A checklist of Rubiaceae species from Eastern Samar, Visayas, Philippines

Ordas, Jorge Anton D.; Pinarok, Neil Alejandro A.; Romeroso, Roanne Benesisto; Alejandro, Grecebio Jonathan D.; Banag-Moran, Cecilia I.

doi:10.15560/15.2.295

Cited by 13 publications

(13 citation statements)

References 17 publications

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“…Nonetheless, T. alejandroanus is currently known in two locations within the Samar Island Natural Park (SINP). The specimen collected in one of the locations (Mt Calbiga, Taft) dates back to 1948; the species has not been recollected in this locality since then, in spite of extensive botanical explorations made by the Philippine National Herbarium (1948–1996) in Samar and by the team which prepared the checklist of Eastern Samar Rubiaceae (Ordas et al ). The specimen notes indicate that T. alejandroanus was found on the ridge of a dipterocarp forest, a type of habitat that was exploited for timber prior to the legal declaration of SINP as a protected area in 2003.…”

Section: Resultsmentioning

confidence: 99%

Taxonomic novelties and changes in Philippine Timonius (Rubiaceae, Guettardeae)

Chavez

Meve

Liede‐Schumann

2020

Nordic Journal of Botany

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Section: Resultsmentioning

confidence: 99%

Taxonomic novelties and changes in Philippine Timonius (Rubiaceae, Guettardeae)

Chavez

Meve

Liede‐Schumann

2020

Nordic Journal of Botany

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“…The most recent collections of Rubiaceae was done by Ordas et al (2019) is NE. The species were assessed using the preliminary conservation assessment by Sohmer and Davis (2007) based on the IUCN criteria.…”

Section: Discussionmentioning

confidence: 99%

“…Purposive sampling was employed in the study. The collection was done along and approximately 10 m adjacent to trails at the study sites (Ordas et al 2019). All plants having the characters of Rubiaceae were collected during their reproductive stages to ensure precise identification of species.…”

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confidence: 99%

Short Communication: Rediscovery of Psychotria species, subspecies, and varieties collected in the 1990s and new records of Antirhea benguetensis (Elmer) Valeton and Ixora longifolia Smith (Rubiaceae) in Northern Sierra Madre Natural Park, Luzon, Philipp

Biag

Alejandro

2020

Biodiversitas

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Abstract. Biag RD, Alejandro GJD. 2020. Short Communication: Rediscovery of Psychotria species, subspecies and varieties collected in the 1990s and new records of Antirhea benguetensis (Elmer) Valeton and Ixora longifolia Smith (Rubiaceae) in Northern Sierra Madre Natural Park, Luzon, Philippines. Biodiversitas 21: 4524-4535. Tagged as the “last great forest” for it possesses the widest remaining tropical rainforest in the island of Luzon, the Northern Sierra Madre Natural Park (NSMNP) in the province of Isabela is worth-conserving. Owing to the species richness and high levels of endemism in the said area, it was identified as a key biodiversity area for conservation and protection. After a botanical exploration in the park conducted from April to August 2019, 89 Rubiaceae species were found dominated by the genus Psychotria. These Psychotria species were then separated from other genera and were morphologically examined and eventually identified. This study, therefore, primarily aims to provide the list of Psychotria species that were collected long before, particularly in the 1990s and still exist in NSMNP continuously battling against the catastrophic activities within the forest. Eight Philippine endemic Psychotria species and varieties were recollected. As to their current conservation status following IUCN criteria, we herein propose these species, except for Psychotria pubilimba, to be treated as Data Deficient (DD) since there is lack of distributional data for these species. Additional surveys are to be conducted on the areas where these species were previously collected. In this way, information on population size and threats to the species can also be obtained. P. pubilimba is restricted to Cagayan and Isabela. Only one mature individual has been found; hence, a Narrow Endemic Species (NES). Being an NES, it was then assessed as Critically Endangered (CR) based on IUCN rules. It is also worth noting that new records of Antirhea benguetensis and Ixora longifolia species were found in the park, particularly in Divilacan, Isabela. The former has been regarded as Luzon endemic, known to be distributed only in Benguet, Ilocos Sur, Rizal, and Bataan. The latter, on the other hand, is mostly distributed in the provinces of Visayas and Mindanao, and only Masbate and Palawan for Luzon. Moreover, this flora has been recorded in other parts of the world like China, India, Myanmar, Indonesia, Malaysia, and Vietnam.

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“…In the Philippines, few studies on this forest type have been conducted (Tolentino et al 2020). The presence of Rubiaceae species has been revealed in the limestone forests in the Philippines, particularly in Dinagat Island (Lillo et al 2019), Eastern Samar (Ordas 2019), Rajah Sikatuna Protected Landscape, Bohol (Aureo 2020), Paranas, Samar Island Natural Park (Villanueva et al 2021), Metropolitan Ilocos Norte Watershed Forest Reserve (Batuyong 2020). The high floral richness that has been recorded on this type of forest is still underestimated (Clements et al 2006;Tolentino et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Diversity, distribution, and conservation status of Rubiaceae species in Peñablanca Protected Landscape and Seascape, Luzon, Philippines

Biag

Alejandro

2021

Biodiversitas

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Abstract. Biag RA, Alejandro GJD. Diversity, distribution, and conservation status of Rubiaceae species in Peñablanca Protected Landscape and Seascape, Luzon, Philippines. Biodiversitas 22: 3627-3636. Peñablanca Protected Landscape and Seascape (PPLS) is the largest protected area (PA) in the province of Cagayan, Luzon, Philippines. As part of the Sierra Madre Mountain Range and being contiguous with the Northern Sierra Madre Natural Park, there is no doubt that this PA would display species endemism and richness. Hence, botanical surveys through purposive sampling in seven barangays/districts were conducted in the PPLS to determine the species diversity and distribution of Rubiaceae. This study also aims to identify the endemic species and determine their conservation status. Forty-two species of Rubiaceae belonging to 19 genera and 13 tribes were documented in the current study. The most species-rich tribes are Spermacoceae (9 sp.), followed by Psychotrieae (7 sp.), Pavetteae (6 sp.), Naucleae (5 sp.), Ixoreae (4 sp.), Aleisantheae (2 sp.), Mussaendeae (2 sp.), and Vanguerieae (2 sp.). The rest of the tribes, i.e., Augusteae, Coffeeae, Gardenieae, Knoxieae, and Morindeae, are represented by a single species. Minanga, Nabbabalayan and Sisim harbor the most species. Results show that 19 Philippine endemic species are thriving in the PPLS. Of these, four are threatened species; one is near threatened, three being least concern, two as data deficient, and the rest were not evaluated.

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A checklist of Rubiaceae species from Eastern Samar, Visayas, Philippines

Cited by 13 publications

References 17 publications

Taxonomic novelties and changes in Philippine Timonius (Rubiaceae, Guettardeae)

Taxonomic novelties and changes in Philippine Timonius (Rubiaceae, Guettardeae)

Short Communication: Rediscovery of Psychotria species, subspecies, and varieties collected in the 1990s and new records of Antirhea benguetensis (Elmer) Valeton and Ixora longifolia Smith (Rubiaceae) in Northern Sierra Madre Natural Park, Luzon, Philipp

Diversity, distribution, and conservation status of Rubiaceae species in Peñablanca Protected Landscape and Seascape, Luzon, Philippines

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