Characters;"P. wui";"P. chishuiensis"
Rhizome;"present, becoming very long and up to 30 cm or longer after years of growth";"lacking rhizome"
"Leaf blade"
;Shape;oval-oblong;"oblong or oblanceolate"
Margin;"entire to inconspicuously or conspicuously undulate and densely ciliate";serrate
"lateral veins";4‒5-paired;5‒6-paired
"Flowers number per cyme";"4–10-flowered or more";"usually 1–3-flowered"
Bracts
;Shape;lanceolate;oblong
Width;"ca. 0.5 mm wide";"ca. 3 mm wide"
Indumentum;"both surfaces densely covered multicellular nodose villous and hairs ca. 1.5 mm long with ca. 3 cells";"outside whitish pubescent, inside sparsely pubescent"
Bracteoles;Size;"ca. 3 × 0.25 mm";"6–7 × ca. 1.5 mm"
Calyx;"5-sected to near the base, but base slightly united forming calyx tube and tube ca. 1 mm long";"5-sected from base"
Filaments
;Length;"two longer ones 4.5 mm long, two shorter ones ca. 4 mm long";"two longer ones ca. 9 mm long, two shorter ones ca. 8 mm long"
Indumentum;"densely with brownish-black glands especially from the middle to the base and glandular-puberulent close to the upper of filament";"densely with glandular-puberulent hairs especially at the base"
Anthers
;Length;"ca. 1 mm long";"ca. 1.8 mm long"
Indumentum;"sparsely semi-transparent glands";glabrous
Staminodes;"pale purple, club-like, glabrous";"absent or extremely indistinctive"