Botanical name: Senna corymbosa Family: Caesalpiniaceae (Gulmohar family)
Synonyms: Cassia corymbosa, Cassia floribunda, Cassia crassifolia
Argentina Senna is a shrub or small tree, growing up to 3 m tall and often sprawling over surrounding vegetation. The rounded hairless stems, reddish at first, turn black with age. Leaves are alternate and compound with 2-3 pairs of opposite leaflets. Leaflets are lance-shaped to oblong with a pointed tip. One erect gland is present on the axis between the lowest leaflet pair. Showy clusters of bright yellow flowers are borne near the stem tips. The fruit is a long straw-colored sub-cylindrical pod. It contains numerous compressed brown seeds, arranged in one row. Argentina Senna is native to Central & S. Brazil to N. Argentina, cultivated widely.
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The flower labeled Argentina Senna is ...