Table 1. Morphological comparison between Hoya pyrifolia E.F.Huang, its closest relatives and morphologically-similar species. TaxaLeafInflorescenceCoronaCalyx lobesPolliniaH. chinghungensisOvate to broadly ovate, 10-13 mm × 7-10 mm; pubescent on both surfaces when young; base rounded to truncate, apex rounded to obtuse or acuminate; midvein evident on both surfaces4-5-flowered; peduncle ca. 8 mm longRose-colored1.5-2 mm longUnknownH. dickasonianaElliptic or ovate, 9-19 mm × 5-10 mm; glabrous; base broadly cuneate to rounded, apex obtuse; midvein evident on both surfaces3-6-flowered peduncle ca. 5 mm longUnknown2-2.5 mm longOblong; ca. 1 mm long;H. englerianaNarrowly oblong, 20-25 mm × ca. 5 mm; pubescent on both surfaces when young; base cuneate, apex usually obtuse with mucro; midvein evident abaxially5-7-flowered; peduncle ca. 6 mmRose-colored1.5-2 mm longUnknownH. kingdonwardiiElliptic to slightly elliptic-lanceolate, 10-17 mm × 5-10 mm; glabrous; base cuneate and apex acuminate; midvein evident on both surfaces3-4-flowered; peduncle 7-10 mm longUnknownca. 3 mm longOblong; ca. 0.8 mm longH. lanceolataLanceolate, ca. 25 mm × 15 mm; based cuneate to narrowly cuneate, apex acuminate; sparsely pubescent on both surfaces when young; midvein evident on both surfaces;7-12-flowered; peduncle ca. 12 mmRose-coloredUnknownUnknownH. longicalyxOvate-lanceolate, 15-20 mm × ca. 10 mm; base rounded, apex acuminate; slightly pubescent; midvein depressed adaxially, raised abaxially;3-4-flowered; peduncle ca. 5 mm longWhitish5-7 mm longClavate; 0.55-0.6 mm long, narrowing towards the base;H. pyrifoliaPyriform, 10-14 mm × 4-7 mm; slightly pubescent adaxially, glabrous abaxially; base obtuse or rounded, apex rounded or truncate; midvein absent adaxially, obscure abaxially4-flowered; peduncle 8-10 mm longRose-coloredca. 4 mm longOblong; ca. 0.6 mm long

Published as part of Huang, Er-Feng, Yao, Gang, Jiang, Ri-Hong, Yang, Lei-Lei, Xi, Wang, Zhang, Zhong-Shuai & Zhang, Xian-Chun, 2021, Hoya pyrifolia (Apocynaceae), a new species from south-western Yunnan, China, pp. 95 in PhytoKeys 174 on page 95, DOI: 10.3897/phytokeys.174.60137