[Botany • 2019] Pinanga schwanerensis (Arecaceae) • A New Species of Palm from Kalimantan, Indonesia

Pinanga schwanerensis A.Randi, Hikmat & Heatubun

in Randi, Hikmat & Heatubun, 2019. 

 DOI: 10.11646/phytotaxa.402.2.6

Abstract 

A new species of palm, Pinanga schwanerensis, is described and illustrated here. This is the third species of Pinanga to have been described from Kalimantan since the description of P. salicifolia Blume and P. albescens Becc. A discussion of its morphological characters, distribution, ecology, habitat and conservation status is provided. 

Keywords: Arecaceae, palms, Pinanga, Kalimantan, taxonomy

Figure 2. Pinanga schwanerensis.
 A. Clustering habit. B. Irregular divided leaf blade, upper surface. C. Undivided young leaf blade, below surface. D. Stem and crownshaft. E-F. Interfoliar inflorescence with persistent prophyll. G. Staminate flower. H-I. Mature fruit, epicarp and mesocarp. J. Endocarp and seed.

 Scale bar : A = 60 cm; B-C = 10 cm; D = 30 cm; E = 3 cm; F = 5 cm; 

G = 9 mm; H-J = 17 mm. All photos by A. Randi.

Pinanga schwanerensis A.Randi, Hikmat & Heatubun, sp. nov. 

Diagnosis:— This taxon is similar to Pinanga jambusana C.K.Lim in general habit and inflorescence appearance, but can be distinguished by a combination of the following characters: the leaf pinnate or divided irregularly into 2–3 leaflets each side, rarely entire, with petiole to 120 cm long, ligule present; inflorescence interfoliar, bursting out among marcescent leaf sheaths; prophyll leathery and persistent; stamens 15–18; fruits broadly ellipsoid, colored dull white with dark purple at the tip and turning dark purple entirely when mature.

Distribution:— Pinanga schwanerensis is known only from the Schwaner mountains, which include the Bukit Baka Bukit Raya National Park at the border of West and Central Kalimantan of Indonesia. It has been recorded from five localities so far, two localities from West and three from the Central Kalimantan (Figure 1).

 Habitat:— Pinanga schwanerensis grows in primary lowland Dipterocarp forest, on undulating land and slopes at an elevation of 150–550 m asl. It seems to prefer humid areas covered by dense forest canopy in narrow valleys and/or at the side of small rivers between ridges, usually growing on soil with a thick litter layer. 

 Etymology:— From Schwaner Mountain in the border of West and Central Kalimantan, Indonesia.  

Agusti Randi, Agus Hikmat and Charlie D. Heatubun. 2019. Pinanga schwanerensis, A New Species of Pinanga (Arecaceae) from Kalimantan, Indonesia. Phytotaxa. 402(2); 121–125. DOI: 10.11646/phytotaxa.402.2.6

[Botany • 2016] Areca jokowi • A New Species of Betel Nut Palm (Arecaceae) from Western New Guinea

Areca jokowi Heatubun

‘Pinang Jokowi’  |  DOI:  10.11646/phytotaxa.288.2.8 

Abstract

A new species of betel nut palm, Areca jokowi, is described and illustrated here. This is the third species of Areca to have been described recently from New Guinea that is closely related to the widespread, economically important species A. catechu, the cultivated betel nut palm. A discussion of its morphological characters, distribution, ecology, habitat, uses and conservation status is provided, as well as a new identification key for western New Guinean Areca.

Key words: Arecaceae, Palmae, palms, New Guinea, taxonomy

Taxonomic Treatment 

Areca jokowi Heatubun, sp. nov. 

Type:— CULTIVATED. Indonesia, West Papua Province. Kaimana Regency, Yamor District, Yamor Lake, Gariau (Urubika) village, 106 m elev., 06 June 2015, Heatubun et al. 1252 (holotype MAN!, isotype BO!, K!) 

FIGURE 2. Areca jokowi Heatubun.
A. Slender habit with irregular crown shape. B. Leaf and inflorescence held by Christian Anggua for scale. C. Inflorescence-a strongly divaricate panicle with crowded rachillae. D. Pistillate flowers, striking in their white colour. E. Close up of pistillate flower at anthesis showing stigma. F. Young fruit in section. 

