W.J.J.O. de Wilde’s research while affiliated with Naturalis Biodiversity Center and other places

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Publications (35)


Fig. 1. Lepidagathis cephalotes (Link) Kuntze. A. Habit. B. Inflorescence with opened flower. C. Close up of flower. All from Chen SING2017-731. (Photos: L.M.J. Chen)
Fig. 2. Ruellia prostrata Poir. A. Habit. B. Close up of flower, with a green fruit on the left. All from Chen et al. LCMJ 2021-010, photographed at East Coast Park. (Photos: L.M.J. Chen)
Fig. 4. Momordica cochinchinensis (Lour.) Spreng. A. Flowering shoot and a detached flower. B. Close up of opened flower. All from Boo LCMJ 2021-041 collected from Lim Chu Kang. (Photos: W.H. Lim)
Additions to the Flora of Singapore: New and overlooked records of casual and naturalised plant species (6)
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  • Full-text available

June 2022

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661 Reads

Gardens’ Bulletin Singapore

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H J Beentje

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Nine non-indigenous casual or naturalised species are newly recorded for Singapore: Justicia pectinata L. (Acanthaceae), Lepidagathis cephalotes (Link) Kuntze (Acanthaceae), Ruellia prostrata Poir. (Acanthaceae), Acmella ciliata (Kunth) Cass. (Asteraceae), Tilesia baccata (L.) Pruski (Asteraceae), Wollastonia asperrima Decne. (Asteraceae), Merremia gemella (Burm.f.) Hallier f. (Convolvulaceae), Momordica cochinchinensis (Lour.) Spreng. (Cucurbitaceae) and Verbena brasiliensis Vell. (Verbenaceae). Descriptions, notes on the distribution, and ecology are provided for all species, while colour plates are provided for four species.

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Flora of Singapore: Checklist and bibliography

May 2022

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1,236 Reads

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11 Citations

Gardens’ Bulletin Singapore

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 each of these names. For each currently accepted name, the synonyms of relevance for Singapore are included. The native or non-native status for all taxa is given, along with the most recent national conservation assessment applied to each native taxon. If we were aware that the most recent assessment required an update, the taxon is newly assessed here. The checklist includes 2654 native taxa, 479 naturalised/casual taxa and 101 cryptogenic taxa.


Canthium obscurum W.J.de Wilde & Duyfjes, sp. nov., a new name for a widespread, wrongly interpreted species (Vanguerieae-Rubiaceae)

July 2021

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21 Reads

Blumea - Biodiversity Evolution and Biogeography of Plants

A widespread Canthium species of upland northern Thailand, Laos, and China, known erroneously as C. parvifolium (described from India) or C. horridum (described from Java) is formally described as a new species Canthium obscurum . A photograph of fruiting twigs and line drawings of the flower are added. Canthium parvifolium is lectotypified by a herbarium specimen in P.





Fig. 1. Ammannia crassicaulis Guill. & Perr. A. Plants growing along the margins of the banks of the waterway in Bishan-Ang Mo Kio Park. B. Flowers. C. Capsules. All from Chen et al. LCMJ 2018-053. (Photos: L.M.J. Chen).
Fig. 2. Securidaca philippinensis Chodat. A. Plant in Nee Soon Range (indicated by red arrow). B. Flower. C. Seedling in Sembawang forest. D. Seeds and seedling from Sembawang (Photos: H.K. Lua).
Flora of Singapore precursors, 16: New records and notes on the plant diversity of Singapore

December 2019

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348 Reads

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1 Citation

Gardens’ Bulletin Singapore

Due to ongoing work for the Flora of Singapore, a new family record for Singapore, the Stemonaceae, with one species, Stemona curtisii Hook.f., is recorded. In addition, Ammannia crassicaulis Guill. & Perr. in the Lythraceae is newly recorded as naturalising in Singapore. Notes on two rare species, Hernandia nymphaeifolia (C.Presl) Kubitzki in the Hernandiaceae and Securidaca philippinensis Chodat in the Polygalaceae, currently being revised for the Flora of Singapore are presented.


