The work is not signed, which is not uncommon.

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Margaret Stones
Pittosporum rhombifolium / - Floral Study, 1988
SOLD
watercolour on paper
52.50 x 37.50
signed on stem; titled and inscribed 'Pittosporum rhombifolium / Clarence R. to Proserpine, Queensland' l.l., & inscribed and dated 'Adelaide Botanic Garden Adelaide / Dec 7th 1988' l.r.
Literature & references:
Since its establishment in 1984, the Charles Nodrum Gallery’s exhibition program embraces a diversity of media and styles - from painting, sculpture & works on paper to graphics and photography; from figurative, geometric, gestural, surrealist & social comment to installation & conceptually based work.