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| Rigiolepis gayoensis Mustaqim, M.N.Tamayo & P.W.Fritsch, in Mustaqim, Tamayo, Hutabarat, Arico et Fritsch, 2023. DOI: 10.36253/jopt-14872 |
Abstract
A new species of Ericaceae from the Gayo Plateau, Aceh Province, Indonesia is described. Rigiolepis gayoensis resembles R. lanceolata but differs by having shorter leaves, non-protruding basal leaf glands, longer flowering pedicels, a glabrous hypanthium, and a dark red or maroon corolla. A detailed morphological description, ecological notes, conservation status, and photographs are presented. The new species represents the third species of Rigiolepis found in the island of Sumatra. A key to the species of Rigiolepis in Sumatra is provided.
Keywords: epiphyte, Rigiolepis, Sumatra, taxonomy, Vaccinioideae
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| Rigiolepis gayoensis Mustaqim, M.N.Tamayo & P.W.Fritsch. A. Leafy branchlet. B. Portion of stem showing indumentum, per-ennating buds, and cordate leaf blade base. C. Adaxial leaf surface. D. Abaxial leaf surface. E. Inflorescence. F. Anterior view of flower. G. Ovary cross-section. H. Immature fruits. I. Mature (left) and submature (right) fruits. Scale bar: A = 1 cm, B, G = 2 mm, C, D, H, I = 5 mm, E = 2 mm, F = 1 mm. Photographs by Wendy A. Mustaqim. A–F, H, I from the holotype W.A. Mustaqim 2563; G from W.A. Mustaqim 2575. |
Rigiolepis gayoensis Mustaqim, M.N.Tamayo &. P.W.Fritsch, sp. nov.
Diagnosis: Rigiolepis gayoensis closely resembles R. lanceolata (Blume) J.J.Sm. but differs by having shorter leaves [4.6–5.5 cm vs. c. 9.0 cm (or longer)], non-protruding basal leaf glands (vs. protruding), longer flowering pedicels (c. 11 mm vs. 2–3 mm), a glabrous hypanthium (vs. densely hairy), and a dark red or maroon corolla (vs. creamy white).
Wendy A. Mustaqim, Maverick N. Tamayo, Prima W.K. Hutabarat, Zulfan Arico and Peter W. Fritsch. 2023. A New Species of Rigiolepis (Ericaceae: Vaccinioideae) from the Gayo Plateau, Aceh Province, Indonesia. Webbia. 78(2); 73-78. DOI: 10.36253/jopt-14872
