Legume pictures advice from Charles Stirton
.... a sideview of a flower (detached if in a congested flower head) is like ^gold dust^ for naming species in the pea family. There are just so many yellow-flowered legumes that general pics are mostly only useful to get to genus level.
If it is easy for you to re-photograph this plant can you take and upload a picture of a detached flower side view on and also one with the wing petals removed so that one can see the keel (innermost pair covered by wing petals). The keel should be either ^shoe-shaped^ or more ^U-shaped^. If the anthers are of two types (5 long and 5 short) then we can confirm the genus at least. If it also has inflated pods (fruits) then it is certainly this genus. There is a possibility it might belong to the genus Argyrolobium which has forest species with very similar leaves and flowers but which have different fruits (long and flattened) and an almost 2-lipped calyx (best seen from side view of a flower) vs 5 distinct teeth in Crotalaria.
For legumes, one needs a detached flower (or if on the plant free from other flowers) and a side view of the flower has the most features. Unfortunately, unlike Australian peas, the front views are largely boring and uninformative. Also, a close-up of a detached leaf would be very helpful as the stipules, veining, hairiness, and stipules are all important identifying features.
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