@article {4063, title = {Phylogeny of Asian Homalomena (Araceae) based on the ITS Region Combined with Morphological and Chemical Data}, year = {2013}, abstract = {

Abstract\—A phylogenetic analysis of the genus Homalomena (Araceae: Homalomeneae) based on the nITS region is presented. Eighty-nine taxa are included; representing all Asian supergroups, several Neotropical species currently assigned to Homalomena, and selected species of Philodendron. Asian Homalomena is well supported as monophyletic and excludes Neotropical Homalomena. The Cyrtocladon supergroup is monophyletic after transferring the Insignis complex and Havilandii complex into the Punctulata supergroup. The Homalomena and Chamaecladon supergroups are well supported. A reduced phylogeny of 20 accessions representing 15 taxa was used for subsequent morphological and chemical marker optimization. A constricted spathe and four stamens per staminate flower are plesiomorphic for Homalomena. Staminodes among the pistillate zone are lost three times independently in Homalomena supergroup, Punctulata supergroup, and H. vivens. Chemical markers identified from liquid chromatography-mass spectroscopy profiling provided an independent set of markers that further support the separation of Neotropical species of Homalomena from the Asian taxon. Three chemical markers at Rt 2.55 min, 2.69 min, and 2.90 min are shared among the majority of taxa sampled for Asian Homalomena, and Neotropical species currently assigned to Homalomena show two unique peaks at Rt 3.25 min and 3.54 min. Five chemical markers support the Cyrtocladon supergroup with the exception of Homalomena vivens. A chemical marker at Rt 3.60 min is plesiomorphic for the Chamaecladon, Homalomena and Punctulata supergroups. A chemical marker at Rt 2.80 min is apomorphic for the Chamaecladon supergroup, with a separate gain in H. punctulata. This study supports removal of the Neotropical species from Homalomena, redefines the morphological boundaries of Homalomena sensu stricto (i.e. the Asian species), and supports and refines the grouping of Asian species into supergroups.

}, keywords = {Borneo, character mapping, systematics, taxonomy}, doi = {DOI 10.1600/036364413X670430}, author = {Wong, S.Y. and Tan, P.J. and Ng, K.K. and Othman, A.S. and Lee, H.B. and Fasihuddin, B.A. and Boyce, P.C.} } @article {3993, title = {Studies on Schismatoglottideae (Araceae) of Borneo XXXV {\textendash} Seven New species of Aridarum}, journal = {Aroideana; Journal of the International Aroid Society}, volume = {37}, year = {2014}, pages = {32}, chapter = {9}, abstract = {

Seven new species of Aridarum are described and illustrated: Aridarum pendek S.Y.Wong, S.L.Low \& P.C.Boyce and A. velutandrum S.Y.Wong, S.L.Low \& P.C. Boyce [Sarawak, Malaysian Borneo]; A. alatense S.Y.Wong, S.L.Low \& P.C.Boyce, A. surukense S.Y.Wong, S.L.Low \& P.C. Boyce, and A. zygosetum S.Y.Wong, S.L.Low \& P.C.Boyce [Kalimantan Barat and Kalimantan Tengah, Indonesian Borneo]; and A. hebe S.Y.Wong, S.L.Low \& P.C.Boyce [Kalimantan Utara, Indonesian Borneo]. Aridarum caulescens var. angustifolium Bogner \& Nicolson is shown to represent a further undescribed species from Sarawak, and is here published as Aridarum orestum S.Y.Wong, S.L.Low \& P.C.Boyce. Together these seven novelties take the genus Aridarum to 21 accepted, described species. An identification key to all species is provided.

}, keywords = {Araceae, Aridarum, Borneo, Indonesia, Kalimantan, Malaysia, rheophytic., Sarawak}, author = {WONG SIN YENG and LOW SHOOK LING and Peter C. Boyce} } @article {3992, title = {Studies on Homalomeneae (Araceae) of Borneo XV: A Novel Limestone-Obligated Homalomena from SW Sarawak, Malaysian Borneo}, journal = {Aroideana; Journal of the International Aroid Society}, volume = {37}, year = {2014}, pages = {43}, chapter = {38}, abstract = {

Homalomena selaburensis P.C.Boyce \& S.Y.Wong is described as a taxonomic novelty of the Homalomena Supergroup from forested Karst limestone in Samarahan Division, SW Sarawak, and compared with the most similar species described so far from Sarawak (Homalomena passa S.Y.Wong \& P.C.Boyce), and from Peninsular Malaysia (Homalomena curvata Engl.). An identification key is provided and Homalomena selaburensis is illustrated from living plants.

