Polystichum transvaalense N.C.Anthony

First published in Contr. Bolus Herb. 10: 146 (1982)
This species is accepted
The native range of this species is Cameroon to Kenya and S. Africa. It is a perennial or lithophyte and grows primarily in the subtropical biome.

Descriptions

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/120183732/120183736

Conservation
LC - least concern
[IUCN]

Dryopteridaceae, JP Roux, M Shaffer-Fehre, B Verdcourt. Flora of Tropical East Africa. 2007

Type
South Africa, Transvaal, Pietersburg District, Woodbush Forest Reserve, Bredenkamp & Van Vuuren 450 (BOL!, holo.; PRE!, iso.)
Morphology General Habit
Terrestrial or epiphyte.
Vegetative Multiplication Rhizomes
Rhizome short-creeping or erect, up to 8 mm in diameter, with dense reddish-brown linear to lanceolate rhizome scales up to 14 × 1 mm, with outgrowths towards tip, apex an acicular cell
Morphology Leaves
Fronds tufted, 5–17 per plant, suberect to arching.
Morphology Leaves Stipes
Stipe reddish-brown at base, straw-coloured or green above, 20–54 cm long, 5 mm in diameter, with adaxial groove, with dense reddish-brown ovate scales 6.5–20 × 1.4–6 mm, the larger sessile, smaller stalked, tapering towards acicular cell at apex, twisted.
Morphology Leaves Leaf lamina
Lamina herbaceous, adaxially pale to dark green, abaxially pale green, ovate to narrowly ovate, 40–67 × 12–25 cm, 2-pinnate.
Morphology Leaves Rachis
Rachis straw-coloured, with dense short-stalked twisted reddish brown scales up to 4.5 mm long, terminating in an acicular cell, margins an irregular fringe.
Morphology Leaves Pinnae
Pinnae to 26 free pairs, to 140 × 28 mm, the proximal slightly reduced and often deflexed, with up to 20 oblongattenuate pairs of free pinnules, acroscopically developed towards the middle of the lamina; costa straw-coloured with adaxial groove densely scaly, scales smaller than, but resembling those of rachis; pinnules asymmetric, ovate to obliquely rhomboid, up to 15 mm long, acroscopically auriculate, basal pinnules often pinnatifid, the margins toothed to crenate, often with short awns, adaxially almost smooth or at the base of the costa with few scales, abaxially moderately covered with twisted narrowly linear to triangular scales up to 2.5 mm long; venation evident
Morphology Reproductive morphology Sori
Sori terminal or near terminal on abbreviated vein branches, discrete at maturity, circular, ± 1 mm in diameter; sporangium with 10–20 indurated annulus cells; indusium straw-coloured, peltate, round, rarely incomplete simple or often with a few central processes, 0.5–1 mm in diameter, persistent
Morphology Reproductive morphology Spores
Spores brown, ornamentation of tubercles, inflated or compressed reticulate ridges and some spines.
Figures
Figure 10: 5-6, figure 11:5
Ecology
Moist forest, less often in dry evergreen forest or bamboo, often near water; terrestrial or occasionally epiphytic; 1350–2700 m
Conservation
Widespread; least concern (LC)
Note
For the differences with the similar P. wilsonii, see the Note under that species.
Distribution
Flora districts: U1 U2 K1 K3 K4 K6 K7 T2 T3 T 4 , 6, T7 Range: Mt Cameroon and Bioko, mountains of E CongoKinshasa, S Sudan, Ethiopia, Zambia, Malawi, Zimbabwe, South Africa
[FTEA]

Uses

Use
None recorded for our area
[FTEA]

Sources

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2023. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Science Photographs

    • Copyright applied to individual images