Asplenium mildbraedii Hieron.

Fischer, Eberhard & Lobin, Wolfram, 2023, Synoptic Revision of Aspleniaceae (Asplenium, Hymenasplenium) of Rwanda, Phytotaxa 608 (1), pp. 1-65 : 30-33

Asplenium mildbraedii Hieron. in Brause & Hieronymus (1910: 21) ( Fig. 14 , 15 ).

Lectotype (designated here):—D.R. CONGO. Vulkan-Gebiet , Ninagongo (= Nyiragongo), Region der subalpinen Sträucher, ca 3000 m, 3 Oktober 1907, J.Mildbraed 1369 (B 20 0018113!) ( Fig. 15 ).

Protologue citation: —“Vulkan-Gebiet: Ninagongo, Region der subalpinen Sträucher, ca. 3000 m.ü.M., Okt. 1907, [Mildbraed] n. 1369 (B 20 0018113!); Randberge bei Kahama, lichtere Stellen im Bambusmischwald unter Hypericum -Gebüsch, 2300–2400 m.ü.M., Nov. 1907, [Mildbraed] n. 1779 (B 20 0018114!).—Usambara, Bergwald bei Magamba oberhalb Kwai, 2400–2600 m.ü.M., Okt. 1902, A.Engler n. 1288 (B 20 0018112!).—Wahrscheinlich geĥrt hierher auch ein in Usambara bei Lutindi von Liebusch im Jahre 1900 (B 20 0018053!) gesammeltes unvollständiges Exemplar und ein junges steriles Blatt einer jungen Pflanze, die Graf von Goetzen auf dem Ninagongo unter n. 43 sammelte (B 20 0018117!).“

Specimens seen:— Northern Province: Volcano NP, Flanc sud du Sabyinyo, Préfect. Ruhengeri (= Musanze ), 1 February 1972, P.Bamps 3033 ( BR0000016310568 ) ; Gahinga , in bamboo forest, 20 March 2022, E.Fischer s.n. ( KOBL) ; Kinigi , 25 June 1961, S.C.Antun-Gupffert 1012 ( BR0000024681025 ) . Western Province: Weg Gisenyi (= Rubavu) – Kibuye (= Karongi ) km 33, Gishwati-woud , 6 February 1972, P. Van der Veken 9249 ( BR0000016310742 ) ; Rutsiro (préfect. Kibuye = Karongi ), 28 July 1974, J.Lambinon 74/588 ( BR0000016310674 ) ; Wisumo, centre forestier suisse, commune Gisovu, Préfecture Kibuye (= Karongi ), 31 May 1978, G.Troupin 15998 ( BR0000016310735 ) ; Mont Muzimu. Préfecture Cyangugu (= Rusizi ), 8 September 1974, O.Ubonabenshi 83 ( BR0000016326118 ) ; Kamiranzovu – terr. Shangugu (= Rusizi ), 17 March 1956, A.R.Christiaensen 1168 ( BR0000016310643 ) ; Forêt de Rugege (= Nyungwe), road Butare to Cyangugu (= Rusizi ), km 93, 28 September 1974, J.Rammeloo 4089 ( BR0000016310704 ) ; Pindura – mont Bigugu, Préfect. Cyangugu (= Rusizi ), 4 March 1972, P.Bamps 3287 ( BR0000016310575 ) ; Forêt de Nyungwe, marais Kamiranzovu, Préfecture Cyangugu (= Rusizi ), 14 February 1971, G.Bouxin 253 ( BR0000016310599 ) ; Monti a sud-est del lago Kivu a 45 km da Bukavu lungo la strada per Astrida (= Huye ), 15 August 1956, R.Pichi Sermolli 5331 ( BR0000016310698 ) ; Forêt de Nyungwe, marais du Kamiranzovu, Préfecture Cyangugu (= Rusizi ), 26 January 1971, G.Bouxin 196 ( BR0000016310582 ) ; Forêt de Nyungwe, environs du Kamiranzovu, Préfecture Cyangugu (= Rusizi ), September 1971, G.Bouxin 1219 ( BR0000016310629 ) ; Forêt de Rugege (Cyangugu), Marais du Kamiransovu , aux env. du km 104 de la route Butare – Cyangugu (= Rusizi ), 25 July 1974, P.Auquier 3408 ( BR0000016310544 ) ; environs du lac Kivu, route Nyamasheke – Ntendezi à 10 km de Nyamasheke, Préfecture Cyangugu (= Rusizi ), 27 March 1972, G.Bouxin 1483 ( BR0000016310636 ) ; Shangugu (= Rusizi), route Astrida (= Huye ) – Bukavu , vers km 81, marais Kasale , 25 September 1956, G.Troupin 2650 ( BR0000016310711 ) ; Forêt de Nyungwe, environs du Kamiranzovu, Préfecture Cyangugu (= Rusizi ), September 1971, G.Bouxin 1214 ( BR0000016310612 ) ; Shangugu (= Rusizi), Kamiranjovu (= Kamiranzovu ) – km 60 route Bukavu – Astrida , 17 March1956, A.R.Christiaensen 1668 ( BR0000016310650 ) ; Las wysikokgórski k. Cyangugu, pref. Cyangugu (= Rusizi ), 1 September 1980, K.A.Nowak 853 ( BR0000016310667 ) . Southern Province: Pref. Gikongoro (= Nyamagabe), Nyungwe , 13 January 1982, K.A.Nowak 1934 ( BR0000016310681 ) ; Colline Uwagahunga, près du village Rugera, au sud de la préfecture de Gikongoro (= Nyamagabe ), 6 September 1974, P.Auquier 3944 ( BR0000016310551 ) ; Forêt de Nyungwe, environs de Mugasare, Préfecture Gikongoro (= Nyamagabe ), 17 March 1971, G.Bouxin 513 ( BR0000016310605 ) .

First recorded for Rwanda: — Brause & Hieronymus (1910: 21).

Habitat: —Terrestrial in ravines, bamboo forest or swamps in montane forest, elev. 2000–2820 m.

Distribution in Rwanda:—Northern Province: Mukamira, Volcano NP. Western Province: Gishwati-Mukura NP, Nyungwe NP. Southern Province: Nyungwe NP.

General distribution: —Africa: D.R. Congo, Uganda, Rwanda, Burundi, Tanzania.

Note: —We have chosen the specimen Mildbraed 1369 as lectotype, as it is cited in the protologue (see above) with two other specimens (Engler 1288 B 20 0018112!, and Mildbraed 1779 B 20 0018114!). Mildbraed 1369 is the most typical specimen showing all characteristic features from the protologue.

The specimens from Madagascar, assigned by Tardieu-Blot (1958: 232) to Asplenium mildbraedii , have been described as A. angavokelyense Viane (2021: 40) .

Figures

FIGURE 14. Asplenium mildbraedii.—A Frond.—B–D.Detailof fronds.—E,F.Spores.Photographs:E.Fischer,Gahinga,A–D.E.Fischer, W.Lobin & Y.Malkowsky, E–F, E.Fischer s.n., Gahinga. Scales bars: A, B. 2 cm; C. D. 1 cm. E, F. 10 µm.

FIGURE 15. Asplenium mildbraedii.Lectotype B 20 0018113.Reproduced with permission Herbarium,Botanischer Garten &Botanisches Museum Berlin.