taxonID	type	description	language	source
03CDB519FFD2311FEB83FCDEFEA7FA69.taxon	materials_examined	Type: — TAIWAN. Taichung: Mt. Tugitaka, ca. 3250 m, 25 October 1936, K. Mori s. n. (holotype TAI! [sheet no. 118794], image available at http: // tai 2. ntu. edu. tw / specimen / specimen. php? taiid = 118794; isotype: P! [barcode no. P 00734209], image available at https: // science. mnhn. fr / institution / mnhn / collection / p / item / p 00734209? listIndex = 26 & listCount = 908). Additional specimens examined: — TAIWAN. Ilan: En route from Chihyushan to Hsingta Camp, 2900 – 3300 m, 13 August 1993, C. H. Chen et al. 264 (HAST. Taichung: Mt. Chihyu, 3000 – 3200 m, 7 August 2008, T. C. Hsu 1541 (TAIF); 24 July 2012, T. C. Hsu 6076 (TAIF).	en	Hsu, Tian-Chuan, Chung, Shih-Wen (2016): Two new combinations in Polygonaceae for the Flora of Taiwan. Phytotaxa 270 (1): 69-70, DOI: 10.11646/phytotaxa.270.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.270.1.8
03CDB519FFD2311FEB83FCDEFEA7FA69.taxon	discussion	Note: — Polygonum yatagainum, a neglected species in both Flora of Taiwan (Liu et al. 1976, Kuo et al. 1996) and Flora of China (Li et al. 2003), is closely related to the Himalayan Koenigia delicatula (Maisner 1857: 127) Hara (1966: 70), but differs in having smaller habits (up to 8 cm tall), usually solitary flowers, and 4 - partite perianth. K. delicatula, on the other hand, has larger habits (up to 30 cm tall), usually clustered flowers, and 5 - partite perianth (Hedberg 1988, 1997, Li et al. 1998, 2003). We thus disagree with Hedberg (1997) who placed P. yatagaianum in synonymy under K. delicatula subsp. delicatula. Since very few data are available in previous literature, voucher specimens of K. yatagaiana are also cited here for reference as well as the type. Fan et al. (2013) suggested that Koenigia as defined by Hedberg (1997) and Li et al. (2003) is paraphyletic, and K. delicatula should be segregated into a new genus to keep the rest species of Koenigia s. str. monophyletic. It is possible that K. yatagaianum also belongs to their new genus due to its morphological similarity with K. delicatula. However, in a more recent systematic study, Schuster et al. (2015) disagreed the suggestion of Fan et al. (2013) but redefined an enlarged Koenigia to keep its monophyly, and a new genus for K. delicatula and K. yatagaianum is hence not necessary.	en	Hsu, Tian-Chuan, Chung, Shih-Wen (2016): Two new combinations in Polygonaceae for the Flora of Taiwan. Phytotaxa 270 (1): 69-70, DOI: 10.11646/phytotaxa.270.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.270.1.8
03CDB519FFD2311FEB83F9CDFACFF8E8.taxon	materials_examined	Type: — TAIWAN. Nantou, Pilushan, ca. 2500 m, 2 August 1975, F. Y. Lu & C. H. Ou 3612 (holotype: NCUF!; isotype: TAI! [sheet no. 179368], image available at http: // tai 2. ntu. edu. tw / Specimen / specimen. php? taiid = 179368).	en	Hsu, Tian-Chuan, Chung, Shih-Wen (2016): Two new combinations in Polygonaceae for the Flora of Taiwan. Phytotaxa 270 (1): 69-70, DOI: 10.11646/phytotaxa.270.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.270.1.8
03CDB519FFD2311FEB83F9CDFACFF8E8.taxon	discussion	Note: — Persicaria pilushanensis is the only endemic species among the 35 congeneric taxa so far recognized in Taiwan (Kuo et al. 1996, Hsu et al. 2004, Yeh et al. 2010, Chung & Hsu 2015). It is closely related to the widespread and variable P. chinensis (Linnaeus 1753: 363) Gross (1913: 269), but it can be readily distinguished from the latter by its dwarf habits (up to 20 cm tall) and truncate and ciliate ocrea. The combination “ Persicaria pilushanensis ” was first proposed in a thesis (Kuo 1997) which is not effectively published and thus invalid (see Art. 30.8 of the Melbourne Code (McNeill et al. 2012 )).	en	Hsu, Tian-Chuan, Chung, Shih-Wen (2016): Two new combinations in Polygonaceae for the Flora of Taiwan. Phytotaxa 270 (1): 69-70, DOI: 10.11646/phytotaxa.270.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.270.1.8
