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National conservation status categories of the vascular flora of St. John's Island.

National conservation status categories of the vascular flora of St. John's Island.

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St. John's Island, officially known as Pulau Sakijang Bendera, has 258 vascular plant species from 81 families, of which 154 species are native, 76 are non-native and 28 are cryptogenic weeds. The native species include 22 nationally Critically Endangered species, 15 nationally Endangered species, 20 nationally Vulnerable species, 96 species that a...

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... vascular flora of St. John's Island consists of two species of fern allies, 23 species of ferns, one species of gymnosperm, and 232 species of angiosperms, giving a total of 258 species belonging to 81 families (Appendix 1). Out of these, 154 species (59.7%) are native, of which 57 species (22.1%) are threatened, meaning that they are nationally classified as Presumed nationally Extinct, Critically Endangered, Endangered, or Vulnerable (Table 1; Fig. 2). Non-native or exotic species make up 29.5% or a total of 76 species (Table 1; Fig. 2). ...
Context 2
... of these, 154 species (59.7%) are native, of which 57 species (22.1%) are threatened, meaning that they are nationally classified as Presumed nationally Extinct, Critically Endangered, Endangered, or Vulnerable (Table 1; Fig. 2). Non-native or exotic species make up 29.5% or a total of 76 species (Table 1; Fig. 2). This may be an underestimate as we focused on verifying or adding to the list of native species. ...

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... The species is found on a few islands located within Singapore's first Marine Park; these islands include Pulau Subar Laut (Big Sister's Island), Pulau Sakijang Bendera (St. John's Island) and Pulau Tekukor (Hung et al., 2017a(Hung et al., , 2017b(Hung et al., , 2017c. Remarks. ...
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This paper is the eighth instalment of the continuing series on the tree species of the floristically diverse Nee Soon Swamp Forest, Singapore's last substantial tract of intact freshwater swamp forest. Here, we provide a key and species descriptions based on characters observable in the field and from dried specimens for the 14 species of the five genera of the family Sapotaceae found there. These five genera are: Madhuca (three species), Palaquium (six species), Payena (one species), Planchonella (three species) and Sarcosperma (one species). Of these, Sarcosperma paniculatum is a recent rediscovery in Singapore, and together with Palaquium microphyllum and Planchonella maingayi, represents a new record for the flora of the Nee Soon Swamp Forest. Madhuca tomentosa is a misapplied name and is determined to be another Madhuca species (here called Madhuca sp. 1), the identification or formal description of which await the collection of fertile specimens.