Caesalpinia decapetala
var. japonica is a deciduous liana with sharp thorns on
branches, inhabiting lowland forest edges or riversides, creeping up
on plants around. Leaves are of bipari-pinnate leaf, with 3-8 pairs
of pinnules, each with 5-12 lobes, 1-2.5cm long, 5-10mm wide, long
oblong. Pedicles and rhachises also have many retrorse prickles on
each of them. Twenty to thirty-centimeter-long racemes put yellow
flowers in them. The flowers, 5-petaled, measure 2.5-3cm in
diameter; the upper petals are smaller than the other four's and
with long red stripes. Stamens surrounding pistils are red, which
cover pistils. Bloom time: May-June. |