Peter Boyce

University of Florence - Centro Studi Erbario Tropicale

Angiosperms are the cornerstone of most terrestrial ecosystems and human livelihoods1,2. A robust understanding of angiosperm evolution is required to explain their rise to ecological dominance. So far, the angiosperm tree of life has been determined primarily by means of analyses of the plastid genome3,4. Many studies have drawn on this foundation...

Changes to the taxonomy of Apoballis mutata (Hook.f.) S.Y.Wong & P.C.Boyce are presented. Two species of Schismatoglottis hitherto treated as synonymous with A. mutata [S. linguiformis Engl. and S. ridleyana Engl.] are resurrected, transferred to Apoballis as new combinations, and illustrated from their nomenclatural types. Apoballis ridleyana is a...

Two new species of Burttianthus are described from Sarawak: B. rejangicus from the Rejang and Balleh rivers of the western Rejang Basin, and B. solus from the Similajau Basin, Bintulu. Both novelties are illustrated from living plants and the spa-dices of eight of the nine Burttianthus species are compared in accompanying figures.

Josefia intricata is described as a new genus and species of Araceae (Schismatoglottideae) from Kalimantan Tengah, Indonesian Borneo, compared with the most similar genera, Burttianthus and Pursegloveia, and illustrated from living plants.

Schismatoglottis variegata Hook. ex Veitch is conspecific with and antedates Colobogynium tecturatum Schott [Schismatoglottis tecturata (Schott) Engl.]. It is here transferred to Colobogynium Schott as C. variegatum (Hook. ex Veitch)

A new species of Homalomena Chamaecladon Clade is described from the Bengoh Range, Kuching Division, Sarawak, and compared with the two most similar described species from Kuching: H. paucinervia from the Matang Massif, and H. santubongensis from Gunung Santubong. The three species are illustrated from living plants and differentiated in an identif...

Homalomena latisinus is described and illustrated as a new Bruneian species of the Homalomena Borneensis Complex from shaded damp kerangas. It is compared with the five species previously described for the complex.

Homalomena atlas is described and illustrated as a new species from the western Rejang Basin and assigned to the Hanneae Complex of the Cyrtocladon Clade, taking the complex to 12 described species on Borneo.

The long-misinterpreted Arum montanum Roxb. is shown to be a species of Englerarum Nauheimer & P.C.Boyce (Araceae–Aroideae). It is proposed that its originally stated Indian provenance is a mistake and that it more likely came from Myanmar, from where Englerarum is newly recorded here. The frequently misapplied name Alocasia gageana Engl. & K.Kraus...

Two new species of Rhaphidophora with perforated leaf blades are described from Borneo and illustrated from living plants. An identification key to the five morphologically similar Bornean species is provided.

Corrections and updates are made to the taxonomy and nomenclature of Homalomena ovata Engl., Homalomena borneensis Ridl, and Chamaeclason ovatum Schott. Homalomena hostifolia Engl. is treated as a homotypic superfluous name for H. ovata Engl. Homalomena ovatum (Schott) Hook.f., an illegitimate name, is renamed Homalomena nathanielii and treated as...

A checklist of all species of bryophytes, lycophytes, ferns, gymnosperms and angiosperms that are found in the wild (native, naturalised and casual) in Singapore is presented. We have attempted to account for all names of species and infraspecific taxa that have ever been recorded for Singapore, along with the pertinent publications that reported e...

A checklist of all species of bryophytes, lycophytes, ferns, gymnosperms and angiosperms that are found in the wild (native, naturalised and casual) in Singapore is presented. We have attempted to account for all names of species and infraspecific taxa that have ever been recorded for Singapore, along with the pertinent publications that reported e...

Schottarum inconspicuum S.Y.Wong & P.C.Boyce, is described as a new species from the easten part of the Rejang Basin, taking the genus to three species. All are illustrated from living plants. A distribution map is provided.

Schismatoglottis auyongii is described and illustrated as a new clumping species of the Schismatoglottis Calyptrata clade from wet slopes in hill forest on the extremely hard Paleogene sandstones of the Penrissen Range, SW Sarawak.

Two ornamental new species of Schismatoglottis are described and illustrated from Borneo. Schismatoglottis metallica from Kalimantan Barat, Indonesian Borneo, assigned to the Schismatoglottis Multinerva clade, and S. reticosa from the upper Engkari river in SW Sarawak, Malaysian Borneo, provisionally placed in the Petradoxa clade. Recognition of th...