Three new species of Lythraceae and one new species of Stemonaceae described from Indochina

September 2019

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72 Reads

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4 Citations

Blumea - Biodiversity Evolution and Biogeography of Plants

Formal description of some new taxa from Indochina include in Lythraceae a new species of Lagerstroemia, L. poilanei W.J.de Wilde & Duyfjes with two varieties, var. poilanei andvar. grandis W.J.de Wilde & Duyfjes, two new species of Rotala, R. saxatilis W.J.de Wilde & Duyfjes and R. protracta W.J.de Wilde & Duyfjes and a new variety of Rotala indica , Rotala indica (Willd.) Koehne var. minima W.J.de Wilde & Duyfjes. In Stemonaceae a new species, Stemona hirtella W.J.de Wilde & Duyfjes, is described.




Citations (20)


... In contrast, L. ferruginea is nationally endangered in Singapore, and occurs in scattered small clumps in the rainforest fragments within the island state (Lindsay et al., 2022;Loo et al., 2015). The fruits are drupaceous, crimson to pink in colour when immature and ripening dark purple to black, 15-17 by 12-15 mm when fresh, with a smooth surface. ...

Reference:

Why do understorey Licuala palm fruits turn from red to white and then black when ripe?
Flora of Singapore: Checklist and bibliography

Gardens’ Bulletin Singapore

... The new records have included native plants ( De Kok, 2015;Leong-Škorničková & Boyce, 2015;Niissalo et al., 2016;Niissalo & Leong-Škorničková, 2017;J. Chen et al., 2018;Chong et al., 2018;Ho et al., 2018;Khoo et al., 2018;Lim et al., 2018a;L.M.J. Chen et al., 2019a;Van Welzen et al., 2020); introduced plants (Niissalo et al., 2016;L.M.J. Chen et al., 2018aL.M.J. Chen et al., , 2018bL.M.J. Chen et al., , 2019aL.M.J. Chen et al., , 2019b; species new to science (Niissalo et al., 2014;Leong-Škorničková & Boyce, 2015;Seah & Wong, 2018aWong, 2018;Wong & Lua, 2018;Wong & Mahyuni, 2018;Niissalo et al., 2020); and rediscoveries of species that had been considered nationally extinct Chong et al., 2018;Ho et al., 2018;Lim et al., 2018aLim et al., , 2018bRodda & Lai, 2018;Choo & Ngo, 2020). However, there have recently been only a few discoveries of native plant genera that were not previously recorded in Singapore, namely Plectocomiopsis Becc. ...

Flora of Singapore precursors, 16: New records and notes on the plant diversity of Singapore

Gardens’ Bulletin Singapore

... Alangium Lam. (in Lamarck, 1783: 174) (Cornaceae) has approximately 55 species mostly distributed in tropical and subtropical regions of eastern and southeastern Asia, extending to most of the western and southwestern Pacific Islands and eastern Australia (Feng et al., 2009;De Wilde and Duyfjes, 2016, 2017a, 2017b. The section Alangium is one of the four sections recognized in Alangium by Bloembergen (1935Bloembergen ( , 1939, his division into sections was later corroborated with molecular data (Feng et al., 2009). ...

The species of Alangium section Rhytidandra (Alangiaceae)
  • Citing Article
  • May 2017

Blumea - Biodiversity Evolution and Biogeography of Plants

... Alangium Lam. (in Lamarck, 1783: 174) (Cornaceae) has approximately 55 species mostly distributed in tropical and subtropical regions of eastern and southeastern Asia, extending to most of the western and southwestern Pacific Islands and eastern Australia (Feng et al., 2009;De Wilde and Duyfjes, 2016, 2017a, 2017b. The section Alangium is one of the four sections recognized in Alangium by Bloembergen (1935Bloembergen ( , 1939, his division into sections was later corroborated with molecular data (Feng et al., 2009). ...

