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| Peliosanthes oksanae Kalyuzhny & N. Tanaka in Tanaka & Kalyuzhny, 2020. |
Abstract
Peliosanthes oksanae is described and illustrated as a new species from eastern Thailand. It is most similar to P. gracilipes known from northern and southwestern Thailand and northwestern Laos, from which it differs mainly by the shorter flowering stem, flowers borne singly or binately in the axils of the bracts and almost free oblong filaments not forming a typical corona. We briefly discuss taxonomic relationships between P. oksanae and two similar species, P. gracilipes and P. caesia. It is notable that especially P. oksanae and P. gracilipes are close in floral characters to Ophiopogon. We also report P. triandra, which was described from southern Cambodia, as new to Thailand. Both P. triandra and P. oksanae occurred in the same habitat.
Keywords: Monocots, Convallariaceae, flora of Thailand, Indochina, plant morphology, Ophiopogoneae, staminal filaments
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| FIGURE 2. Inflorescences and flowers of Peliosanthes oksanae in cultivation (same plant as in fig. 1). A. Inflorescences borne on plant. B. Bud cut lengthwise. C-H. flower and its parts. C. flower viewed from above. D, E. Side views. f. Pistil surrounded by androecium, with all perianth segments removed. G. Same as f, but two frontal stamens detached and placed aside. H. flower cut lengthwise. Photos by S. Kalyuzhny; edited by N. Tanaka. |
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| FIGURE 1. Habitat and plant of Peliosanthes oksanae cultivated at Botanical Garden of Irkutsk State University (accession number 1336-12, parts of which were collected as the holotype, IRKU 013031). A. Scenery near the habitat. B-D. flowering plant, showing habit. E, F. Adaxial (E) or abaxial surface (f) in part of foliage leaves, showing longitudinal and transverse veins. Photos by S. Kalyuzhny; edited by N. Tanaka. |
Peliosanthes oksanae Kalyuzhny & N. Tanaka
Noriyuki Tanaka and Sergey S.S. Kalyuzhny. 2020. A New Species and A New Record of Peliosanthes (Asparagaceae) from eastern Thailand. Phytotaxa. 470(4); 290-297. DOI: 10.11646/phytotaxa.470.4.3