Bucephalandra adei S.Y.Wong, P.C.Boyce & A.Y.M.Hii, is described as new additional the six already known species in which the spadix appendix exceeds the length of the fertile portion of the spadix. All are endemic to Borneo. An key to identification for the seven species and a distribution map is provided. Recognition of B. adei takes Bucephalandr...

The new combination Pothos venustus (Wall. ex C.DC.) A.Hay & P.C.Boyce is made, based on a juvenile phase specimen collected in Singapore in 1822 by Nathaniel Wallich and first named in the family Piperaceae. Pothos venustus has priority over P. curtisii Hook.f., a species from Peninsular Thailand, Peninsular Malaysia, Singapore, and Sumatera. Poth...

Three new colonial species of Schismatoglottis Calyptrata clade are described and illustrated from Sarawak and compared with the four pre-existing morphologically similar species occurring in the state. A modified description of Schismatoglottis niahensis is provided to correct a previous misinterpretation of the stem architecture. All seven recogn...

Three new colonial species of Schismatoglottis Calyptrata clade are described from Peninsular Malaysia and compared with the four already known morphologically similar species described from there. All seven species are illustrated from living plants and an identification key is provided.

Homalomena puncticulosa is described and illustrated as a new species of the Chamaecladon Clade known from a single population in Selangor, and compared with the superficially similar H. kiahii Furtado, and other similar Sumateran species.

Araceae is recognized as keladi hutan or ubi keladi to the local community in Malaysia. The aim of this study is to provide an update checklist and description on ecology of Araceae in Lojing Highlands, Gua Musang, Kelantan, Peninsular Malaysia. The survey was applied the random sampling technique. The result shows that a total of 25 species from 1...

Two new Hanguana species from Kalimantan, Indonesian Borneo, are described here. Hanguana karimatae from Karimata Island, West Kalimantan province, is characterised by a stout habit, prominently oblique yellow fruits with raised stigma and 1- or 2-seeded fruits. Hanguana nana from Central Kalimantan province is the smallest species in the genus wit...

A new species of Homalomena Chamaecladon Clade is described from the Santubong Peninsula, Kuching Division, Sarawak, to where it is endemic, and compared with H. paucinervia from the nearby Matang Massif, and with H. atrox from Sri Aman, the two other most similar described species from NW Borneo. All three species are illustrated from living plant...

Homalomena joanneae is described and illustrated as a new species of the Chamaecladon Clade restricted to the industrially threatened limestone of Gunung Kanthan, Kuala Kangsar, Perak, and compared with its probable nearest congener, H. hendersonii from Kelantan.

Homalomena portae-inferni is described and illustrated as a new species of the Chamae-cladon Clade with scintillating-velutinous foliage restricted to lowland kerangas, and compared with the three morphologically most similar species on Borneo, and with the single other Chamaecladon species described from the Tawau Hills National Park.

Schismatoglottis guabatuensis is described and illustrated as a new species of the Calyptrata clade restricted to the limestone of Batu Caves, Selangor, Malaysia. It is compared with the three other described species of the Calyptrata clade present in Peninsula Malaysia.

Homalomena hottae is described and illustrated as a new species of microscopically scintillating-velutinous leaved aroid from the Karst limestone of Mulu National Park, to where it is locally restricted. Homalomena hottae is compared with the two currently described Bornean species with similarly scintillating foliage. Notes on the pollination biol...

Homalomena benedikii is described and illustrated as a new species from Serian Division, SW Sarawak, where it is restricted to forested Triassic-Jurassic karst formations, and compared with the two most similar described species H. cowleyae and H. imitator, from shales in NE Sarawak and Brunei, and C Sarawak, respectively.

Citation: Wong Sin Yeng et al. (2020) Studies on Potheae of Borneo II: Pedicellarum M.Hotta subsumed into Pothos L., and recognition of three new species. Abstract. Pedicellarum is subsumed into Pothos as Pothos paiei. Four species, three tax-onomically novel (Pothos degenerans, ecclesiae and P. fractiflexus) and one pre-existing (Pothos oliganthus...

The presence of stipular and leaf blade extra floral nectaries and associated ant activity, including brood raising within stipules, is reported for saplings of Shorea macrophylla [sect. Pachycarpae] in Kuching Division, Sarawak.

Citation: Wong Sin Yeng et al. (2020) Studies on Homalomeneae (Araceae) of Sumatera VI: Two remarkable new species of Homalomena [Chamaecla-don Clade]. Abstract. Two ornamental new species of Sumateran Homalomena [Chamaecladon] are described: Homalomena anthurioides These novelties represent a continuation of discoveries on Sumatera of species with...

