Asplenium sertularioides Baker (1887: 354)

Fischer, Eberhard & Lobin, Wolfram, 2023, Synoptic Revision of Aspleniaceae (Asplenium, Hymenasplenium) of Rwanda, Phytotaxa 608 (1), pp. 1-65 : 41-44

publication ID	https://doi.org/ 10.11646/phytotaxa.608.1.1
DOI	https://doi.org/10.5281/zenodo.8249058
persistent identifier	https://treatment.plazi.org/id/8D3A87D0-FFE9-512B-FF5D-FDC5F8F2B91D
treatment provided by	Plazi
scientific name	Asplenium sertularioides Baker (1887: 354)
status

Treatment

Asplenium sertularioides Baker (1887: 354) View in CoL ( Fig. 1F–G View FIGURE 1 , 22 View FIGURE 22 ).

Holotype: — TANZANIA. Kilimanjaro, Johnson 26 (K, fide Beentje 2008: 66). Not found.

Specimens seen:— Northern Province: Volcano NP, Hagenia-Wald süd̂stl. Karisimbi, westl. Kalago-See, epiphyt., 2300 m, November 1907, J.Mildbraed 1657 (B 20 0022887); Karisimbi, 3150 m, October 1961, S.Antun-Gupffert 1123 ( BR 0000016326088); Karisimbi, piste, Hagenia abyssinica -formatie, 3200 m, 31 January 1972, P. Van der Veken 9207 ( BR 0000024680059); Sabinyo, 3100 m, 28 July 1974, P. Van der Veken 10377 ( BR 0000024680042, B 20 0084650); col entre les volcans Ngahinga et Muhavura, 2950 m, 11 October 1972, J.Lambinon 74/1543 ( BR 0000024680066). Western Province: Nyungwe NP, Mont Bigugu – Terr. Shangugu (= Rusizi), 2800 m, 26 March 1956, A.R.Christiaensen 1623 ( BR 0000008733931); Mont Bigugu – Terr. Shangugu (= Rusizi), 26 March 1956, A.R.Christiaensen 1651 ( BR 0000008734266).

First recorded for Rwanda:— Brause & Hieronymus (1910: 12).

Habitat: —Epiphyte or terrestrial in Hagenia-Hypericum forest, Podocarpus forest or ericaceous shrub, elev. 2800–3200 m.

Distribution in Rwanda:—Northern Province: Volcano NP, Karisimbi, Karisoke.

General distribution: —Africa: Uganda, Rwanda, Tanzania.

Recognition: —In Asplenium loxoscaphoides and A. sertularioides , the pinnae are long tapering in their apical part, which is long acuminate to narrowly acute in its outline, the lowermost acroscopic segment is longer (usually exceeding the adjacent segments for 1/2 of their length) and different in shape from adjacent segments, usu. 6–10 pinnatifid. A. loxoscaphoides has the lowermost acroscopic segment exceeding the adjacent segments, usu. 6-pinnatifid, the lowermost basiscopic segments are similar to adjacent segments and only slightly larger. In A. sertularioides the lowermost segments of the pinna, both the acroscopic and the basiscopic one, are sharply distinct in shape and length from adjacent segments, usually 10-pinnatifid (see also Fig. 1 D–G View FIGURE 1 ).

Note: — Beentje (2008: 66) considers this taxon as unresolved. It is, however, very distinct from Asplenium loxoscaphoides Baker and A. centrafricanum Pic.Serm. (see above).

Brause & Hieronymus (1910: 12) cite under Asplenium sertularioides the specimen Mildbraed 1657. However, this specimen belongs to A. centrafricanum (see note there). But, as stated under A. loxoscaphoides , two collections from Mildbraed, collected in Eastern Congo, belong to A. sertularioides .