Compilation
Polystichum setiferum

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Name

Identification
Polystichum fuscopaleaceum Alston [family DRYOPTERIDACEAE ] Verified by Alston,A.H.G., Polystichum setiferum (Alston) Schelpe [family DRYOPTERIDACEAE ] (stored under name);
Related name
  • Polypodium setiferum
  • Polystichum setiferum
  • `
  • Polypodium aculeatum
  • Polystichum fuscopaleaceum
  • Tectaria elongata

Flora

Entry for Polystichum wilsonii H.Christ. [family DRYOPTERIDACEAE]
Herbarium
Royal Botanic Gardens, Kew (K)
Collection
Flora of Tropical East Africa
Resource Type
Reference Sources
Entry From
Flora of Tropical East Africa, page 1, (2007) Author: J.P. Roux, Monika Shaffer-Fehre & Bernard Verdcourt
Names
Polystichum wilsonii H.Christ. [family DRYOPTERIDACEAE], in Bot. Gaz. 51: 353 (1911); Roux, Polystichum in Africa: 149 (1998). Type: China, Szechuan, Mupin, Wilson 2614 (BM!, holo.)
Polystichum lobatum Pirotta var. ruwensoriense [family DRYOPTERIDACEAE], in Savoia, Ruwenzori 1: 478 (1909). Type: Uganda, Ruwenzori, Kichuchu–Nakitava, Roccati & Cavalli-Molinelli s.n. (TO, holo.)
Polystichum aculeatum Bonap. var. rubescens [family DRYOPTERIDACEAE], Not. Pterid. 14: 214 (1923). Type: Tanzania, Kilimanjaro, Alluaud 48 (P!, holo.)
Polystichum aculeatum Bonap. var. stenophyllon [family DRYOPTERIDACEAE], Not. Pterid. 14: 215 (1923). Type: Kenya, Mt Kenya W, Alluaud 241 (P!, holo.)
Polystichum fuscopaleaceum Alston [family DRYOPTERIDACEAE], in Bol. Soc. Brot., ser. 2, 30: 22 (1956). Type: Cameroon, Victoria District, Cameroon Mountain, SW of hut no. 2, Keay FHI 28 601 (BM!, holo.)
Polystichum setiferum (Alston) Schelpe var. fuscopaleaceum [family DRYOPTERIDACEAE], in Bol. Soc. Brot., Ser. 2, 41: 216 (1967)
Polystichum fuscopaleaceum (Pirotta) Pic.Serm. var. ruwensoriense [family DRYOPTERIDACEAE], in Webbia 32: 90 (1977)
Information
Terrestrial or lithophytic; rhizome suberect, to 13 cm long and 1 cm in diameter, rarely branched, with dense roots and brown linear paleae to 12≈1 mm, ending in acicular cell. Fronds tufted, 8–12 in number, to 1 m long; stipe brown near base, straw-coloured higher up, 35–45 cm long, 5 mm in diameter, with adaxial groove, sparsely to densely paleate, paleae ovate, 13–23≈7–9 mm with fimbriate margin and darker central part; lamina herbaceous, pale to dark green, narrowly elliptic in outline, (33–)47–63≈8–16 cm, 2-pinnate; rachis straw-coloured, densely paleate with paleae similar to but smaller than those on stipe, to 9≈3 mm; pinnae up to 29 on each side of the rachis, the lowermost reduced and deflexed, the largest to 9≈2 cm; pinnules up to 12 free pairs per pinna, to 12 mm long, long-aristate; venation clear, costa with dense narrowly ovate to triangular scales with long outgrowths on lower margins. Sori (sub-)terminal on abbreviated vein branches, circular, ± 1 mm in diameter; sporangium with 11–24 indurated annulus cells; indusium persistent, straw-coloured, peltate, circular, repand to erose with small, central processes, maximum radial length 1.1 mm. Spores brown, smooth or tuberculate, spiculate. Fig. 10: 9–10 & Fig. 11: 1–3.
Range
DISTR. U 2, 3; K 3–6; T 2, 3, 7 high mountains of Bioko, Cameroon, eastern Congo-Kinshasa, Ethiopia, Zimbabwe and South Africa; temperate and tropical Asia
Altitude range
2350–3650(?–4100) m
Distribution
KENYA Elgeyo District Cherangani, Kamalagon [Kameligon], Aug. 1969, Mabberley & McCall 198!KENYA Naivasha District S Kinangop, Elephant Mt, June 1968, Mwangangi 987!KENYA Meru District Mt Kenya, Ithanguni, Kirui, Feb. 1970, Faden & Evans 70/114!TANZANIA Masai/Mbulu District Ngorongoro, Empakaai, Sep. 1972, Frame 48!TANZANIA Arusha District slopes of little Meru, June 1968, Vesey-Fitzgerald 5710!TANZANIA Kilimanjaro, NW Shira Plateau, Nov. 1968, Bigger 2282!UGANDA Ruwenzori, Mijusi Valley, Hedberg 613! & Nyamagasani valley, Loveridge 197!UGANDA Elgon, Benet, Eggeling 2454!
Notes
USES. None recorded from our area. CONSERVATION Widespread; least concern (LC). P. transvaalense and P. wilsonii occur sympatrically and often grow side by side. P. wilsonii has slightly shorter and narrower fronds, more pronounced reduced and deflexed of the basal pinnae, and an indusium margin that generally is less clearly sculptured; also, the paleae occur on the rachis, while in P. transvaalensis they are restricted to the stipe and the lower rachis. P. wilsonii is prdominantly a high altitude species – although it does occur at lower altitudes as well, where it overlaps with P. transvaalensis. A number of intermediates occur, and a putative hybrid has been described (P. ≈ saltum, Roux 1997).

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