Alocasia puncakborneensis is described and illustrated as a new species of the Alocasia Princeps Complex from upper hill forest on the extremely hard Paleogene sandstones of the Penrissen range, SW Sarawak. Alocasia puncakborneensis occurs at the highest altitude of any of the locally-restricted /geologically obligated species yet described for the...

Schismatoglottis imbakensis is described as a new species of the Schismatoglottis Patentinervia Clade from forested ultramafic rocks, and compared with S. retinervia Furtado, the only the species for the clade yet described from Sabah.

Homalomena cataractae is described and illustrated as a new species of Steenisian rheophyte belonging to the Homalomena punctulata ‐clade from the Tau range, Central Sarawak. A key to the species of the Homalomena punctulata ‐clade is provided.

Current and predicated totals of taxa for Araceae worldwide.

Rhaphidophora neglecta is described, illustrated, and distinguished from R. decursiva with which it has been confused. Attention is drawn in particular to its remarkable and unique (in Monsteroideae) leaflets inserted on pulvini on the rhachis, with no lamina decurrency. It is so far known only from cultivation in the Royal Botanic Gardens Sydney w...

Four new species of Schismatoglottis are described and illustrated from Mulu National Park in Malaysian Borneo: Schismatoglottis fossae (Patentinervia Clade), S. roseopedes and S. serratodentata (Calyptrata Clade) and S. pellucida (currently unplaced but likely in the Multinervia clade). A brief summary is provided of botanical exploration at Mulu,...

Schismatoglottis porpax S.Y. Wong, Kartini & P.C. Boyce (Araceae) is described as a new species of the Schismatoglottis Multinervia Complex and compared with congenious species, notably with the morphologically closest taxon S. hayi. Schismatoglottis porpax raises the number of species in the Multinervia Complex to five, and furthermore represents...

Anadendrum chlorospathum is described as a new species from Central Vietnam, unique in the genus by a glossy medium green spathe, flowers in which the perigone is shorter than the gynoecium, and having anthers longer at anthesis than the filaments.

Homalomena kionsomensis Kartini, P.C. Boyce & S.Y.Wong is described and illustrated as a new species of the Chamaecladon clade, and compared with the one other species of the clade so far described from Sabah. Recognition of H. kionsomensis takes the Homalomena flora of Sabah to seven species, five of them described within the last decade. A key to...

Schismatoglottis clivemarshii and Schismatoglottis priapica are described and illustrated as new species from the Danum Valley Conservation Area, Tawau, Lahad Datu, Sabah, to where both are endemic.

Pothos pugnax is described and illustrated as a new species [Allopothos supergroup: Pothos barberianus group] from ridgetop kerangas in Kuching Division, Sarawak, Malaysian Borneo. Comparison is made with Pothos atropurpurascens the only closely similar species occurring on Borneo, and also between the confoundable shingling stages of P. pugnax and...

Shorea peltata (Dipterocarpaceae), categorized according to IUCN classification as Critically Endangered, is reported for the first time from Sarawak, NW Malaysian Borneo. New data on its distribution, locations' geological characteristics, and the first published description of shoot innovations are presented. Plants from ultrabasics in NE Sabah w...

Shorea peltata, IUCN categorized as Critically Endangered, is reported for the first time from Sarawak, NW Malaysian Borneo. New data on species’ distribution, geological occurrences, and the first published description of shoot innovations are presented. Plants from ultrabasics in NE Sabah are excluded from S. peltata as an undescribed novelty for...

A total of 14 species from 8 genera of Araceae was recorded from Pulau Pangkor. This represents about 10% out of an estimated 140 species and 28.6% of the 28 genera of Araceae reported for Peninsular Malaysia. This includes a species recently found in Peninsular Malaysia, Aglaonema pumilum Hook.f. The most noticeable species is Aglaonema nitidum (J...

Bucephalandra danumensis is described from the Danum Valley Conservation Area, Tawau, Lahad Datu, Sabah, where it is restricted to streams and waterfalls on igneous outcrops in forests on Cretaceous deepwater sediments, and compared with the only other Sabahan Bucephalandra species, and with all species with echinate/papillate spadix appendix stami...

