Parnassia yui Jien 1963
Creators: name: Wang, Shi-Qi
name: Zhang, Xue-Mei
name: Shu, Yu-Min
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Celastrales
Celastraceae
Parnassia
Parnassia yui

description: Parnassia yui Jien (1963: 256)
Type.
China • Yunnan, Salwin-Kiukiang Divide, northeast of Sinpu, under bamboo thickets, 3000 m, 14 September 1938, T. T. Yu 20238 (holotype: PE 01842927!; isotypes: PE 01842926!, KUN 1205235!, KUN 1205238!)
Description.
Perennial herbs, glabrous. Rhizome sympodial. Stems 1 to 4, slender, 3–16 cm, with a tiny cauline leaf near middle. Basal leaves 1 to 7, petiole 1–4.5 cm; blade reniform, broad cordate or orbicular, 0.2–2.4 × 0.2–2.8 cm, base cordate, apex rounded or apiculate. Flower 0.8–1.5 cm in diam.; hypanthium turbinate. Sepals oblong, ovate or lanceolate, 2–3 × 1–2 mm, margin entire, apex acute. Petals white, densely purple-brown punctuate when dried, oblanceolate, triangular-ovate, to ovate-spartulate, 3–6 × 1.5–3.5 mm, base contracted into a claw ca. 2 mm, margin long fimbriate proximally, entire distally, apex acute to rounded-obtuse. Anthers ellipsoid, filaments 2–2.5 mm. Staminodes flat, broadly spatulate, 2 × 1–2 mm, apex shallowly 3 - lobed, dentate, undulate or rounded. Ovary superior, broadly ovoid; style ca. 1 mm; stigma 3 - lobed. Capsule depressed ovoid. Seeds brown, glossy, oblong.
Phenology.
Flowering from July to September, fruiting from August to October.
Distribution.
China, Myanmar and India.
Habitats.
Under shrubs, grassy rocks, ledges and slopes at an elevation of 3000–3900 m.
Additional specimens examined.
China. Yunnan, Gongshan County: • 3252 m alt., 21 August 2024, Y. M. Shu et. al. s 1166 (SITC); • 3336 m, 21 August 2024, Y. M. Shu et. al. s 1168 (SITC); • 3399 m alt., 21 August 2024, Y. M. Shu et. al. s 1170 (SITC); 30 July 2013, X. H. Jin et al. st 1518 (PE 01979311!); • 3600 m alt., 29 July 2013, X. H. Jin et al. st 1357 (PE!); • 3300 m alt., 22 July 2013, X. H. Jin et al. ST 0741 (PE!); 2 September 2011, S. X. Yu et al. 6521 (PE!); 24 August 2009, WWZ 126 (KUN!); • 3250 m alt., 19 September 2003, J. H. Chen 3051 (KUN!); • 3600 m, 19 September 2003, J. H. Chen 3053 (KUN!); 19 August 2003, J. M. Lu et al. 2319 (KUN!); • 3080 m alt., 2 October 2002, Gaoligong Shan Biodiversity Survey 16895 (CAS 0321223!); • 3400 m alt., 9 September 1940, K. M. Feng 7619 (PE 00866103!, KUN 0437239!, KUN 0437240!); • 3300 m alt., 20 August 1937, T. T. Yu 22447 (PE 01982464!, PE 01982465!, PE 00866102!); • 3100 m alt., 1 October 1935, Q. W. Wang 67226 (PE 00866104!); Fugong County: • 3700 m alt., 16 August 2005, H. Li et al. 28515 (CAS 0321224!); • 20 August 2003, 2800 m alt., J. M. Lu et L. M. Gao 2327 (KUN!); Lushui County: • 3050 m alt., 08 August 2011, X. H. Jin et al. 11171 (PE 02025103!).
Myanmar. • 3600 m, 30 August 1919, F. Kingdon Ward. 3599 (E 00275515 photo!).
Conservation status.
The conservation status of both P. farreri and P. yui have not been evaluated before. At present, P. farreri has been reported from China, Myanmar and India. Based on our field investigations, numerous individuals could be easily discovered under shrubs, in grassy slopes or on ledges, indicating the population survives and regenerates well. Thus, we propose to list P. farreri as Least Concern (LC) according to the IUCN Red List Categories and Criteria (IUCN Standards and Petitions Committee 2022).
description: Published as part of Wang, Shi-Qi, Zhang, Xue-Mei & Shu, Yu-Min, 2025, Taxonomic note of Parnassia (Celastraceae): the identity of P. yui, pp. 251-256 in PhytoKeys 251 on pages 251-256, DOI: 10.3897/phytokeys.251.140807