A monograph of the Hydriastele wendlandiana group (Arecaceae: Hydriastele)

Abstract

Summary.A taxonomic revision is presented of the Hydriastele wendlandiana group, a well-defined species grouping within the Indo-Pacific palm genus Hydriastele that occurs in New Guinea, the Bismarck Archipelago and northern Australia. We accept five species: Hydriastele kasesa, H. rheophytica, H. variabilis, H. wendlandiana and H. apetiolata sp. nov. and provide fundamental information about each of those taxa including a summary of the group's taxonomic history and phylogeny, a distribution map, a key to the species, species descriptions with scientific illustrations, and IUCN Red List assessments.

PalmTraits 1.0, a species-level functional trait database of palms worldwide

“…Additionally, we went through taxonomic revisions, monographs and other publications that provided trait data for specific taxonomic groups such as palm genera or tribes (e.g. Acrocomia 77 , Aiphanes 78 , Archontophoenix 79 , Areca 80 , Asterogyne 81 , Astrocaryum 82,83 , Attalea 84 , Bactris 85,86 , Balaka 87 , Borassodendron 88 , Butia 89 , Calyptrocalyx 90 , Calyptrogyne 91 , Calamus 92–94 , Caryota 95,96 , Chamaedorea 97–103 , Cyrtostachys 104 , Drymophloeus 105 , Eremospatha 55,106 , Geonoma 107 , Heterospathe 108 , Hydriastele 109,110 , Hyospathe 111 , Johannesteijsmannia 112 , Laccosperma 55,106 , Lanonia 113 , Licuala 114–116 , Linospadix 90,117 , Livistona 118,119 , Metroxylon 120 , Nenga 121 , Oncocalamus 55,106 , Orania 122 , Parajubaea 123 , Phoenix 124 , Pinanga 125 , Ptychosperma 126 , Pritchardia 127 , Rhapis 128 , Sabal 129 , Syagrus 130–134 , Veitchia 135 , Wallichia 136 ). We further obtained raw data (i.e.…”

A monograph of the Nengella group of Hydriastele (Arecaceae)

“…NOTES. Hydriastele simbiakii is the only rheophytic species in the Nengella group, although a second rheophytic species in the genus, H. rheophytica, a member of the H. wendlandiana group (Dowe & Ferrero 2000b;Petoe et al 2018), is known. Although closely related to H. pinangoides and other species with ruminate endosperm, it is immediately distinguished by its ecological preferences (scattered clumps of this species are restricted to a strictly riverine habitat) and by its leaves which have numerous regularly arranged, linear leaflets.…”

A monograph of Hydriastele (Areceae, Arecaceae) in New Guinea and Australia

“…Later, Burret (1937b) synonymised Adelonenga under Hydriastele sensu Wendland and Drude (1875) applying the same logic that the only difference is in the endosperm condition (ruminate in Adelonenga and homogeneous in Hydriastele). Heatubun et al (2018) and Petoe et al (2018) give more detailed taxonomic history accounts of the understorey to midstorey genera Nengella and Hydriastele sensu Burret (1936Burret ( , 1937b.…”

“…In addition, both H. variabilis and H. rheophytica have basal leaflets that are obliquely praemorse or pointed at their tips, rather than truncately praemorse. Petoe et al (2018) describe the taxonomy and morphology of H. wendlandiana in more detail.…”

“…Hydriastele kasesa is most similar to H. wendlandiana to which it is no doubt closely related, but H. wendlandiana is usually taller and less slender, has leaves with 12-40 leaflets on each side of the rachis (rarely 12-13 leaflets per side), leaf sheaths longer than 40 cm, and inflorescences with 8-15 primary branches. Hydriastele kasesa is described in more detail by Petoe et al (2018). Clustering, moderately slender palm to 6 m tall, bearing 7-10 leaves per crown.…”