Wong S.Y., Aisahtul binti Wardi & Boyce, P.C. Studies on Schismatoglottideae (Araceae) of Borneo LXIV: Another new species for the Schismatoglottis Patentinervia Clade from the Rejang Basin, Sarawak. Aroideana 41(1): 139-148 2018

Peter Boyce and Tom Croat have been maintaining a list of the currently valid genera, their species numbers and distribution. We are pleased to be the official repository of that list in PDF form: "The Überlist of Araceae, Totals for Published and Estimated Number of Species in Aroid Genera", most recently updated !!FEB2018.

Phylogenetic relationships within Araceae tribe Schismatoglottideae are elucidated based on nuclear ITS and plastid matK. Thirty genera are recognised, composed of 13 pre-existing genera (Apoballis, Aridarum, Bakoa, Bucephalandra, Fenestratarum, Galantharum, Ooia, Phymatarum, Pichinia, Piptospatha, Schismatoglottis, Schottariella and Schottarum), f...

Aridarum chamaesyce S.Y Wong & P.C. Boyce, sp. nov. is described based on collections from north western Borneo hitherto incorrectly determined as Aridarum montanum. An updated description for A. montanum is given, and both Aridarum chamaesyce and A. montanum are illustrated from living plants. A key to the four species of the Aridarum Clade is off...

Homalomena electra P. C. Boyce & S. Y. Wong, a new species of Homalomena [Cyrtocladon Clade] Hanneae Complex, is described from Kelantan, Peninsular Malaysia as the first representative of the Hanneae Complex from beyond Borneo. A key to the three described Peninsular Malaysian species of Homalomena Cyrtocladon Clade is presented, and all three are...

Schismatoglottis hendrikii S. Y. Wong & P. C. Boyce, sp. nov. is described and illustrated as a new species of the Schismatoglottis Nervosa Grade, based on three collections from Kalimantan Barat, Indonesian Borneo. The four described species for the Nervosa Grade with a green spathe hardly opening at anthesis are pictorially compared.

Homalomena niahensis P.C. Boyce, is described and illustrated as a new species of Homalomena [Homalomena Clade] locally endemic to Niah Caves, Sarawak, Malaysian Borneo, where it is obligated to Karst limestone. Homalomena niahensis is the sixth species to be described for the Homalomena Selaburensis Complex to which its nearest congener is Homalom...

Three new species of the Schismatoglottis Patentinervia Clade are described and illustrated from Sarawak, Malaysian Borneo, and included in an updated identification key to the described species in clade. Two of the novelties are from Serian Division, SW Sarawak: Schismatoglottis pichinensis P.C. Boyce sp. nov., restricted to forested limestone at...

Schismatoglottis saafiei Kartini, P. C. Boyce & S. Y. Wong and Schismatoglottis zainuddinii Kartini, P. C. Boyce & S. Y. Wong are described and illustrated as new species from Tawau Hills N.P., Sabah, Malaysian Borneo. Schismatoglottis zainuddinii is the first record of the Schismatoglottis Asperata clade for Sabah. Schismatoglottis saafiei belongs...

Homalomena lambirensis S. Y. Wong & P. C. Boyce is described and illustrated as a new species of the Homalomena Hanneae complex [Cyrtocladon clade] from Lambir Hills National Park, northeast Sarawak, Malaysian Borneo to where it is endemic. Comparison with the described Bornean species of the Hanneae complex is made and an identification key to spe...

Rhaphidophora sonlaensis V.D. Nguyen and P.C. Boyce, a new species of Araceae, is described and illustrated from the material collected in Muong La District, Son La Province, Vietnam, and compared with the two species it most closely resembles, R. laichauensis and R. crassicaulis.

Vietnamocasia, a new monotypic aroid genus in the Alocasia-Colocasia clade, is described with the type species, Vietnamo-casia dauae. Vietnamocasia is distinguished by possessing free individual staminate flowers, lacking expanded syncon-nectives, and having nodding inflorescences. Vegetatively Vietnamocasia is reminiscent of species of the distant...

Vietnamocasia, a new monotypic aroid genus in the Alocasia-Colocasia clade, is described with the type species, Vietnamo-casia dauae. Vietnamocasia is distinguished by possessing free individual staminate flowers, lacking expanded syncon-nectives, and having nodding inflorescences. Vegetatively Vietnamocasia is reminiscent of species of the distant...

Bakoa lucens (Bogner) P.C.Boyce & S.Y.Wong, Bot. Stud. (Taipei) 49(4): 399. 2008.

