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Compilation
Athyrium lewalleanum

2 Images see all

Type of Athyrium lewalleanum Pic.Serm. [family WOODSIACEAE]
Holotype of Athyrium lewalleanum Pic. Ser. [family WOODSIACEAE]
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Name

Identification
Athyrium lewalleanum Pic.Serm. [family WOODSIACEAE ] (stored under name); Verified by Not on sheet,
Related name
  • Athyrium lewalleanum

Flora

Entry for ATHYRIUM lewalleanum Pic. Serm. [family WOODSIACEAE]
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, (2003) Author: BERNARD VERDCOURT
Names
ATHYRIUM lewalleanum Pic. Serm. [family WOODSIACEAE], in Webbia 27: 440, f. 18 (1973) (‘1972’). Type: Burundi, Bubana, road towards Mabaye, R. Nyamagana, Lewalle 3433 (Herb. Pic. Ser. 24934, holo., Herb. Lewalle, iso.)
Information
Rhizome long-creeping, slender; scales pale brown or dark-marked, triangular, 0.2–1.2 mm long, 0.3–0.4 mm wide, acuminate, cordate at the base, mixed with multicellular hairs. Fronds few, paired or solitary, 15–40 cm tall; stipe 12–24.5 cm long, minutely pubescent or ± glabrous or with few scales at base. Lamina ± triangular-hastate in outline, 11.5–22 cm long, 12–26 cm wide, with scattered flattened white multicellular hairs, essentially trifid, the apical part pinnate with 12 or more pairs of pinnae; pinnae lanceolate, up to 5 cm long, 1.8 cm wide, attenuate at the apex, deeply pinnatifid with ± 10 pairs of pinnatifid segments about 2–7 mm wide; lateral parts similar to apical but with lowest basiscopic pinna well developed, up to 10 cm long; rachis shortly pubescent. Sori round, ± 1 mm in diameter, 1–10 per segment; indusium sub-reniform, fixed on one side only, persistent or ± disintegrating and scarcely visible.
Range
DISTR. T 4
Altitude range
900 m
Distribution
TANZANIA Kigoma District Kasye Forest, 18 Mar. 1994, Bidgood et al. 2788! & same locality, 19 Mar. 1994, Bidgood et al. 2806!
Distribution (external)
; Burundi
? Zambia (see note)
Notes
Kornaś (in K.B. 33: 101 (1978)) has described a very similar plant A. annae (Type: Zambia, Kalungwishi R. gorge below Lumangwe Falls, Kornaś & Medwecka–Kornaś 3746 (KRA, holo., K!, Herb. Pic. Serm., iso.) differing in a number of small points. I suspect it is conspecific. Frazer-Jenkins has annotated the Kew isotype suggesting the centro-basally attached indusium is wrong for Athyrium and that the species might be a Ctenitis or Hypodematium but it does not seem to fit well in either.

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