Taxonomy of Alangium section Conostigma (Alangiaceae)
  • Citing Article
  • May 2017

Blumea - Biodiversity Evolution and Biogeography of Plants

... This is one of the highly demandable seasonal vegetable and medicinal plant in Asian countries [1]. This species is indigenous to India; because of its higher medicinal importance, it is demandable vegeta throughout the world [2,3]. The medicinal importance of spine gourd is sex-specific, and only female plants have medicinal values. ...

Synopsis of Momordica (Cucurbitaceae) in South East Asia and Malaysia
  • Citing Article
  • January 2002

... The male flowers of Melothria are generally in racemes, while the female flowers are either solitary or in umbels (Devi & Naidu 1984). The genus Melothria is often characterized by floral morphology, where male flowers that have two stamens which are 2-thecous, and one stamen that is 1-thecous (Simmons & Wilde 2000). ...

Zehneria subgenus Zehneria (Cucurbitaceae) in Java and Bali
  • Citing Article
  • January 2000

Blumea - Biodiversity Evolution and Biogeography of Plants

... Hodgsonia macrocarpa distributes widely from southern temperate Asia (China: Yunnan, Xizang Guangxi) to tropical Asia down to the isthmus of Kra [11,12]. It is a perennial climber reaching a size of up to 30 m and having a life span of over 70 years. ...

Taxonomy of Hodgsonia (Cucurbitaceae), with a note on the ovules and seeds
  • Citing Article
  • January 2001

Blumea - Biodiversity Evolution and Biogeography of Plants

... For example, Williams (1904Williams ( -1905 included just c. 100 orchid species in his "Liste des Plantes Connues du Siam". Arthur F. G. Kerr, who lived in Thailand from 1902 to 1932, made more than 2000 orchid collections (Parnell et al. 2015), but published very little on the orchid flora (Jacobs 1962). Indeed, the book of Seidenfaden & Smitinand (1959-1965 marked the beginning of serious exploration of the Thai orchid flora (documenting 771 identified and 87 unidentified species), and Seidenfaden's later revision increased the number of known species to c. 1200. ...

A re-examination of the life and work of A.F.G. Kerr and of his colleagues and friends

... Chi Bằng lăng Lagerstromeia L. (thuộc họ Bằng lăng Lythraceae) là dạng cây gỗ hoặc cây bụi, cụm hoa hình chùy, đài hoa hình chuông hoặc ống, thùy đài và tràng hoa 6-9, quả hóa gỗ, hạt có cánh. Chi bao gồm khoảng 60 loài và phân bố chủ yếu ở các khu vực nhiệt đới và cận nhiệt đới đất thấp từ Ấn Độ đến Trung Quốc, khu vực Malaysia và mở rộng đến bắc Úc [2][3][4]. Ở Việt Nam, chi Bằng lăng đã ghi nhận khoảng 20 loài, phân bố chủ yếu ở các tỉnh phía Nam với khí hậu nhiệt đới điển hình [5]. Chi Bằng lăng được nhiều người biết đến vì có một số loài được trồng làm cảnh trong vườn và ven đường. ...

I>Lagerstroemia ( Lythraceae ) in Malesia
  • Citing Article
  • December 2014

Blumea - Biodiversity Evolution and Biogeography of Plants

... Hence the conserved type was collected by König after the death of Linnaeus and cannot be part of the same gathering that was sent to Linnaeus. Wilde & duyfjes's (2014Wilde & duyfjes's ( , 2016 quotation of isotypes in "C, LINN 156.5" is consequently untenable, at least for the sheet at LINN. The referred sheet at C (C10023414, ex Koenig Herbarium ex Hb. rottböll) is annotated by rottbøll with "ex India orientali", "ammannia 8andra", "Jussiaea. ...

Ammannia (Lythraceae) in Malesia
  • Citing Article
  • September 2014

Blumea - Biodiversity Evolution and Biogeography of Plants