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Arisaema globiceps T.C. Hsu, W.J. Huang & S.W. Chung,
in Hsu, Huang et Chung, 2025. |
Abstract
A new species, Arisaema globiceps (Araceae), is described from southern Taiwan. Morphologically, it is closely related to A. consanguineum and A. formosanum but can be readily distinguished by its spadix appendix, which is apically abruptly dilated into a globular knob. Additional information about its morphology, distribution and ecology is provided.
Keyword: Arisaema consanguineum, Arisaema formosanum, Aroideae, Arisaematae, taxonomy
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Morphology of Arisaema globiceps, from Hsu 11448 (A–H, J, L; type), Chang ZXC001608 (I), Hsu 14070 (K, M) and Hsu 13232 (N). A. Habitat and habit. B. Leaf. C. Tuber and plant base. D. Inflorescence. E. Male inflorescence, with spathe expanded. F– I. Globose tips of spadix appendix from different plants. J. Male spadix. K. Female spadix. L. Synandra. M. Ovaries. N. Infructescence.
Scale bars: A = 20 cm; B, D, E, N = 5 cm; C, J, K = 2 cm; F–I = 5 mm; L, M = 1 mm. |
Arisaema globiceps T.C. Hsu, W.J. Huang & S.W. Chung, sp. nov.
Diagnosis: Arisaema globiceps resembles A. consanguineum and A. formosanum in terms of gross morphology but can be readily distinguished by its globose dilation at the tip of its spadix appendix. In contrast, A. consanguineum features a clavate spadix appendix, while that of A. formosanum is filiform.
Etymology: The specific epithet is derived from globus, meaning “ball” or “sphere”, and –ceps, meaning “headed”, referring to its diagnostic globose dilation at the tip of the spadix appendix. We also propose a Mandarin vernacular name “頂珠天南星”.
Tian-Chuan Hsu, Wei-Jie Huang and Shih-Wen Chung. 2025. Arisaema globiceps (Araceae), A New Species from Taiwan. Taiwania. 70(2); 281-284. DOI: 10.6165/tai.2025.70.281 [01 April 2025]