FIGURE 9. Distribution of Scaphochlamys baukensis, S. endauensis, S. tahanensis and S. johorensis... more FIGURE 9. Distribution of Scaphochlamys baukensis, S. endauensis, S. tahanensis and S. johorensis and their most similar taxa.
FIGURE 2. Scaphochlamys baukensis. A. Plants in loose clumps. B. Habit. C. Inflorescence. D. Flow... more FIGURE 2. Scaphochlamys baukensis. A. Plants in loose clumps. B. Habit. C. Inflorescence. D. Flower. Photos by Y.Y. Sam.
FIGURE 4. Scaphochlamys endauensis. A. Habit. B. Hairs on under surface midrib. C. Floral bract. ... more FIGURE 4. Scaphochlamys endauensis. A. Habit. B. Hairs on under surface midrib. C. Floral bract. D. First bracteole. E. Ovary and calyx. F. Lateral corolla lobe. G. Dorsal corolla lobe. H. Staminode. I. Labellum. J. Stamen front view (J'), side view (J''), back view (J'''). K. Stigma front view. L. Fruit. M. Seed front view (M'), side view (M''). A–M from Y.Y. Sam, K. Apok & H.L. Kueh FRI 50204 (KEP).
Twenty species of Polyosma are currently recorded for Borneo, ten are new and they are described ... more Twenty species of Polyosma are currently recorded for Borneo, ten are new and they are described here: P. cyanoides, P. dewildei, P. fulva, P. glabrescens, P. grandiflora, P. matangensis, P. melanophylla, P. murudensis, P. parvifolia and P. pseudobracteosa. Provisional conservation assessments are made for all the newly described species. One species is assessed Endangered (EN), four Vulnerable (VU), one Near Threatened (NT), one Least Concern (LC) and three Data Deficient (DD).
Malaysia has an estimated 15,000 species of vascular plants. Located in the Malesian region, its ... more Malaysia has an estimated 15,000 species of vascular plants. Located in the Malesian region, its affinity is Sundaic, having common elements with Sumatra, Java and Palawan. The two halves of Malaysia, Peninsular Malaysia extending from mainland Asia and East Malaysian states of Sabah and Sarawak on the island of Borneo have their own distinct floristic components. Peninsular Malaysia has about 8,200 species of vascular plants and Sabah and Sarawak have an estimated 12,000 species. The flora of Sabah and Sarawak is generally richer than that of Peninsular Malaysia. Due to historical reasons, the flora of Malaysia project is planned in a phased approach. The Tree Flora of Sabah and Sarawak project, initiated in 1991, represents the first systematic modern attempt to document some of the important plant families of these two states. It would take at least another ten years to complete this project. It is estimated that the Flora of Peninsular Malaysia project, initiated in 2005, will t...
We employ the nuclear ribosomal ITS sequences to assess the evolutionary relationships of Araliac... more We employ the nuclear ribosomal ITS sequences to assess the evolutionary relationships of Araliaceae in the Malesian region. Malesian Araliaceae consist of 14 genera and about 500 species. Our analysis suggests a diffuse origin of Araliaceae taxa, with many genera belong to the Asian palmate clade or the tribe Hedereae. The Malesian endemic Harmsiopanax is morphologically unique and its phylogenetic position is not well resolved at present. Several morphologically diverse species of Brassaiopsis perhaps have a relatively recent origin in ...
Malaysia has an estimated 15,000 species of vascular plants. It is geographically divided into tw... more Malaysia has an estimated 15,000 species of vascular plants. It is geographically divided into two halves: Peninsular Malaysia extending from mainland Asia; and the east Malaysian states of Sabah and Sarawak on the island of Borneo. Both these regions have their own distinct floras. Peninsular Malaysia has about 8,300 species of vascular plants while Sabah and Sarawak has an estimated 12,000 species. The rich plant diversity poses many challenges for plant conservation in Malaysia. The Malaysian flora is not completely known. Peninsular Malaysia has a working checklist, for Sabah and Sarawak, an obsolete checklist is available and the list badly requires updating. In the past, plant conservation has not been high on the nation's priority; very few species level conservation activities have been done. However, recent changes in the government have provided opportunities towards a more holistic approach for plant conservation in Malaysia. The Forest Research Institute Malaysia has...
Four new species of Scaphochlamys are described and illustrated, including preliminary conservati... more Four new species of Scaphochlamys are described and illustrated, including preliminary conservation assessments. All the new species are endemic in Peninsular Malaysia.
Understory plants in tropical forests often experience a low-light environment combined with high... more Understory plants in tropical forests often experience a low-light environment combined with high CO2 concentration. We hypothesized that the high CO2 concentration may compensate for leaf carbon loss caused by the low light, through increasing light-use efficiency of both steady-state and dynamic photosynthetic properties. To test the hypothesis, we examined CO2 gas exchange in response to an artificial lightfleck in Dipterocarpus sublamellatus Foxw. seedlings under contrasting CO2 conditions: 350 and 700 μmol CO2 mol(-1) air in a tropical rain forest, Pasoh, Malaysia. Total photosynthetic carbon gain from the lightfleck was about double when subjected to the high CO2 when compared with the low CO2 concentration. The increase of light-use efficiency in dynamic photosynthesis contributed 7% of the increased carbon gain, most of which was due to reduction of photosynthetic induction to light increase under the high CO2. The light compensation point of photosynthesis decreased by 58% ...