A–E photos were taken from the holotype specimen (Heatubun et al. 1252), F from voucher collected by Ekspedisi NKRI Koridor Papua Barat 2016. Photos: A, F (Lt. Ardiansyah), B–E (Charlie D. Heatubun). 

DOI:  10.11646/phytotaxa.288.2.8 

Diagnosis:— This new species is similar to Areca catechu L., Areca mandacanii Heatubun and Areca unipa Heatubun in habit and inflorescence structure, but differs by the inflorescence branched to four orders, the rachillae crowded, borne very close together and not expanding widely, sinuous especially in the distal two thirds, the floral clusters uniseriate in arrangement (although distichous near the tip of the rachilla), complete floral triads (comprising two staminate and one pistillate flower) always solitary at the base of rachillae, but absent from many rachillae, the remaining floral clusters consisting of dyads of staminate flowers, or solitary staminate flowers near the rachilla tip, and the pistillate flowers with striking white calyx at anthesis. Solitary, slender palm to 15 m. Stem 7–8 cm diam.; internodes 30–34 cm. Leaves 9 in 

Distribution:— Known only from two individuals palms cultivated in Gariau (Urubika) village, on the SW shore of Yamor Lake in Yamor District, Kaimana Regency, West Papua Province, Indonesia. These palm were grown from the seeds brought from hill forest at Kepala Air Kali Ima (headwaters of Ima river) in Gunung Daweri (Mt. Daweri), near Kewo village on the border of Nabire Regency of Papua Province.

 Habitat:— Based on information gathered from the person who brought the seeds and planted this betel nut palm, the species grows in hill forest at an elevation of about 300 m altitude on soils derived from sandstones.

 Local names:— Siaku’ (Yamor dialect, Kamoro language).

 Uses:— The fruits are chewed as a betel nut substitute. However, the palm has potential as an ornamental.

Etymology:— The specific epithet refers to the acronym the President of Republic Indonesia, His Excellency Joko Widodo-Jokowi. This new species is dedicated to Mr. Joko Widodo for his exemplary leadership, his simplicity, and more importantly for his concern for the development of Tanah Papua (the Indonesian Provinces of Papua and West Papua). The common name “Pinang Jokowi” is suggested here.

  Charlie D. Heatubun. 2016. Areca jokowi: A New Species of Betel Nut Palm (Arecaceae) from Western New Guinea.  Phytotaxa. 288(2); 175-180. DOI:  10.11646/phytotaxa.288.2.8

[Botany • 2014] Jailoloa halmaherensis, Manjekia maturbongsii & Wallaceodoxa raja-ampat • Three New Genera of Arecoid Palm (Arecaceae) from eastern Malesia

Fig. 7. Wallaceodoxa raja-ampat Heatubun & W. J. Baker.
A crown; B inflorescence, inset showing congested floral triads; C indumentum on petiole base; D close-up of indumentum; E fruit; F endocarp.

Photos: C.D. Heatubun |  DOI: 10.1007/S12225-014-9525-X

ABSTRACT

 Recent botanical exploration in eastern Malesia has resulted in the discovery of three spectacular palm taxa that have proved difficult to assign to genus. New evidence from molecular phylogenetic research indicates that these taxa should now be recognised as three monotypic genera. Here, we describe these genera as new to science, all of which are members of subtribe Ptychospermatinae (Areceae: Arecoideae). Jailoloa Heatubun & W. J. Baker is restricted to ultramafic vegetation in a single site in Halmahera and is Critically Endangered due to nickel mining. Manjekia W. J. Baker & Heatubun is scattered throughout the limestone vegetation of Biak Island, east of the Bird's Head Peninsula of New Guinea, and is Endangered, although parts of its distribution fall within a protected area. Wallaceodoxa Heatubun & W. J. Baker, named to mark the centenary of Alfred Russel Wallace's death, is found on Gag and Waigeo, two of the Raja Ampat Islands west of the Bird's Head Peninsula, where it is Critically Endangered due to its small and rapidly reducing population. Full morphological descriptions are provided with detailed comparisons with related genera, alongside a revised key to the genera of Ptychos-permatinae. These new genera are unexpected additions to the palm flora of Malesia, and demand urgent conservation attention.

