About 1 m high. Leaves 3-7 cm, mostly ~5 cm; 2-3 mm wide; very slightly sticky. 3 more bushes ~100 m away. Mt Painter Reserve Wildflower Triangle ridge. [Position on map corrected, 12 Dec 2021; was off by about 100 m.]
Yes seems like a good match to me, I definitely don't see this as C. longifolia. Just not 100% sure about hewsoniae being at that location, but given Cassinia's being very good colonisers its certainly possible
Yeah it has me puzzled at the moment, I know of 6 species of cassinia that have been recorded from the ACT at one point or another, and of those C.hewsoniae is really the only one that I can't rule out. I'll investigate further.