Flora of New Zealand Series

bladderwort

Glabrous aquatic; stems floating, up to 40 cm or more long, filiform, sparingly branched. Lvs numerous, submerged, multifid, 3-(4) cm long; segments capillary, to ± 1 cm long. Bladders numerous, (1)-2-3-(4) mm long, obliquely ovoid, attached by short stalk to near base of lf segments; mouth usually with 2 long setae. Scape rather stout, to c. 17 cm long, erect, 2-4-(5)-flowered; bracts c. 3 mm long, broad; pedicels to 17 mm long, slender. Calyx lobes oblong to elliptic. Corolla yellow; upper lip 3-lobed; lower entire, 7-9 mm wide, broad; palate protruded; spur short, obtuse. Capsule c. 1.5-2 mm diam., globose.

N.: lowland from c. 35° to 38° 30'.

Also indigenous to Eurasia and Australia.

In still water.

FL Jan-Mar.

As circumscribed here U. australis includes U. protrusa Hook. f., and U. mairii Cheeseman.