Derivation of specific name
provided by Flora of Zimbabwe
lewalleana: type specimen was collected in Burundi by J. Lewalle, a Belgian botanist.
- license
- cc-by-nc
- copyright
- Mark Hyde, Bart Wursten and Petra Ballings
- bibliographic citation
- Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Dryopteris lewalleana Pic.Serm. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=101860
- author
- Mark Hyde
- author
- Bart Wursten
- author
- Petra Ballings
Description
provided by Flora of Zimbabwe
Rhizome shortly-creeping, becoming erect at the growing tip, up to 160 × 25 mm; rhizome scales straw- to rust-coloured, ovate to linear-acuminate, up to 18 × 4 mm, margins entire or with a few outgrowths, apex thread-like.
Fronds tufted to spaced at rhizome apex, suberect to arching, up to 1.35 m long, herbaceous.
Stipe up to 67 cm long, pale brown to greenish above, chestnut-coloured below, with straw- to rust-coloured scales, ovate to narrowly lanceolate, up to 25 × 6 mm, denser near the base.
Lamina up to 73 × 64 cm, ovate to deltate in outline, 3-pinnatifid to 3-pinnate, up to 14 pairs of pinnae, spaced below and somewhat overlapping near the lamina apex.
Pinnae up to 32 × 25 cm, forming an angle of 70-80° from the rhachis, usually not reduced and basiscopically developed, basal pair inequilaterally triangular to deltate in outline.
Pinnules: acroscopic pinnule smaller than basiscopic pinnule on basal pinnae; ultimate segments narrowly ovate-obtuse to oblong-obtuse, shallowly to deeply lobed, margins serrate, glabrous on both surfaces but with a few minute hairs and scales along the costules and costae, costules narrowly winged for most of the length.
Rhachis straw-coloured with a few straw-to rust-coloured scales similar to but smaller than those on the stipe, narrowly winged towards the apex.
Sori round, c. 1.6 mm in diameter, medial on the veins; indusia kidney-shaped, entire, persistent, brown, up to 1.6 mm in diameter, glabrous.
- license
- cc-by-nc
- copyright
- Mark Hyde, Bart Wursten and Petra Ballings
- bibliographic citation
- Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Dryopteris lewalleana Pic.Serm. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=101860
- author
- Mark Hyde
- author
- Bart Wursten
- author
- Petra Ballings
Worldwide distribution
provided by Flora of Zimbabwe
Southern Africa, extending to central and east Africa.
- license
- cc-by-nc
- copyright
- Mark Hyde, Bart Wursten and Petra Ballings
- bibliographic citation
- Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Dryopteris lewalleana Pic.Serm. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=101860
- author
- Mark Hyde
- author
- Bart Wursten
- author
- Petra Ballings
Dryopteris lewalleana: Brief Summary
(
Vietnamese
)
provided by wikipedia VI
Dryopteris lewalleana là một loài dương xỉ trong họ Dryopteridaceae. Loài này được Pic. Serm. mô tả khoa học đầu tiên năm 1985. Danh pháp khoa học của loài này chưa được làm sáng tỏ.
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- cc-by-sa-3.0
- copyright
- Wikipedia tác giả và biên tập viên