Three new species, Gymnostachyum kanthanense Kiew (Acanthaceae), Meiogyne kanthanensis Ummul-Nazr... more Three new species, Gymnostachyum kanthanense Kiew (Acanthaceae), Meiogyne kanthanensis Ummul-Nazrah & J.P.C. Tan (Annonaceae) and Vatica kanthanensis Saw (Dipterocarpaceae), from Gunung Kanthan, Perak, are described and illustrated. All three are Critically Endangered CR B2ab (iii, iv), D1 being known from very small, restricted populations at the type locality. Gunung Kanthan is currently being quarried for cement on a large scale, which if it continues threatened all three species with extinction.
ABSTRACT A total of 20 new localities were recorded for the genus Johannesteijsmannia since 1972,... more ABSTRACT A total of 20 new localities were recorded for the genus Johannesteijsmannia since 1972, demonstrating that the genus is less restricted in its distribution in Malaysia than previously thought. Nevertheless, Johannesteijsmannia is regarded as threatened with J. lanceolata, J. magnifica and J. perakensis assessed as endangered and J. altifrons as vulnerable. Endangered status was given to endemic species with restricted occurrence and small population size found in less than five localities. Recommended conservation measures include the need to expand in situ protection for populations in vulnerable habitats, inclusion of the species into forest management plans, and establishment of a sustainable seed harvesting regime. We also suggest regular monitoring of populations situated along forest boundaries and initiation of long-term conservation biology research. Habitats at risk in Jerantut-Benta (for J. lanceolata), Serendah and Bukit Kinta Forest Reserves (for J. magnifica), and Perak, i.e., Bintang Hijau, Kledang-Saiong and Bubu Forest Reserves (for J. perakensis) should be given protected status and ex situ conservation should be implemented.
Twelve species of Polyosma are recognised for Peninsular Malaysia and Singapore, of which only th... more Twelve species of Polyosma are recognised for Peninsular Malaysia and Singapore, of which only three species are in Singapore. One new species is described, the taxonomy of two species is clarified with five names synonymised, and all names are typified. Provisional conservation assessments are provided for each species.
FIGURE 9. Distribution of Scaphochlamys baukensis, S. endauensis, S. tahanensis and S. johorensis... more FIGURE 9. Distribution of Scaphochlamys baukensis, S. endauensis, S. tahanensis and S. johorensis and their most similar taxa.
FIGURE 2. Scaphochlamys baukensis. A. Plants in loose clumps. B. Habit. C. Inflorescence. D. Flow... more FIGURE 2. Scaphochlamys baukensis. A. Plants in loose clumps. B. Habit. C. Inflorescence. D. Flower. Photos by Y.Y. Sam.
FIGURE 4. Scaphochlamys endauensis. A. Habit. B. Hairs on under surface midrib. C. Floral bract. ... more FIGURE 4. Scaphochlamys endauensis. A. Habit. B. Hairs on under surface midrib. C. Floral bract. D. First bracteole. E. Ovary and calyx. F. Lateral corolla lobe. G. Dorsal corolla lobe. H. Staminode. I. Labellum. J. Stamen front view (J'), side view (J''), back view (J'''). K. Stigma front view. L. Fruit. M. Seed front view (M'), side view (M''). A–M from Y.Y. Sam, K. Apok & H.L. Kueh FRI 50204 (KEP).
Twenty species of Polyosma are currently recorded for Borneo, ten are new and they are described ... more Twenty species of Polyosma are currently recorded for Borneo, ten are new and they are described here: P. cyanoides, P. dewildei, P. fulva, P. glabrescens, P. grandiflora, P. matangensis, P. melanophylla, P. murudensis, P. parvifolia and P. pseudobracteosa. Provisional conservation assessments are made for all the newly described species. One species is assessed Endangered (EN), four Vulnerable (VU), one Near Threatened (NT), one Least Concern (LC) and three Data Deficient (DD).
Malaysia has an estimated 15,000 species of vascular plants. Located in the Malesian region, its ... more Malaysia has an estimated 15,000 species of vascular plants. Located in the Malesian region, its affinity is Sundaic, having common elements with Sumatra, Java and Palawan. The two halves of Malaysia, Peninsular Malaysia extending from mainland Asia and East Malaysian states of Sabah and Sarawak on the island of Borneo have their own distinct floristic components. Peninsular Malaysia has about 8,200 species of vascular plants and Sabah and Sarawak have an estimated 12,000 species. The flora of Sabah and Sarawak is generally richer than that of Peninsular Malaysia. Due to historical reasons, the flora of Malaysia project is planned in a phased approach. The Tree Flora of Sabah and Sarawak project, initiated in 1991, represents the first systematic modern attempt to document some of the important plant families of these two states. It would take at least another ten years to complete this project. It is estimated that the Flora of Peninsular Malaysia project, initiated in 2005, will t...
