Characters;"P. nana";"P. yangshuoensis" Leaf-blades;"elliptic to ovate, 1.6–1.8 × 1.1–1.3 cm";"broadly ovate-round, subround or round, 3.5–6.5 × 2–4.5 cm" "Leaf indumentum";"densely nearly erect semitransparent papillose-puberulent on adaxial surface, 1–2 mm long, abaxially purple, densely white pubescent, 1–2 mm long";"densely erect semitransparent or white multicellular papillose-hispid on both surfaces, 0.8–1 cm long on the adaxial surface, 4–5 mm long on the abaxial surface" Peduncle;"3–5 cm long";"8–9 cm long" Bracts;"oblong to linear, 2.5–3 × ca.1 mm";"lanceolate or subulate, 1–2 × 0.3–0.5 mm" "Calyx lobes";"Usually, one serrate at the middle";entire Corolla;"ca.1.5 cm long, tube tubular and gradually narrow to the bottom";"2–3 cm long, tube broadly infundibuliform" Disc;"ca. 0.6 mm high";"ca. 1 mm high"