierra Leone, Liberia, Ivory Coast, Ghana, Nigeria, São Tomé and Príncipe, Equatorial Guinea, Cameroon, Central African Republic, Gabon, Republic of the Congo, Democratic Republic of the Congo, Uganda and Angola), although we have not examined any material from Ghana, Nigeria and Equatorial Guinea. Cyrtorchis monteiroae is thus distributed in Upper Guinea, Lower Guinea and Congolian Domains.

Habitat and ecology:— Evergreen forests. Usually found near rivers or lakes, between 50 and 1,219 m elevation. Flowering peaks in September and October.

Figures

FIGURE 3. Illustrative pictures of some central African taxa of the genus Cyrtorchis. A. C. arcuata. B. C. arcuata subsp. whytei. C. C. aschersonii. D. C. brownii. E. C. chailluana. F. C. hamata. G. C. henriquesiana. H. C. injoloensis. I. C. letouzeyi. J. C. monteiroae. K. C. ringens. L. C. submontana. Photographs ‘A–G’ & ‘I–L’ by Droissart Vincent and ‘H’ by Lourens Grobler.