Ranunculus sessiliflorus var. sessiliflorus

Family Ranunculaceae

Buttercup

Short lived ephemeral herb, with flowering stems to 20 cm long. Longevity to 4 months.

Flowers: Tiny, pale yellow, autumn - spring.

Fruit: Head of achenes, September–October.

Seed: 2 mm long, pale brown.  Locally dispersed, possibly in mud on hoofs etc. Strong dormancy, soil stored seedbank. Good germination following drought breaking rain.

Gallery images: seed, seedling, rootstock, resprout

Ecology

  • Woodland habitat in semi shade to full sun.
  • Periods of episodic recruitment  in woodland at the Australian Botanic Garden during suitable seasons.
  • Local seedling densities may be very high.
  • There may be several years between seasons.
  • Plants may seed readily even at high densities.
  • Inadequate rainfall events may stimulate germination but seedlings may fail to reach maturity, depleting the soil stored seedbank.

Ecology of Cumberland Plain Woodland

Ranunculus sessiliflorus plant

Ranunculus sessiliflorus flower

Ranunculus sessiliflorus fruit

Ranunculus sessiliflorus seed