Notes on Malesian Fabaceae (Leguminosae-Papilionoideae) 17. The genus Dalbergia

Abstract

A systematic treatment of the genus Dalbergia for the Flora Malesiana (FM) region is presented. The treatment includes a genus description, two keys to the species, an enumeration of the species present in the FM-area with names and synonyms, details of distribution, habitat and ecology and where needed some notes, three new species (D. minutiflora, D. pilosa, D. ramosii For the Flora Malesiana treatment we recognise 33 species. In the following sections a genus description, two keys to the Malesian species, notes on species and typification, one new name and the description of three new species will be given. DalbergiaDalbergia L.f. (1781) Trees, erect or scandent shrubs to woody climbers, sometimes spiny, with or without red sap. Leaves imparipinnate, rarely unifoliolate; stipules present, caducous, very rarely persistent; stipellae absent; leaflets usually alternate. Inflorescences axillary, terminal or raminascent, racemes or panicles. Bracts subpersistent or caducous. Bracteoles present, caducous or (sub)-persistent. Calyx bell-shaped, bilabiate, upper lip 2-toothed, lower lip 3-toothed, median (lowest) tooth usually longest. Corolla: standard without callosities; wings usually sculpted, adhering to the keel petals; keel petals slightly shorter than or as long as the wings. Stamens 9 -10, monadelphous, than usually an open sheath, or diadelphous than usually 2 bundles of 5 (or 1 of 5 and 1 of 4); anthers all equal, fertile. Ovary stipitate; ovules few; stigma terminal. Fruits indehiscent, (strongly) flattened, often thickened around the seeds or less flattened, ± leathery or woody, sometimes articulate. Seeds flattened bean-shaped to flattened ellipsoid, hilum usually eccentric.Distribution -C. 185 species, pantropic, in Malesia 33 species.Note -Corolla parts are usually glabrous. Only in very few specimens hairs at the standard were observed: PPI 1294 (Stone et al.): some hairs at the outside of the standard, this specimen is included in D. canescens, S. 23493 (Anderson): some hairs at the standard. This specimen has also diadelphous stamens (9 + 1). It may represent a new species. For several species the annotations of the habit are at first confusing. Label information gives for the same species: (scandent) shrub, tree or climber. Probably plants of the species start live as shrub or small tree with long supple and ± climbing branches. Later on or when good support is present they may develop into large lianas. Problems with identification are, in part, due to uncertainties of the true habit when fully mature. In many species not all ovules develop into seeds. KEY TO THE SPECIES Of

Unraveling genetic variations of Dalbergia latifolia (Fabaceae) from Yogyakarta and Lombok Island, Indonesia

“…Dalbergia latifolia was introduced to Indonesia perhaps during the colonial era, possibly from India, and has been naturalized in several islands of Indonesia (Sunarno 1996;Maridi et al 2014;Arisoesilaningsih and Soejono 2015;Adema et al 2016). The species have been cultivated mainly in agroforestry (Hani and Suryanto 2014;Mulyana et al 2017) and monoculture plantation (Atikah and Dede 2018, unpublished).…”

Taxonomic Studies on Malagasy Dalbergia (Fabaceae). III. Two New Species from Southeastern Madagascar and an Emended Description of the Rosewood Species Dalbergia maritima

“…The main characters of the genus, as currently understood and reported in several regional treatments (e.g. Prain 1904;De Carvalho 1997;Niyomdham et al 1997;Bosser and Rabevohitra 2002;Dezhao et al 2010;Adema et al 2016;Lachenaud and van der Maesen 2016) and more global analyses (e.g. Bentham 1860;Baretta-Kuipers 1971), can be summarized as follows:…”

Preliminary Study of Ecology, Harvest and Trade of Dalbergia parviflora in Central Kalimantan Indonesia

“…Dalbergia parviflora, locally known as akar laka, is an erect shrub or strong woody climber up to 30 m tall [1]. In Indonesia, this species is distributed in Sumatra, Kalimantan, and Maluku [1,2].…”