Plants of South Eastern New South Wales

Senna septemtrionalis

Flowers and leaves.  Australian Plant Image Index, photographer Murray Fagg, between Booral and Bulahdelah

Flowering stems. Photographer Don Wood, Bomaderry Creek Regional Park near Nowra

Flowering branches. Photographer Bart Wursten, Zimbabwe

Common name

Winter senna, Arsenic bush, Smooth cassia

Family

Fabaceae 

Where found

Forest, disturbed sites, roadsides, and stream banks. Coastal north from Tathra. Occasionally in the ranges north of Nowra.

Notes

Introduced shrub or tree to 5 m tall, hairless. Leaves alternating up the stems, 6-18 cm long, compound, with 6-10 leaflets, each 3-9 cm long, 15-35 mm wide, tips pointed, 3 or 4 glands between the lowest leaflet pairs. Flowers yellow, with 5 petals each 6-16 mm long. Flowers with 6 or 7 stamens that produce pollen. Flowers usually in clusters of 4-10 flowers. Flowers mainly Spring to Autumn.

Was Senna x floribunda.

Family was Caesalpiniaceae.

General Biosecurity Duty all NSW.

PlantNET description:  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Senna~septemtrionalis (accessed 7 February, 2021)