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| Diplycosia puradyatmikai Mustaqim, Utteridge & Heatubun
in Mustaqim, Chikmawati, Utteridge & Heatubun, 2020.
Photos by Wendy A. Mustaqim.
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Abstract
Diplycosia puradyatmikai, a new species of Ericaceae, is described from Mount Jaya in the Indonesian province of Papua, western New Guinea. A detailed description, illustration, and comparisons with the similar species D. kosteri are provided.
Keywords: Diplycosia, new species, Papuasia, Indonesia, taxonomy, Ericales, Eudicots
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| FIGURE 1. Diplycosia puradyatmikai Mustaqim, Utteridge & Heatubun. A. Living plant. B. Young leaves and buds with long golden brown bristles. C. Leafy twig. D. Leafy twig showing lower leaf surfaces and some flowers. E. Flower. F. Young fruit. G. Older fruit.
Scale bar: A = 20 cm; B, C = 2 cm; D, E = 5 mm; F = 2 mm; G = 5 mm.
A–F from Mustaqim et al. 2234 and G from Mustaqim et al. 2236. Photos by Wendy A. Mustaqim.
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| FIGURE 2. Diplycosia puradyatmikai Mustaqim, Utteridge & Heatubun. A. Branch. B. Branch bristles. C. Adaxial leaf view. D. Abaxial leaf view. E. Detail of abaxial surface of leaf. F. Inflorescence. G. Flower. H. Stamens (ventral view with filaments flattened). I. Longitudinal section of ovary and style. J. Fruit.
Scale bar: A = 2 cm; B = 1 mm; C = 5 mm; D = 1 cm; E = 1 mm; F = 5 mm; G = 1 mm; H = 0.5 mm; I = 1 mm; J = 2 mm.
A–I from Mustaqim et al. 2234 and J from Mustaqim et al. 2236.
Drawn by Wendy A. Mustaqim.
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Diplycosia puradyatmikai Mustaqim, Utteridge & Heatubun, sp. nov.
Type:― INDONESIA. Papua: Mimika Regency, Tembagapura, road from Timika to Tembagapura, Mile 64, ridge north of Army Camp, 2770 m, 22 Nov. 2018, Mustaqim 2234 with Puradyatmika & Dominggus (holotype: BO!, isotypes: FIPIA!, MAN!).
Diagnosis:― Similar to D. kosteri Sleumer (1963: 117) in having hairy twigs, the absence of simple fine hairs, calyx with non-glandular bristles, glabrous filaments, the style shorter than 4 mm; but differs in the erect habit (vs scandent in D. kosteri), persistent twig bristles (vs early glabrescent), leaf blades usually broadly-ovate to suborbicular (vs elliptic) and comparatively smaller (0.8–) 1.6–2.8 × (0.7–) 1.5–2.5 cm (vs (2.5–) 2.8–4.5(–5.5) × (1.5–)2–3(–3.2) cm), the corolla tube widest near the base (vs widest near the mouth) with trichomes on the outer surface (vs glabrous), and shorter filaments (2.8–3 vs 3.5 mm long) and anthers 1.2–1.4 mm long (vs 1.8 mm long) (see also Table 1).
Etymology:― The epithet refers to the current General Supervisor of Highland Reclamation and Monitoring at the PT Freeport Indonesia Mining Company, Pratita Puradyatmika, who has a great interest in the biodiversity of Mount Jaya, and worked with biologists over many years to undertake biodiversity inventories in and around the region.
Distribution and Ecology:― New Guinea: endemic to Mount Jaya. In disturbed mid-montane forest dominated by Nothofagus regeneration; also on ridge shrubbery, with many ericaceous plants including Gaultheria pullei J.J.Sm. (Smith 1915: 7), Rhododendron sp. and other unidentified Diplycosia sp.; 2700−2770 m a.s.l.
Wendy A. Mustaqim, Tatik Chikmawati, Timothy M.A. Utteridge and Charlie D. Heatubun. 2020. A New Species of Diplycosia (Ericaceae) from Mount Jaya, western New Guinea. Phytotaxa. 442(2); 52–60. DOI: 10.11646/phytotaxa.442.2.1
