Northeastern Asian Flora
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Biancaea decapetala (Roth) O.Deg.   (redirected from: Caesalpinia decapetala (Roth) Alston)
Family: Fabaceae
[Biancaea sepiaria Tod., moreCaesalpinia decapetala (Roth) Alston, Caesalpinia decapetala var. japonica (Siebold & Zucc.) H.Ohashi, Caesalpinia decapetala var. pubescens P.C.Huang, Caesalpinia japonica Siebold & Zucc., Caesalpinia sepiaria Roxb., Caesalpinia sepiaria var. japonica (Siebold & Zucc.) Gagnep., Caesalpinia sepiaria var. pubescens Tang & F.T.Wang, Reichardia decapetala Roth]
Biancaea decapetala image
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Japan Flora: Somewhat scandent shrub, 1-2 m. high; branches much elongate, with prominent retrorse prickles, short-pubes­cent while young; leaves 20-40 cm. long, prickly on rachis and petioles, the pinnae 6-16, the leaflets vivid green on upper side, whitish beneath, sometimes slightly pubescent, the lateral nerves not prominent; racemes terminal, 20-30 cm. long, pedunculate, the bracts narrowly ovate, caducous, 3-4 mm. long, densely brownish pubescent, the pedicels spreading, slender; flowers 25-30 mm. across, expanded, yellow; stamens red, densely villous on the lower half; legumes oblong, slightly arcuate, sessile, flat, glabrous, about 10 cm. long, 3 cm. wide, with a thick winglike outer suture.  Apr.-June. Woods and grassy places in lowlands and hills.

Honshu (Kanto Distr. and westw.), Shikoku, Kynshu; rather common. Ryukyus and China (?).

Biancaea decapetala
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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