Table 1.

Morphological comparison between Hoya pyrifolia E.F.Huang, its closest relatives and morphologically-similar species.

Taxa	Leaf	Inflorescence	Corona	Calyx lobes	Pollinia
H. chinghungensis	Ovate 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 surfaces	4–5-flowered; peduncle ca. 8 mm long	Rose-colored	1.5–2 mm long	Unknown
H. dickasoniana	Elliptic or ovate, 9–19 mm × 5–10 mm; glabrous; base broadly cuneate to rounded, apex obtuse; midvein evident on both surfaces	3–6-flowered peduncle ca. 5 mm long	Unknown	2–2.5 mm long	Oblong; ca. 1 mm long;
H. engleriana	Narrowly oblong, 20–25 mm × ca. 5 mm; pubescent on both surfaces when young; base cuneate, apex usually obtuse with mucro; midvein evident abaxially	5–7-flowered; peduncle ca. 6 mm	Rose-colored	1.5–2 mm long	Unknown
H. kingdonwardii	Elliptic to slightly elliptic-lanceolate, 10–17 mm × 5–10 mm; glabrous; base cuneate and apex acuminate; midvein evident on both surfaces	3–4-flowered; peduncle 7–10 mm long	Unknown	ca. 3 mm long	Oblong; ca. 0.8 mm long
H. lanceolata	Lanceolate, 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 mm	Rose-colored	Unknown	Unknown
H. longicalyx	Ovate-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 long	Whitish	5–7 mm long	Clavate; 0.55–0.6 mm long, narrowing towards the base;
H. pyrifolia	Pyriform, 10–14 mm × 4–7 mm; slightly pubescent adaxially, glabrous abaxially; base obtuse or rounded, apex rounded or truncate; midvein absent adaxially, obscure abaxially	4-flowered; peduncle 8–10 mm long	Rose-colored	ca. 4 mm long	Oblong; ca. 0.6 mm long