Newsletter
Tectaria siifolia (Willd.) Copel.
by Nor Ezzawanis Abdullah Thani

In Peninsular Malaysia, the genusTectaria has been treated as a member of either the Dennstaedtiaceae (Holttum 1954, 1991), Aspidiaceae (Piggott 1988) or Dryopteridaceae (Turner 1995; Parris & Latiff 1997). However according to the most recent molecular phylogenetic classification (Smith et al. 2006; Parris 2010), Tectariabelongs to the family Tectariaceae.

Tectaria is a pantropic genus with c. 210 species. In Malesia, almost all its species are terrestrial forest plants, but some occur as rheopyhtes or only grow on rocks or are confined to limestone areas (Holttum 1991).

There are about 32 species of Tectaria in Peninsular Malaysia (Turner 1995; Parris & Latiff 1997). In general, Tectaria species are characterized by their fronds which range from simple to amply divided; the more-or-less anastomosing veins; and the sori that are positioned at the ends of free veins or on connected veins. The sori are usually round and indusiate, but sometimes are spreading and without indusia.

Tectaria siifolia (Willd.) Copel. is distributed throughout Malesia and is quite local in occurrence (Holttum 1991). In Peninsular Malaysia, it was previously recorded only from Perak and Pahang, often near limestone or sometimes as a terrestrial fern. However, during our fieldtrip to Gua Teja in Kelantan in 2009, this species was also discovered on the limestone there.

Tectaria siifolia has a short-creeping to sub-erect rhizome. The rhizome is covered by narrow, stiff and dark brown scales. The stipes are purple to chestnut-coloured towards the base and may reach up to 30 cm long in sterile fronds, or up to 50 cm long in the fertile fronds. The lamina is three or five-foliolate. It is thinly coriaceous with a glabrous surface, except for the more-or-less hairy costae beneath and the densely hairy rachis covered by very short pale hairs. The terminal pinnae are about 17 × 7.5 cm in sterile fronds or 7.5 × 3 cm in fertile fronds. In the trifoliate fronds, the terminal pinnae are often ovate with a rounded base and a short acuminate apex.

However, in the five-foliolate fronds, the terminal pinnae are usually elliptical with a narrow cuneate base. The lateral pinnae are about 15 × 6.5 cm in sterile fronds or 6.5 × 2.5 cm in fertile fronds. They are sessile, unequal at the base, broadly rounded on the basiscopic side but narrower on the acroscopic side, with entire margin and a caudate-acuminate apex. Vegetative buds, which are often found in the axils of these lateral pinnae and the great differences in size between the sterile and fertile fronds are characterisitics of the species. The venation of the sterile fronds consists of fairly regular cross-veins which enclose two-rows of areoles with included free veinlets, while in the fertile fronds, the venation is made up of fewer areoles. The sori are arranged in two fairly regular rows between each pair of main lateral veins and are quite large. The indusia are thin and easily detach and are shed at an early stage.

References

  1. Holttum, R.E. (1954). A Revised Flora of Malaya: Ferns of Malaya, Volume 2. Government Printing Office, Singapore. pp. 643.
  2. Holttum, R.E. (1991). Flora Malesiana. Series 2 - Pteridophyta, Volume 2, Issue/No. 1. Rijksherbarium/Hortus Botanicus, Leiden University, The Netherlands, Netherlands. pp. 132.
  3. Parris, B.S. & Latiff, A. (1997). Towards a Pteridophyte Flora of Malaysia: A Provisional Checklist of Taxa. Malayan Nature Journal 50: pp. 235-280
  4. Parris, B.S., Kiew, R., Chung, R.C.K., Saw, L.G. & Soepadmo, E. (2010). Flora of Peninsular Malaysia, Series I: Ferns and Lycophytes, Volume 1. Forest Research Institute Malaysia (FRIM), Malaysia. pp. 249.
  5. Piggott, A.G. (1988). Aspidiaceae. Ferns of Malaysia in Colour. pp. 317-353
  6. Smith, A.R., Pryer, K.M., Schuettpelz, E., Korall, P., Schneider, H. & Wolf, P.G. (2006). A classification for extant ferns. Taxon 55 (1-4)
  7. Turner, I. (1995). A Catalogue of the Vascular Plants of Malaya. The Gardens' Bulletin Singapore 47 (1 & 2): pp. 265
QR Code
Scan QR code for mobile experience

Other articles

Trachypithecus obscurus (Reid, 1837)

Nurfarhana Hizan Binti Hijas   •   30 Sep 2019   •   142 views

Caryota mitis Lour.

Tan Kok Kiat   •   30 Aug 2019   •   235 views

Rhacophorus norhayatii Chan and Grismer, 2010

Nur Athirah Binti Fauzi & Kaviarasu Munian   •   31 Jul 2019   •   378 views

Zosterops palpebrosus Temminck, 1824

Nur Alwani Binti Zakaria   •   30 Jun 2019   •   257 views

Lepisanthes rubiginosa (Roxb.) Leenh. (Sapindaceae)

Syazwani Bt. Azeman   •   31 May 2019   •   259 views
Today, there are less than 200 Malayan tigers left in our country.
#SaveOurMalayanTiger. Visit www.harimau.my
Malaysia Biodiversity Information System (MyBIS)
Copyright © 2019, Ministry of Water, Land and Natural Resources (KATS). All rights reserved. DISCLAIMER - The Malaysian Government, and Ministry of Water, Land and Natural Resources (KATS) shall not be liable for any loss or damage caused by the usage of any information obtained from this website. By entering this site, you acknowledge and agree that no portion of this site, including but not limited to names, logos, trademarks, patents, sound, graphics, charts, text, audio, video, information or images are either MyBIS property or the property permitted by third-party and shall not be used without prior written approval from the owner(s).
Best viewed using latest Mozila Firefox, Google Chrome and Internet Explorer 10 with Resolution 1024 x 768px or above. Version 2.0 / 2016