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categories depending upon their growth habits and habitats they occupy. For a proper
ecosystem balance, the preservation of fern richness is necessary.
Table 1. List of species addition to the flora of Thiruvananthapuram district
SL. No. Name of species Locality
1 Helminthostachys zeylanica Breamore
2 Odontosoria chinensis Ponmudi
3 Pteris blumeana Muthipara
4 Dryopteris concolor Elangium
5 Dryopteris ludens Kattilakuzhy
6 Selaginella wallichi Upper Sanitorium
7 Tectaria paradoxa Breamore
8 Christella parasitica Idinjar
9 Nephrolepis cordifolia Malamari
10 Cyclosorus interuptus Pottenkunnu
Table 2. List of RET species reported from Thiruvananthapuram district
Sl. No. Name of species Status
1 Angiopteris evecta Rare
2 Asplenium grevillei Rare
3 Cyathea gigantea Rare
4 Helminthostachys zeylanica Rare
5 Pteris multiaurita Rare
6 Pteris reptans Rare
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