Species Profile: Utricularia dichotoma subsp. novae-angliae

Species Profile: Utricularia dichotoma subsp. novae-angliae

Utricularia dichotoma subsp. novae-angliae is a bladderwort named after its range in the New England region of NSW, Australia. This subspecies of U. dichotoma grows in only six upland lagoons.

Like its relatives, this subspecies has a purple flower with a flared ‘skirt’ shaped lower corolla lip. The spur is wide and short, and about half the length of the lower corolla lip. The bracts are long with a sharp tip and gibbous base. The leaves are long with pointed tips, each with 1-3 veins.

The subspecies is endemic to shallow lagoons in the New England region at roughly 1000 m elevation. These lagoons are semi-permanent, drying out in years of drought. The plants grow on the grassy edges and bloom as the water level drops. Flowering occurs in the warmer months. I observed flowering in the month of May but this is probably an off-season event caused by the preceding La Nina weather conditions and warm autumn.

In these lagoons, the subspecies does not grow alongside other subspecies of U. dichotoma. The bracts are similar to U. dichotoma subsp. aquilonia which is common in the surrounding ranges but can be distinguished by its long leaves with sharp tips (those of aquilonia have rounded tips).

Front view of U. dichotoma subsp. novae-angliae
Side view of blooms. Note the short and broad spur.
Bracts of flower.
Leaves of plant. Nore the sharp tip.
Plants in habitat in an upland lagoon
A second known site of the species. The water level was too high when I visited (the foreground is a floating carpet of Myriophyllum).
Several plants had these unusual structures on their bracts. Perhaps adventitious stolons?
Close Menu