Vascular – Exotic
Herbs - Dicotyledons other than Composites
Minute herb with wedge-shaped leaves around 1 cm long growing from underground parts, flower stalks much longer, usually around 10 cm long, with 1 to 4 pale mauve or white flowers with a distinct 2- lobed upper petal looking like rabbit ears to 1.5 cm long.
Only known from one site on the Coromandel Peninsula.
Seepage and trackside drain in regenerating manuka scrub.
Small perennial, terrestrial. Rhizoids few, capillary, simple. Stolons many, up to 5.0 cm or greater long, 0.25 mm thick. Leaves numerous, lamina up to 15 × 6 mm, cuneate or obovate to flabellate, petiolate. Traps numerous on rhizoids, stolons, and leaves, 1-1.5 mm long, ovoid, stalked. Inflorescences 2-6 cm long, erect, solitary, simple; peduncle c. 0.6 mm diam., terete, glabrous. Bracts c. 1 mm long, basifixed, deltoid or oblong. Flowers 1-4, distant; pedicels 1.5-3 mm long, spreading in flower, deflexed in fruit; calyx 2 mm long; corolla 10-15 mm long, very pale mauve or white, with darker mauve markings, upper lip of corolla deeply divided with two divergent lobes, spur subulate 2-3 x longer than lower lip. Capsule c. 2 mm long, globose, dehiscing by longitudinal slits. Apparently seed is not produced in naturalised populations.
No other so-called ‘terrestrial’ Utricularia species have the distinctive two lobed upper lip of the flower.
Deliberate planting and water borne dispersal of rhizome fragments
Reason for introduction
Not controlled in New Zealand.
utricularia: A small bladder
Factsheet prepared by Paul Champion and Deborah Hofstra (NIWA).
References and further reading
Heenan, P.B.; de Lange, P.J.; Cameron, E.K.; Ogle, C.C.; Champion, P.D. (2004). Checklist of dicotyledons, gymnosperms and pteridophytes naturalised or casual in New Zealand: additional records 2001-2003. New Zealand Journal of Botany 42: 797-814.