省沽油 Staphylea bumalda

  • Scientific Name: Staphylea bumalda DC.
  • Ref: Prodr. 2:2. 1825
  • Synonyms: Bumalda trifolia Thunb.; Staphylea chrysodonta Jungh.; S. franchetii H.Boissieu
  • English Common Name: Japanese bladdernut
  • Chinese Common Name: shěng∙gūyóu
  • Japanese Common Name: ミツバウツギ [三葉空木] mitsubautsugi
  • Family: Staphyleaceae
  • Genus: Staphylea
  • Distribution: Open forests, roadsides. Anhui, Hebei, Heilongjiang, Jiangsu, Jilin, Liaoning, Shaanxi, Shanxi, Sichuan [Japan, Korea].
  • Photo: Baizhang Ridge, Zhejiang
Shrubs, 2(-5) m tall; bark dark red or grayish brown with vertical stripes. Branches spreading, greenish white. Leaves trifoliolate; petiole 2.5-3 cm; petiolule of terminal leaflet 5-10 mm, that of lateral leaflets 1-2 mm; leaflet blades elliptic, ovate, or lanceolate-ovate, (3.5-)4.5-8 × (2-)2.5-5 cm, glabrescent and green on adaxial surface, pubescent along veins and pale green on abaxial surface, base cuneate or rounded, margin serrulate with sharp teeth, apex caudate with ca. 1 cm cauda. Inflorescence a terminal panicle, erect. Flowers white. Sepals light yellow, elliptic. Petals white, obovate to elliptic, 5-7 mm, slightly larger than sepals. Stamens 5, as long as petals. Ovary 2-locular; styles 2, free. Capsule bladderlike, compressed, 2-locular, dehiscing at apex. Seeds shining yellow. Fl. Apr-May, fr. Aug-Sep. (Flora of China)

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