It is not always easy to distinguish between bluebell species. There is variation within the one species, the size of the plant depends on seasonal conditions, and perennial species die off in hot summers, so that it can be difficult to decide whether the plant is an annual or not. Tall Bluebell (Wahlenbegia stricta) is by far the most common. Annual Bluebell (Wahlenbergia gracilenta) is moderately common. It is much smaller than Tall Bluebell.
Wahlenbergia - named in honour of the Swiss Botanist Goran Wahlenberg born 1780.
 Annual Bluebell  (Wahlenbergia gracilenta) Common. Annual. Hairy. Usually less than 30cm high.
Annual Bluebell  (Wahlenbergia gracilenta) Common. Annual. Hairy. Usually less than 30cm high. Yellowish Bluebell (Wahlenbergia luteola) Leaves very narrow. Outside of petals yellowish. Grassland plant.
Yellowish Bluebell (Wahlenbergia luteola) Leaves very narrow. Outside of petals yellowish. Grassland plant. Tall Bluebell (Wahlenbergia stricta) Very common bushland plant. Leaves mostly opposite, often crinkled.
Tall Bluebell (Wahlenbergia stricta) Very common bushland plant. Leaves mostly opposite, often crinkled.  Tufted Bluebell (Wahlenbergia communis) Tufted. Moderately common. Township.
Tufted Bluebell (Wahlenbergia communis) Tufted. Moderately common. Township.  Many-stemmed Bluebell (Wahlenbergia multicaulis) Usually much-branched. Petals relatively short. Uncommon.
Many-stemmed Bluebell (Wahlenbergia multicaulis) Usually much-branched. Petals relatively short. Uncommon.