Derivation of specific name
(
anglais
)
fourni par Flora of Zimbabwe
alstonii: named after A.H.G. Alston (1902-1958), Britisch botanist specialised in African pteridophytes.
- licence
- cc-by-nc
- droit d’auteur
- Mark Hyde, Bart Wursten and Petra Ballings
- citation bibliographique
- Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Isoetes alstonii C.F.Reed & Verdc. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=198930
- auteur
- Mark Hyde
- auteur
- Bart Wursten
- auteur
- Petra Ballings
Description
(
anglais
)
fourni par Flora of Zimbabwe
Pseudo-corm 10-20 cm in diameter, 2-lobed; bud scales vestigial or lacking. Leaves 10-40, linear, 130-400 mm × 1 mm (apically)- 6 mm (at base),apex tapering to a point, yellow to midgreen, semi-circular in cross-section, abruptly ovate-oblong at the base, with broadly hyaline wing, stomata present in upper parts of the leaves. Ligule 1-2 × c. 1.5 mm, hyaline, triangular, pointed. Velum very narrow, reduced to a thin marginal ring. Sporangia 4-10 × 3-6 mm. Megaspores of 2 sizes, 0.52 and 0.3 mm in diameter, dark grey, drying white, usually 3-radiate, with large warts below, granulated above.
- licence
- cc-by-nc
- droit d’auteur
- Mark Hyde, Bart Wursten and Petra Ballings
- citation bibliographique
- Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Isoetes alstonii C.F.Reed & Verdc. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=198930
- auteur
- Mark Hyde
- auteur
- Bart Wursten
- auteur
- Petra Ballings
Worldwide distribution
(
anglais
)
fourni par Flora of Zimbabwe
Ethiopia, Mozambique, Namibia, Tanzania, Zambia, Zimbabwe.
- licence
- cc-by-nc
- droit d’auteur
- Mark Hyde, Bart Wursten and Petra Ballings
- citation bibliographique
- Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Isoetes alstonii C.F.Reed & Verdc. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=198930
- auteur
- Mark Hyde
- auteur
- Bart Wursten
- auteur
- Petra Ballings
Isoetes schweinfurthii: Brief Summary
(
vietnamien
)
fourni par wikipedia VI
Isoetes schweinfurthii là một loài dương xỉ trong họ Isoetaceae. Loài này được Baker mô tả khoa học đầu tiên năm 1860.
- licence
- cc-by-sa-3.0
- droit d’auteur
- Wikipedia tác giả và biên tập viên
