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This species is accepted, and its native range is Nigeria to Cameroon.

[KBu]

Roux, J. (2004). Three New Species of Dryopteris (Pteropsida: Dryopteridaceae) from West Africa. Kew Bulletin, 59(2), 207-217. doi:10.2307/4115851

Type
Cameroon, Mt Cameroon, Tongo Camp, (6700 ft) 2036 m, 17 D. Maitland 1046 (K!, holotypus).
Morphology General Habit
Plants terrestrial
Vegetative Multiplication Rhizomes
Rhizome short-decumbent, up to 8 mm in diameter, closely set with roots, persistent stipe bases and scales, the scales up to 24 x 3 mm, dull ferrugineous, thinly chartaceous, sessile, narrowly lanceolate to subulate, broadly cuneate, dentate, regularly set with capitate glands along the margin and on the scale lamina, often also with one or more pluricellular outgrowths which distally terminate in a short series of thin-walled oblong cells, the apex terminates in a short series of oblong thin-walled cells
Morphology Leaves
Fronds crowded, suberect to arching, up to 900 mm long
Morphology Leaves Stipes
Stipe proximally castaneous, stramineous higher up, proximally adaxially flattened, shallowly sulcate higher up, up to 390 mm long, up to 6 mm in diameter, closely set with clavate glands, proximally densely set with spreading scales, moderately scaled higher up, the scales up to 24 x 3.5 mm, similar to those on the rhizome, but paler and reducing in size distally
Morphology Leaves Leaf lamina
Lamina lanceolate to ovate, up to 455 x 300 mm, to 2-pinnate-pinnatifid, with up to 14 petiolated pinna pairs, distally the pinnae become sessile and eventually adnate and increasingly basiscopically decurrent
Morphology Leaves Rachis
Rachis stramineous, adaxially shallowly sulcate, narrowly winged near the apex, closely set with clavate glands and initially moderately scaled, the scales fugaceous, up to 5 x 1 mm, ferrugineous, thinly chartaceous, sessile, narrowly lanceolate to subulate, cuneate, entire to dentate, irregularly set with capitate glands along the margin and on the scale lamina, or with one or more pluricellular outgrowths mostly from near the base, the apex terminates in a short series of oblong thin-walled cells
Morphology Leaves Pinnae
Pinnae stalked, the stalk up to 8 mm long, proximally spaced to slightly overlapping, near opposite to alternate, the basal pinna pair longest, to 1-pinnate-pinnatifid, basal pinnae up to 215 x 95 mm, mostly not conspicuously basiscopically developed, narrowly ovate, lanceolate or oblong-acuminate towards the apex, with up to 10 stalked pinnule pairs Rachis stramineous, narrowly winged towards the apex, adaxially shallowly sulcate, sparsely set with clavate glands and filiform scales, abaxially moderately to closely set with clavate glands, moderately set with scales, the scales stramineous, thinly chartaceous, similar to, but smaller than those on the rachis
Morphology Leaves Pinnules
Pinnules stalked, the stalk up to 1 mm long, alternate, proximally widely spaced, more closely spaced distally, firmly herbaceous, proximally pinnatifid, progressively more shallowly lobed distally, basiscopic pinnule on basal pinna up to 50 x 12 mm, acroscopic pinnule on basal pinna up to 50 x 12 mm, narrowly triangular to oblong-acute
Morphology General
Costa shallowly sulcate adaxially, glabrous adaxially, abaxially closely set with clavate glands and scales, the scales up to 2.5 x 0.3 mm, stramineous, chartaceous, sessile, subulate, the margins and scale lamina regularly set with clavate glands, the apex terminates in a short uniseriate series of thin-walled cells Segments sessile, up to 7 x 4.5 mm, broadly ovate-obtuse, lobes up to 6 x 3 amm, oblong, truncate to obtuse, shallowly dentate, adaxially with a few clavate hairs and isocytic hairs along and between the veins, abaxially closely set with clavate glands (62 -)111(- 146) μm long along and between the veins, and isocytic hairs up to 340 μm long mostly near the veins Stomata mostly of the polocytic type, (44 -)54(- 70) μm long
Morphology Leaves Leaf veins
Venation anadromous, catadromous towards the apex, immersed adaxially, evident abaxially, ending in the teeth near the margin
Morphology Reproductive morphology Sori
Sori 2-seriate on the segments and lobes, inframedial, up to 1.5 mm in diameter, confluent at maturity
Morphology Reproductive morphology Sori Indusium
Indusium ferrugineous, firmly herbaceous, up to 2 mm in diameter, reniform, strongly incurved, entire to shallowly repand, glabrous or (rarely) with a few clavate glands along the margin and surface
Morphology Reproductive morphology Sporangia
Sporangium stalk simple, glandular or haired, capsule with (13 -) 14(- 23) indurated annulus cells, epistomium (4 -)6(- 8)-celled, hypostomium (5 -)6(- 9)-celled
Morphology Reproductive morphology Spores
Spores brown, 64 per sporangium, monolete, plano- convex, perispore asper, with low and narrow reticulate ridges, exospore (48 -)56(- 68) x (34 -)37(- 48) μm.
Distribution
Dryopteris glandulosopaleata appears to be restricted to Cameroon and mountainous regions in adjacent Nigeria. In Cameroon the species is restricted to Mt Cameroon.
Ecology
Occurring at altitudes ranging between 1520 and 2250 m, where it grows in light shade on and amongst rocks in riverbeds. In Nigeria the species is known from Naraguta where it grows among rocks in a riverbed.
Note
This species differs from Dryopteris pentheri (Krasser) C. Chr. in the scales being regularly set with glands along the margin and on the scale lamina. In D. pentheri glands rarely occur along the scale margin, but have never been observed on the scale lamina. This species also differs from D. pentheri in the absence of 2-celled hairs from the lamina axes and veins. The glands in D. glandulosopaleata are shorter, (62 -)111(- 146) μm, than those in D. pentheri where they are (60 -) 137(- 260) μm long. On the lamina of D. glandulosopaleata these glands occur adaxially, but more frequently abaxially along the veins and on the lamina between the veins. In D. pentheri glands are restricted to the lamina axes and veins. Furthermore, clavate glands often occur along the indusium margin and surface, a feature which has not been observed in D. pentheri.

