Dryopteris kilemensis

discussion

Note — Kuhn (1868: 24) called his new species Aspidium kilmense and cited as collection “ Kilma ”. Kunze (1891: 813) placed it in Dryopteris as D. kilmensis (not “ kilemensis ” as Roux [2009: 122] states). In his checklist, Roux (2009: 122) listed the species as D. kilemensis. However, in his monograph Roux (2012: 63) again named it D. kilmensis, following Kuhn (1868). Kuhn (1868: 24) and Roux (2012: 122) gave the type locality as “ Kilma ”. We have checked the holotype in B (B 20 0051628!), where the collectors Von der Decken & Kersten clearly wrote “ Kilema ad radices montis Kilimandjaro ”. Therefore, the species name must be D. kilemensis.

Checklist of Lycopodiopsida (clubmosses and quillworts) and Polypodiopsida (ferns) of Rwanda

description

DESCRIPTION Plants terrestrial. Rhizome short-decumbent or short and erect, up to 15 mm in diameter, set with roots, crowded stipe bases, and scales, the scales ferrugineous, chartaceous, broadly attached, subulate to narrowly lanceolate, up to 30 × 4 mm, entire, or with a few scattered filiform outgrowths near the apex, the apex short-filiform, terminating in an oblong cell. Fronds caespitose, arching, up to 1.5 m long; stipe base castaneous, stramineous higher up, sulcate adaxially, up to 815 mm long and 9 mm in diameter, proximally densely scaled, subglabrous higher up, the scales ferrugineous to castaneous, chartaceous and often rugate, or thinly crustaceous, broadly attached or sessile, filiform to broadly ovate, up to 40 × 9 mm, truncate to cordate, entire, or with a few scattered filiform outgrowths near the base or apex, occasionally with a few scattered glands (these frequently also occur on the scale laminae), and short uniseriate hairs, the scale apex filiform, terminating in a short uniseriate series of cells, the apical cell oblong or spheroidal, higher up often with glands; lamina herbaceous, broadly ovate, to 4 - pinnate-pinnatifid, anadromous, catadromous towards th

The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul

diagnosis

DIAGNOSTIC FEATURES AND RELATIONSHIPS Dryopteris kilemensis can be separated from all other African Dryopteris species by its large structure, fronds up to 1.5 m long, and the finely dissected lamina, which may be up to 4 - pinnate-pinnatifid. The sessile, broadly ovate, often bullate scales with the apex terminating in a short uniseriate range of cells are also characteristic. VARIATION Dryopteris kilemensis shows little variation in gross morphology, but micromorphological variation was detected in scale morphology, the presence of glands on the lamina, the presence of glands or pluricellular hairs on the sporangium stalk, and the distribution of glands on the indusium lamina. Scale texture appears to be influenced by environmental conditions, as plants occurring in less favourable conditions have scales that are thinly crustaceous rather than chartaceous. The rhizome and frond scales of these plants are generally also broader than those of plants from moist forest habitats. Glands and pluricellular hairs along the scale margins also show variation in frequency. A direct correlation cannot be drawn between habit and the presence of glands occurring on the lamina. Whilst some coll

The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul

discussion

REMARK The correct spelling of the specific epithet is discussed by Pichi Sermolli (1985: 158).

The fern genera Dryopteris and Nothoperanema (Dryopteridaceae) in Madagascar and neighbouring Indian Ocean islands, including Saint Paul