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| Gastrodia biruensis Dwitara, Fatih, Yudistira & Mustaqim, in Dwitara, Fatih, Yudistira et Mustaqim, 2025. |
Abstract
Gastrodia biruensis Dwitara, Fatih, Yudistira & Mustaqim, a new mycoheterotrophic orchid species from the eastern part of Java, Indonesia, is described and illustrated. It is similar to two other Javan endemics G. crispa J.J.Sm. and G. selabintanensis Tsukaya & A.Hidayat, but differs in several morphological details, as well as flower colour. Information on its distribution and ecology, photographs and illustrations are provided.
Keywords: biodiversity, herbs, orchids, conservation, taxonomy, mycoheterotrophic orchids, terrestrial
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| Morphology of Gastrodia biruensis. A. Plant habit, B. Rhizome, C. Scale, D. Flower frontal view, E. Dorsal view, F. Flower lateral dissection, G. Sepals and petal adaxial view, H. Sepals and petal abaxial view, I. Pedicel, ovary, column and labellum lateral view, J. Column with ovary, K. Column stelidia, L. Column dorsal view, M. Labellum adaxial surface, N. Labellum abaxial surface, O. Anther-cap, abaxial and adaxial view, P. Pollinarium, Q. Floral bract, adaxial (ad) and abaxial view (ab). All from type material. Photograph by Fariq I. A. Shidiq and design by Yuda R. Yudistira. |
Gastrodia biruensis Dwitara, Fatih, Yudistira & Mustaqim, sp. nov.
Diagnosis: Gastrodia biruensis is similar to G. crispa J.J.Sm., but differs in having larger flowers (3.2–3.8 × 1.2–1.7 cm vs 1.8–2 × 0.9–1.3 cm), smooth (vs warty) outer sepal surface, petals white with an orange center extending to the apex (vs pure white), a larger labellum (11–13 × 7–10 mm vs 7–7.6 × 6–7 mm), labellum whitish-orange in the basal half and orange in the upper half, with two orange calli (vs white suffused pale yellowish green near apex), apex of labellum obtuse (vs acute), a longer column (10 mm vs 6.5–7 mm), orange (vs white) column margin, and orange (vs white) stelidia. Gastrodia biruensis is also similar to G. selabintanensis Tsukaya & A.Hidayat but differs in having larger flowers (3.2–3.8 × 1.2–1.7 cm vs c. 1.7 × 0.9 cm), labellum much longer than the column by c. 1.6 times (vs 1.1–1.3), yellowish basal calli (vs pure white), labellum orange in the upper half distal calli (vs yellowish white), orange (vs white) column margin, and orange (vs white) stelidia. (Table 1)
Galuh A.C. Dwitara, Muhammad Al Fatih, Yuda R. Yudistira, Wendy Achmmad Mustaqim. 2025. A New Species of Gastrodia (Orchidaceae: Epidendroideae) from East Java, Indonesia. Telopea. 29; 285–291.
