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Issue: Vol. 655 No. 3: 26 Jun. 2024
Type: Article
Published: 2024-06-26
DOI: 10.11646/phytotaxa.655.3.4
Page range: 261-271
Abstract views: 96
PDF downloaded: 2

Thismia papillata (Thismiaceae), a new species from northern Vietnam

Joint Vietnam-Russia Tropical Science and Technology Research Center, 63, Nguyen Van Huyen street, Cau Giay, 122000 Hanoi, Vietnam, and 3, street 3 thang 2, Q10, Ho Chi Minh City, Vietnam. Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 1, 12, Leninskie Gory, 119234 Moscow, Russia..
Joint Vietnam-Russia Tropical Science and Technology Research Center, 63, Nguyen Van Huyen street, Cau Giay, 122000 Hanoi, Vietnam, and 3, street 3 thang 2, Q10, Ho Chi Minh City, Vietnam. Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 1, 12, Leninskie Gory, 119234 Moscow, Russia. A.A. Kharkevich Institute for Information Transmission Problems of the Russian Academy of Sciences, 19, 1, Bolshoy Karetny lane, 127051 Moscow, Russia.
Joint Vietnam-Russia Tropical Science and Technology Research Center, 63, Nguyen Van Huyen street, Cau Giay, 122000 Hanoi, Vietnam, and 3, street 3 thang 2, Q10, Ho Chi Minh City, Vietnam.
Joint Vietnam-Russia Tropical Science and Technology Research Center, 63, Nguyen Van Huyen street, Cau Giay, 122000 Hanoi, Vietnam, and 3, street 3 thang 2, Q10, Ho Chi Minh City, Vietnam. A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, 33, Leninsky avenue, 119071 Moscow, Russia.
Joint Vietnam-Russia Tropical Science and Technology Research Center, 63, Nguyen Van Huyen street, Cau Giay, 122000 Hanoi, Vietnam, and 3, street 3 thang 2, Q10, Ho Chi Minh City, Vietnam.
Joint Vietnam-Russia Tropical Science and Technology Research Center, 63, Nguyen Van Huyen street, Cau Giay, 122000 Hanoi, Vietnam, and 3, street 3 thang 2, Q10, Ho Chi Minh City, Vietnam. A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, 33, Leninsky avenue, 119071 Moscow, Russia.
Eastern Indochina flora mitre mycoheterotrophy plant diversity plant taxonomy stamen tube Xuan Lien Nature Reserve Fungi

Abstract

Thismia papillata, a new species of Thismiaceae, is described and illustrated. The species was discovered in 2023 in Thanh Hoa Province, northern Vietnam. The new species is readily distinguishable from most of its congeners by the presence of appendages of outer and inner tepals, inner tepals fused into a mitre, absence of a wing-like appendage of supraconnective and absence of interstaminal glands. Thismia papillata is similar to T. abei, T. taiwanensis and T. tuberculata, differing mainly in prominently papillate outer hypanthium surface, appendages of the outer tepals up to 15 mm long, appendages of the inner tepals up to 9 mm long, and column-like placentas. Gaps in understanding of interactions between the inner tepals in Thismia are highlighted that are related to the postgenital tepal fusion and tepal aestivation. Similar uncertainties in determination of fusion between the stamens are also uncovered.

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