}, keywords = {Araceae, Borneo, Homalomena, limestone., Malaysia, Sarawak}, author = {Peter C. Boyce and WONG SIN YENG} } @article {3991, title = {Studies on Homalomeneae (Araceae) of Borneo XIV {\textendash} A New Rheophytic Species of Homalomena from Sarawak, Malaysian Borneo}, journal = {Aroideana; Journal of the International Aroid Society}, volume = {37}, year = {2014}, pages = {37}, chapter = {33}, abstract = {

Homalomena stella P.C.Boyce \& S.Y.Wong is described as a new rheophytic species and illustrated from living plants. Based on several shared morphological characteristics the possible affinity of H. stella with Homalomena havilandii Ridl. is highlighted.

}, keywords = {Araceae, Borneo, Homalomena, Malaysia, rheophytic, Sarawak}, author = {Peter C. Boyce and WONG SIN YENG} } @article {3982, title = {Studies on Schismatoglottideae (Araceae) of Borneo XVII: The Schismatoglottis Hottae Complex, a new informal taxon, and three new species from Sarawak, Malaysian Borneo}, journal = {Gardens{\textquoteright} Bulletin. Singapore}, volume = {64}, year = {2012}, pages = {269}, chapter = {257}, abstract = {

On the basis of a suite of shared morphological characters, the Schismatoglottis Hottae Complex is defined as a Borneo-endemic informal taxon in the Schismatoglottis Asperata Group. Four species, three novel, are assigned to the Hottae Complex: S. hottae Bogner \& Nicolson, S. dilecta S.Y.Wong, P.C.Boyce \& S.L.Low, sp. nov., S. mira S.Y.Wong, P.C.Boyce \& S.L.Low, sp. nov., and S. thelephora S.Y.Wong, P.C.Boyce \& S.L.Low, sp. nov. A key to species of the Hottae Complex is proffered. Schismatoglottis hottae is illustrated from the Holotype herbarium material, the three novelties from living plants.

}, keywords = {Araceae, Borneo, Sarawak, Schismatoglottis Hottae Complex, Schismattoglottis}, author = {S.Y. Wong and P.C. Boyce and S.L. Low} } @article {3516, title = {Studies on Homalomeneae (Araceae) of Borneo IX: A New Species of Homalomena Supergroup Chamaecladon from Kalimantan Timur, Indonesian Borneo}, journal = {Aroideana; Journal of the International Aroid Society}, volume = {34}, year = {2011}, pages = {36}, chapter = {30}, abstract = {

Homalomena agens is described and illustrated as a new species of the Chamaecladon Supergroup from Kalimantan Timur, Indonesian Borneo. A brief overview of the recent publication history of Hamalomena in the humid Asian tropics, together with a review of the taxonomy of the Chamaecladon Supergroup in Borneo, and a key to described species in Borneo, is provided.

}, keywords = {Araceae, Borneo, Chamaecladon Supergroup., Homalomena, Indonesia, Kalimantan}, author = {Agung Kurniawan and Ni Putu Sri Asih and Bayu Adjie and Peter C. Boyce} } @article {3403, title = {Studies on Schismatoglottideae (Araceae) of Borneo XXXIII {\textendash} A review of the Schismatoglottis Tecturata Group, including description of a new species, Schismatoglottis evelyniae}, journal = {Aroideana; Journal of the International Aroid Society}, volume = {36E}, year = {2013}, month = {12/2013}, pages = {15}, chapter = {4}, abstract = {

Schismatoglottis evelyniae P.C.Boyce \& S.Y.Wong is described as a taxonomically new species in the Tecturata Group, morphologically most similar to Schismatoglottis platystigma M.Hotta and S. petri A. Hay. Schismatoglottis evelyniae, S. platystigma, S. petri, and S. tecturata are illustrated from living plants. A key to the species of the Schismatoglottis Tecturata Group is provided.

}, keywords = {Araceae, Borneo, Malaysia, Sarawak, Schismatoglottideae, Schismatoglottis}, issn = {2310-0745}, author = {Peter C. Boyce and WONG SIN YENG} } @article {3369, title = {Studies on Schismatoglottideae (Araceae) of Borneo XXXVII {\textendash} Three enigmatic new species of Schismatoglottis from the "Heart of Borneo"}, journal = {Aroideana}, volume = {37E}, year = {2014}, pages = {28}, chapter = {17}, abstract = {

Three new species of Schismatoglottis of uncertain taxonomic affinity (S. camera-lucida P.C.Boyce \& S.Y.Wong, S. gampsospadix P.C.Boyce \& S.Y.Wong, and S. gui P.C.Boyce \& S.Y.Wong) are described and illustrated from the north western part of the \“Heart of Borneo\”.

