Plants of South Eastern New South Wales
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Ranunculus pentandrus var. platycarpus
Common Avens, Smooth Buttercup, Inland Buttercup
Ranunculaceae
Intermittently moist sites and along inland watercourses. Western Slopes.
Annual herb to 0.4 m high, hairy to sparsely hairy. Stems usually branching. Leaves alternating up the stems, usually 0.7–2.5 cm long, 10-20 mm wide overall, hairless to hairy, with a translucent, usually hairy, sheath at the base. Juvenile leaves entire to broadly 3–5-lobed, later leaves compound, with 3 leaflets or dissected into 3 lobes, the leaflets or lobes sometimes again divided into 3, margins entire or toothed. Flowers pale yellow to white, with 1 or 2 petals 1.4–1.8 mm long, and 5 sepals 1.7-2 mm long. Flowers Jul.–Dec. Seeds usually 10–30, approximately round, 2–4 mm in diameter, strongly flattened, very thin, usually twisted at maturity, with small conical warts each bearing a curved hair scattered over the central half of the faces; and with a triangular beak 0.3–1 mm long.
PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Ranunculus~pentandrus (accessed 4 February, 2021)
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