We employ the nuclear ribosomal ITS sequences to assess the evolutionary relationships of Araliac... more We employ the nuclear ribosomal ITS sequences to assess the evolutionary relationships of Araliaceae in the Malesian region. Malesian Araliaceae consist of 14 genera and about 500 species. Our analysis suggests a diffuse origin of Araliaceae taxa, with many genera belong to the Asian palmate clade or the tribe Hedereae. The Malesian endemic Harmsiopanax is morphologically unique and its phylogenetic position is not well resolved at present. Several morphologically diverse species of Brassaiopsis perhaps have a relatively recent origin in ...
Malaysia has an estimated 15,000 species of vascular plants. It is geographically divided into tw... more Malaysia has an estimated 15,000 species of vascular plants. It is geographically divided into two halves: Peninsular Malaysia extending from mainland Asia; and the east Malaysian states of Sabah and Sarawak on the island of Borneo. Both these regions have their own distinct floras. Peninsular Malaysia has about 8,300 species of vascular plants while Sabah and Sarawak has an estimated 12,000 species. The rich plant diversity poses many challenges for plant conservation in Malaysia. The Malaysian flora is not completely known. Peninsular Malaysia has a working checklist, for Sabah and Sarawak, an obsolete checklist is available and the list badly requires updating. In the past, plant conservation has not been high on the nation's priority; very few species level conservation activities have been done. However, recent changes in the government have provided opportunities towards a more holistic approach for plant conservation in Malaysia. The Forest Research Institute Malaysia has...
Four new species of Scaphochlamys are described and illustrated, including preliminary conservati... more Four new species of Scaphochlamys are described and illustrated, including preliminary conservation assessments. All the new species are endemic in Peninsular Malaysia.
Understory plants in tropical forests often experience a low-light environment combined with high... more Understory plants in tropical forests often experience a low-light environment combined with high CO2 concentration. We hypothesized that the high CO2 concentration may compensate for leaf carbon loss caused by the low light, through increasing light-use efficiency of both steady-state and dynamic photosynthetic properties. To test the hypothesis, we examined CO2 gas exchange in response to an artificial lightfleck in Dipterocarpus sublamellatus Foxw. seedlings under contrasting CO2 conditions: 350 and 700 μmol CO2 mol(-1) air in a tropical rain forest, Pasoh, Malaysia. Total photosynthetic carbon gain from the lightfleck was about double when subjected to the high CO2 when compared with the low CO2 concentration. The increase of light-use efficiency in dynamic photosynthesis contributed 7% of the increased carbon gain, most of which was due to reduction of photosynthetic induction to light increase under the high CO2. The light compensation point of photosynthesis decreased by 58% ...
Three new species, Gymnostachyum kanthanense Kiew (Acanthaceae), Meiogyne kanthanensis Ummul-Nazr... more Three new species, Gymnostachyum kanthanense Kiew (Acanthaceae), Meiogyne kanthanensis Ummul-Nazrah & J.P.C. Tan (Annonaceae) and Vatica kanthanensis Saw (Dipterocarpaceae), from Gunung Kanthan, Perak, are described and illustrated. All three are Critically Endangered CR B2ab (iii, iv), D1 being known from very small, restricted populations at the type locality. Gunung Kanthan is currently being quarried for cement on a large scale, which if it continues threatened all three species with extinction.
ABSTRACT A total of 20 new localities were recorded for the genus Johannesteijsmannia since 1972,... more ABSTRACT A total of 20 new localities were recorded for the genus Johannesteijsmannia since 1972, demonstrating that the genus is less restricted in its distribution in Malaysia than previously thought. Nevertheless, Johannesteijsmannia is regarded as threatened with J. lanceolata, J. magnifica and J. perakensis assessed as endangered and J. altifrons as vulnerable. Endangered status was given to endemic species with restricted occurrence and small population size found in less than five localities. Recommended conservation measures include the need to expand in situ protection for populations in vulnerable habitats, inclusion of the species into forest management plans, and establishment of a sustainable seed harvesting regime. We also suggest regular monitoring of populations situated along forest boundaries and initiation of long-term conservation biology research. Habitats at risk in Jerantut-Benta (for J. lanceolata), Serendah and Bukit Kinta Forest Reserves (for J. magnifica), and Perak, i.e., Bintang Hijau, Kledang-Saiong and Bubu Forest Reserves (for J. perakensis) should be given protected status and ex situ conservation should be implemented.
Twelve species of Polyosma are recognised for Peninsular Malaysia and Singapore, of which only th... more Twelve species of Polyosma are recognised for Peninsular Malaysia and Singapore, of which only three species are in Singapore. One new species is described, the taxonomy of two species is clarified with five names synonymised, and all names are typified. Provisional conservation assessments are provided for each species.
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