Papilionanthe motuoensis J.D.Ya & D.Z.Li, 2023
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publication ID |
https://dx.doi.org/10.3897/phytokeys.235.111230 |
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DOI |
https://doi.org/10.5281/zenodo.10170150 |
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persistent identifier |
https://treatment.plazi.org/id/5F97E7EB-BF0A-5454-835B-65DEA37917A4 |
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treatment provided by |
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scientific name |
Papilionanthe motuoensis J.D.Ya & D.Z.Li |
| status |
sp. nov. |
3. Papilionanthe motuoensis J.D.Ya & D.Z.Li sp. nov.
(墨脱凤蝶兰 Mo Tuo Feng Die Lan) Figs 6 View Figure 6 , 7A-C View Figure 7
Diagnosis.
Papilionanthe motuoensis is similar to P. uniflora (Lindl.) Garay but differs in having a glabrous pedicel and ovary (vs. glandular-pubescent). Its lateral petals are oblong-ovate (vs. oblong) with irregularly denticulate margins (vs. with undulating margins), truncate apices (vs. obtuse apices). Its labellum is white tinged with yellow (vs. uniformly white), with a subflabellate mid-lobe and a labellum base with an apically dilate to reniform claw, its apex is emarginated with an irregularly denticulate margin (vs. mid-lobe simple, oblong, apex widely cuneate).
Type.
China. Yunnan, Kunming, voucher from cultivated plants at Kunming Institute of Botany , CAS, 20 Oct. 2020 (flowering), J.-D. Ya BC201015 View Materials (holotype: KUN!), plants originally collected from Tibet (Xizang), Linzhi City , Motuo County, 1625 m, at the edge of a subtropical, evergreen, broadleaved forest .
Description.
Stems pendulous, terete, to 50 cm, 2.0 mm in diam. branched, enclosed in leaf sheaths. Leaves laxly alternate, terete, 9-16 × 0.2 cm, base with amplexicaul-sheathing, apex apiculate; sheaths tubular, 2.0-2.8 cm long, glabrous. Inflorescence ca. 1.5 cm, usually 1-2-flowered; peduncle slender, ca. 1.3 cm; floral bracts ovate-triangular, 1.5 × 1.2 mm. Flowers 2.5 cm in diam. sepals and lateral petals white, mid-vein pink, labellum white tinged with yellow, its spur with a whitish and/or pink tinge, apex yellowish green. Pedicel and ovary, ca. 1.2 cm long, glabrous. Dorsal sepal ovate, ca. 1.0 × 0.5 cm, acute, 5-veined; lateral sepals oblong, slightly falcate, ca. 1.1 × 0.4 cm, acuminate, 5-veined; lateral petals oblong-ovate, 1.1 × 0.6 cm, margin irregularly denticulate, apices truncate, 7-veined; labellum adnate to column foot, 3-lobed; lateral lobes deeply bifid, unequal, linear, acute, long lobule ca. 7.0 × 2.0 mm, short lobule ca. 4.0 × 1.0 mm; mid-lobe spreading, subflabellate, ca. 4.8 × 5.0 cm, base with a claw ca. 2.2 × 2.0 mm, apical dilate to reniform, apex emarginate, margin irregularly denticulate; spur slightly curved forward, cylindrical, ca. 22.0 × 3.5 mm, narrowing towards the terminus, its interior pubescent. Column 7.0 × 3.0 mm, foot ca 5.2 mm, with narrowly and entire wings decurrent to foot; anther cap galeate with a acuminate apex, 2.0 × 2.5 mm; pollinia 2, subglobose, ca. 1.0 mm in diameter, waxy, porate, attached by a stipe to a broad cellular viscidium.
Phenology.
Observed flowering in October.
Etymology.
The specific epithet " Papilionanthe motuoensis " refers to the type locality Motuo (Medog) County.
Additional specimens examined.
Tibet (Xizang), Linzhi City, Motuo County, Bangxin Xiang, 1330 m, from subtropical, evergreen, broadleaved forest. Oct. 2019, M.-K. Li and W. Wang 2019343 (paratypes, Herbarium of Tibet Agricultural and Animal Husbandry University, No. 8 Xueyuan Road, Bayi District, Nyingchi, Tibet). P. uniflora : Nepal. Gosain Than, N. Wallich no. 1993 (K001114863!); India, Mao, C.B. Clarke 41790 (K000891405!)
Distribution and habitat.:
The new epiphytic species was found only in Motuo County, Tibet (Xizang), China, growing on limbs in a subtropical, evergreen, broadleaved forest at elevations of 1300-1650 m.
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