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| Hoya longicalyx Wang Hui & E. F. Huang |
Abstract
Hoya longicalyx Wang Hui & E. F. Huang, a new species of Hoya R. Br. (Apocynaceae: Asclepiadoideae) from Yingjiang county (Yunnan, China), is described and fully illustrated. The new species is morphologically similar to H. chinghungensis (Tsiang & P.T. Li) M.G. Gilbert, P.T. Li & W.D. Stevens, but can be easily distinguished by its rounded lamina base, longer and linear calyx lobes, ovate and translucent corona lobes. Result from molecular phylogenetic analysis revealed that the new species was sister to Hoya engleriana Hosseus.
Keyword: Hoya, new taxon, Phylogenic Analysis, ITS, 5’- ETS, psbA-trnH, trnT-trnL, matK
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| Fig. 3. Hoya longicalyx. A. Habits of the new species in situ, arrows indicate the plants. B. Inflorescence. C. Leaves. D. Branch and inflorescence. E. Leafy stem. F. Petiole. G. Lamina margin. H. Bracteoles. I. Corona (top view and side view). J. Calyx. K. Corolla (adaxial and abaxial sides). L. Pollinarium. M. Pistils. Photographed by H. Wang and E. F. Huang. |
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| Fig. 2. Hoya longicalyx. A. Branch with inflorescences. B. Leafy stem and leaf. C. Bracteole. D. Calyx and ovaries. E. Corolla (adaxial side). F. Corolla (abaxial side). G. Corona (side view). H. Corona lobe (side view). I. Pollinarium. J. Pistils. Drown by Z. M. Li and H. Dong. |
Hoya longicalyx Wang Hui & E. F. Huang, sp. nov.
長萼球蘭
Type: CHINA. Yunnan Province: Yingjiang county,
A-jiang-po, elev. ca. 1900 m, on arboreal branch covered
by moss in mid-montane evergreen forest, 16 May 2019,
Huang Er-feng 1905003 (holotype SZG!; isotype PE!,
KUN!, TAI!).
Diagnosis: Morphologically similar to Hoya
chinghungensis (Tsiang & P.T. Li) M.G. Gilbert, P.T. Li
& W.D. Stevens from which it differs in having longer
lamina (1.5–2 cm vs. 1–1.5 cm), acuminate lamina apex
(vs. acute to obtuse lamina apex), longer calyx lobes (5–
7 mm vs. 1.5–2 mm), ovate and translucent corona lobes
(vs. pink and triangular corona lobes) and oblong and
upside apart ovaries (vs. ovate and attached ovaries).
Geographical distribution: Hoya longicalyx is
known only from the type locality in Yingjiang county,
Yunnan province, southwest China, base on the
fieldwork and herbaria investigations in HITBC
(Herbarium, Xishuangbanna Tropical Botanical Garden,
CAS), IBSC (South China Botanical Garden, CAS), PE
(Institute of Botany, CAS) and KUN (Herbarium,
Kunming Institute of Botany, CAS).
Ecology: Epilithic on arboreal branch covered by
moss (Trachypodopsis serrulata) under mid-montane
evergreen forest.
Etymology: Hoya longicalyx is named from its long
and linear calyx lobes, which is a significant feature to
distinguish the new species from relevant species.
Er-Feng Huang, Lei-Lei Yang, Wang Xi, Yi-Ye Liu and Hui Wang. 2020. Hoya longicalyx, A New Species of Hoya (Apocynaceae: Asclepiadoideae) from Yunnan, China. Taiwania. 65(3); 353-359. taiwania.ntu.edu.tw/abstract.php?type=abstract&id=1694