}, keywords = {Araceae, Borneo, Indonesia, Kalimantan., Malaysia, Sarawak, Schismatoglottis}, author = {Peter C. Boyce and WONG SIN YENG} } @article {3274, title = {Studies on Schismatoglottideae (Araceae) of Borneo XXVIII {\textendash} A New Bakoa from Indonesian Borneo}, journal = {Aroideana}, volume = {36}, year = {2013}, pages = {7}, chapter = {3}, abstract = {

Bakoa sicula S.Y.Wong, is described and illustrated from Cretaceous granites of Kalimantan Barat, Indonesian Borneo. A key to the four described Bakoa species is provided.

}, keywords = {Araceae, Bakoa, Borneo, granite, Kalimantan, Schismatoglottideae}, author = {WONG SIN YENG} } @article {3273, title = {Studies on Homalomeneae (Araceae) of Borneo XIII {\textendash} New Species of Homalomena}, journal = {Aroideana; Journal of the International Aroid Society}, volume = {36}, year = {2013}, pages = {29}, chapter = {8}, abstract = {

Five new Homalomena species are described from Sarawak, Malaysian Borneo: H. baangongensis L.S.Tung \& Y.C.Hoe, H. gastrofructa S.Y.Wong, Y.C.Hoe \& P.C.Boyce, H. ibanorum S.Y.Wong \& P.C.Boyce, H. passa S.Y.Wong \& P.C.Boyce, and H. velutipedunculata S.Y.Wong, Y.C.Hoe \& P.C.Boyce. Based on morphological characteristics they are assigned to the Giamensis Complex [H. baangongensis], Hanneae Complex [H. gastrofructa, H. velutipedunculata], and Borneensis Complex [H. ibanorum] of the Cyrtocladon Supergroup, and to the Selaburensis Complex [H. passa] of the Homalomena Supergroup. Keys to informal taxa of Bornean Homalomena, and to the species of the above mentioned species complexes are provided. All described novelties are illustrated from living plants, and a comparative plate of the spadix of the five described species of the Borneensis Complex is provided.

}, keywords = {Araceae, Borneo, Homalomena, Sarawak}, author = {WONG SIN YENG and Hoe Yin Chen and Tung Lay Soon and Peter C. Boyce} } @article {2663, title = {Studies on Monstereae (Araceae) of Peninsular Malaysia 1: Rhaphidophora megasperma, a New Record for West Malaysia}, journal = {Tropical Life Sciences Research}, volume = {21}, year = {2010}, pages = {6}, chapter = {1}, abstract = {

Rhaphidophora megasperma Engl., a species hitherto regarded as endemic to Sarawak, East Malaysia, is published as a new record for Peninsular Malaysia. It is the first species in the Rhaphidophora Spathacea group recorded for western Sunda. The species is illustrated and a key to the perforate-laminated Rhaphidophora in Peninsular Malaysia is presented.

}, keywords = {Araceae, Borneo, Rhaphidophora, Sarawak}, author = {Baharuddin Sulaiman and Peter C. Boyce} } @article {2637, title = {Studies on Schismatoglottideae (Araceae) of Borneo XIV: Piptospatha marginata resurrected and observations on Piptospatha, notably for the Rejang drainages}, journal = {Webbia; Raccolta de Scritti Botanici. Florence}, volume = {66}, year = {2011}, pages = {32}, chapter = {29}, keywords = {Araceae, Borneo, Piptospatha, Rejang, Sarawak}, author = {Wong, Sin Yeng and Josef Bogner and Peter C. Boyce} } @article {2614, title = {Studies on Schismatoglottideae (Araceae) of Borneo XX: Beccari{\textquoteright}s {\guillemotleft}La Pi{\`u} piccola delle Aracee{\guillemotright}(Microcasia pygmaea) recollected and transferred to Bucephalandra Schott}, journal = {Webbia}, volume = {67}, year = {2012}, pages = {146}, chapter = {139}, abstract = {

Studi sulle Schismatoglottideae (Araceae) del Borneo XX: \«La pi\ù piccola delle Araceae\» del Beccari (Microcasia pygmaea) riscoperta e trasferita a Bucephalandra Schott \— Dopo circa 145 anni \è stata riscoperta Microcasia pygmaea Becc. Una attenta indagine rivela, contrariamente a recenti trattamenti tassonomici, che \è da ritenersi una specie distinta del genere Bucephalandra, ma tuttavia non conspecifi ca di B. motleyana Schott. Microcasia pygmaea Becc. Viene qui trasferita in Bucephalandra come B. pygmaea (Becc.) P.C. Boyce \& S.Y. Wong, comb. nov. Vengono fornite alcune note tassonomiche basate sulla morfologia. Bucephalandra \è considerato comprendere cinque specie, esposte in una nuova chiave identifi cativa. Vengono anche fornite note tassonomiche su Bucephalandra e Microcasia, e B. pygmaea viene illustrata da piante vive.

}, keywords = {Araceae, Borneo, Bucephalandra, Malaysia, Microcasia, Sarawak, Schismatoglottideae}, author = {Peter C. Boyce and Wong Sin Yeng,} }