Alocasia farisii Zulhazman, Norzielawati & P. C. Boyce is described and illustrated from Karst limestone in Kelantan as the first recorded Peninsular Malaysian species of the hitherto wholly Bornean Alocasia princeps complex, within which A. farisii most closely resembles the southwest Sarawak limestone-obligated Alocasia reversa N. E. Br.

Pothos vietnamensis V. D. Nguyen & P. C. Boyce is described and illustrated from northern Vietnam as a new species of the Pothos supergroup, and it is compared with the two most similar species: P. kerrii and P. pilulifer to which P. vietnamensis is comparable by having a very small fertile portion (< 5 mm diameter) on the spadix. Ecology, habitat,...

Schismatoglottis lowae S. Y. Wong & P. C. Boyce sp. nov. is described and illustrated based on the type of Schismatoglottis wallichii var. oblongata Hook.f., until now treated as a heterotypic synonym of S. wallichii Hook.f. A key to the three accepted species of hapaxanthic-stemmed (Calyptrata Clade) Schismatoglottis in Peninsular Malaysia is prov...

Bakoa lucens (Bogner) P.C.Boyce & S.Y.Wong, Bot. Stud. (Taipei) 49(4): 399. 2008

Bakoa lucens (Bogner) P.C.Boyce & S.Y.Wong, Bot. Stud. (Taipei) 49(4): 399. 2008.

Bakoa lucens (Bogner) P.C.Boyce & S.Y.Wong, Bot. Stud. (Taipei) 49(4): 399. 2008.

Bucephalandra vespula S.Y.Wong & P.C.Boyce, Willdenowia 44: 190. 2014.

Bucephalandra vespula S.Y.Wong & P.C.Boyce, Willdenowia 44: 190. 2014.

Bucephalandra vespula S.Y.Wong & P.C.Boyce, Willdenowia 44: 190. 2014.

Hottarum lucens - J.Bogner 1439 [K] - ISOTYPE - [= Bakoa lucens]

Schottarum sarikeense (Bogner & M.Hotta) P.C.Boyce & S.Y.Wong, Bot. Stud. (Taipei) 49(4): 395. 2008.

Hottarum sarikeense - J.Bogner 1553 [K] - ISOTYPE [= Schottarum sarikeense]

Hottarum sarikeense - J.Bogner 1553 [US] - ISOTYPE [= Schottarum sarikeense]

Bucephalandra motleyana Schott - J.Motley 404 [K] - HOLOTYPE

Bucephalandra motleyana Schott - J.Motley 404 [K] - HOLOTYPE

Bucephalandra ultramafica S.Y.Wong & P.C.Boyce

Bucephalandra muluensis (M.Hotta) S.Y.Wong & P.C.Boyce

Bucephalandra chrysokoupa S.Y.Wong & P.C.Boyce

A. Plants in habitat. B & C. Detail of mature inflorescence at onset of pistillate anthesis. D. Inflorescence at pistilate anthesis, nearside part of spathe limb artificially removed. E. Detail of staminate flower zone showing the greatly extended connective. The top-most few flowers are sterile.

a new species of Hanguana (hanguanaceae), H. thailandica, is described and illustrated from Trang province, Peninsular Thailand. This is the second Hanguana species recorded in Thailand, along with the widespread helophytic H. malayana. The species is morphologically similar to Hanguana exultans and H. nitens found in swamp forests habitats in sout...

Diagnosis — Schismatoglottis amosyui resembles S. liniae S. Y. Wong, S. matangensis S. Y. Wong, S. nervosa Ridl., S. simonii S. Y. Wong and S. turbata S. Y. Wong by the strongly aromatic vegetative tissues, erect stems, and cordate-elliptic leaves with conspicuous tessellate secondary venation, but differs by the spathe limb remaining green through...

Homalomena squamis-draconis, a highly ornamental new dwarf species of Chamaecladon clade, is described and illustrated from Sumatera.

Three new species of Homalomena (Chamaecladon clade) are described and illustrated from Sumatera (Sumatra), Indonesia:

Rhaphidophora bogneri P. C. Boyce & Haigh is described as a new species from Gabon, equatorial West Africa, defined by inflorescences pendent during anthesis and fruiting. Rhaphidophora is additionally reviewed for Africa and three described species are accepted, of which R. africana N.E. Br. is considered undoubtedly polyphyletic, likely encompass...

The little-known and small genus Anaphyllum (Araceae), represented by only two species endemic to India, namely A. beddomei and A. wightii, has remained without correctly designated types. Their syntypes are recognized and the names are here typified. The correct bibliographic reference to the protologue of A. wightii is provided for the first time...