Native to:

Cameroon, Nigeria

Dryopteris glandulosopaleata J.P.Roux appears in other Kew resources:

First published in Kew Bull. 59: 211 (2004)

Accepted by

  • Roskov Y. & al. (eds.) (2018). World Ferns: Checklist of Ferns and Lycophytes of the World Species 2000 & ITIS Catalogue of Life Naturalis, Leiden, the Netherlands.

Literature

Kew Bulletin

  • Roux, J. P. (2000). The genus Polystichum (Dryopteridaceae) in Africa. Bull. Nat. Hist. Mus. London (Bot.) 30: 33-79.
  • Holmgren, P. K., Holmgren, N. H. & Barnett, L. C. (eds.) (1990). Index Herbariorum. Part 1. The herbaria of the world, 8th edn. Regnum Veg. 120: 1 - 693.
  • Fraser-Jenkins, C. R. (1986). A classification of the genus Dryopleris (Pteridophyta: Dryopteridaceae). Bull. Brit. Mus. (Nat. Hist.), Bot. 14: 183-218.
  • Gibby, M., Jermy, A. C., Rasbach, H., Rasbach, K., Reichstein, T. & Vida, G. (1977). The genus Dryopteris in the Canary Islands and Azores and the description of two new tetraploid species. Bot. J. Linn. Soc. 74: 251 - 277.
  • Lovis, J. D. (1977). Evolutionary patterns and processes in ferns. Advances Bot. Res. 4: 229 - 415.
  • Widén, C.-L., Lounasmaa, M., Vida, G. & Reichstein, T. (1975). Die Phloroglucide von drei Dryopteris- Arten van den Azoren sowie zwei Arten von Madeira und den Kanarischen Inseln zum Vergleich. Helv. Chim. Acta 58: 880 - 904.
  • --- Jaeger, P. & Adam, J. G. (1971). Le massif des Monts Loma. V. Pteridophytes Filicales. Mém. Inst. Fondam. Afrique Noire 86: 114 - 177.
  • Wagner, W. H. (1971). Evolution of Dryopteris in relation to the Appalachians. In: P. C. Holt (ed.), The distributional history of the biota of the southern Appalachians. Part II, Flora. Research Division Monograph 2: 147-191. Virginia Polytechnic Institute and State University, Blacksburg, Virginia.
  • Alston, A. H. G. (1959). The ferns and fern allies of West tropical Africa (Supplement to the flora of West Africa, 2nd edn, London). Crown Agents for Overseas Governments and Administrations, London.
  • --- (1953). Les pteridophytes de l'Afrique intertropicale Française. Mém. Inst. Franç. Afrique Noire 28: 1 -241.
  • --- & Des Abbayes, H. (1951). In: H. Des Abbayes, A. H. G. Alston & M. L. Tardieu-Blot, Contribution à la flore des Pteridophytes d'A.O.F. (Guinée et Côte d'Ivoire). Bull. Inst. Franç. Afrique Noire 13: 79 - 86.
  • Tardieu-Blot, M. L. (1943). Fougères de Guinée. Bull. Soc. Bot. France 90: 94- 97, 116- 118.
  • Jeanpert, M. E. (1910). Fougères récoltées par M. Pobéguin au Fouta-Djallon (Côte occidentale d'Afrique). Bull. Mus. Natl. Hist. Nat. 7: 403 - 404.

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0