Keywords: Biodiversity, Eastern Indonesia, Maluku, Moluccas, New Guinea, Palmae

Jailoloa halmaherensis (Heatubun) Heatubun & W. J. Baker

Manjekia maturbongsii (W. J. Baker & Heatubun) W. J. Baker & Heatubun

Wallaceodoxa Heatubun & W. J. Baker
Wallaceodoxa raja-ampat Heatubun & W. J. Baker sp. nov. 

named to mark the centenary of Alfred Russel Wallace's death, is found on Gag and Waigeo, two of the Raja Ampat Islands west of the Bird's Head Peninsula, where it is Critically Endangered due to its small and rapidly reducing population. 

Type: Indonesia, Raja Ampat Islands Regency, Waigeo Island, Waisai, Kelurahan Warmasen, behind Kantor Bupati, forest on right side of road to Pari Convention Centre Building (tanjakan gedung Pari), 15 April 2011, Heatubun et al. 1126 (holotype MAN!; isotypes BO!, K!).

ETYMOLOGY. The generic name commemorates Alfred Russel Wallace, the great English naturalist and codiscoverer of the theory of evolution by natural selection, who visited Waigeo in the Raja Ampat Islands in 1860 during his celebrated Malay Archipelago travels (Wallace 1869; van Wyhe 2013). This eponymy marks the centenary of his death on 7 November 1913. The generic name is derived by suffixing Wallace’s surname with the Greek word (-doxa) to mean “to the glory of Wallace”

Charlie D. Heatubun, Scott Zona and William J. Baker. 2014.  Three New Genera of Arecoid Palm (Arecaceae) from eastern Malesia.
 Kew Bulletin. 69(3):9525. DOI: 10.1007/S12225-014-9525-X

ResearchGate.net/publication/264976063_Three_new_genera_of_arecoid_palm_(Arecaceae)_from_eastern_Malesia

http://www.kew.org/discover/blogs/kew-science/discovering-plant-diversity-%E2%80%93-are-we-speed

http://www.palmtalk.org/forum/index.php?/topic/43125-palm-taxonomy-update-1-new-species-3-new-genera-adonidia-monotypic-again/

Charlie D. Heatubun. 2011. A New Species of Ptychosperma from Halmahera, North Moluccas . Palms. 55(4); 183–189. https://www.palms.org/palmsjournal/2011/vol55n4p183-189.pdf

[Botany • 2015] Begonia yapenensis • A New Species (sect. Symbegonia, Begoniaceae) from Papua, Indonesia

Fig. 1. Begonia yapenensis M.Hughes sp. nov. (sect. Symbegonia, Begoniaceae), 

cultivated specimen at the Royal Botanic Garden Edinburgh, accession 20090830. 

A. Whole plant showing spreading habit (scale bar = 5 cm). B. Female fl ower and ovary (left, corolla dissected; right, corolla entire) (scale bar = 1 cm). C. Cross section of ovary showing three locules with bilamellate placentae (scale bar = 1 cm). D. Stigmas (scale bar = 5 mm). E. Male fl ower (bottom, corolla dissected; upper, corolla entire; scale bar = 10 cm).

DOI: dx.doi.org/10.5852/ejt.2015.119

ABSTRACT

 A new species, Begonia yapenensis M.Hughes, in Begonia section Symbegonia (Begoniaceae) is described and diagnosed against Begonia sympapuana. The new species is endemic to Yapen Island, Papua, Indonesia, and is currently known from a single collection.

Mark Hughes, Sadie Barber, Charlie D Heatubun and Janet Gagul. 2015. Begonia yapenensis (sect. Symbegonia, Begoniaceae), A New Species from Papua, Indonesia. European Journal of Taxonomy. 119:1-6.
DOI: dx.doi.org/10.5852/ejt.2015.119

ResearchGate.net/publication/274953476_Begonia_yapenensis_(sect._Symbegonia_Begoniaceae)_a_new_species_from_Papua_Indonesia