Gingidia is a genus of flowering plants in the family Apiaceae (the carrot family), order Apiales, comprising around 13 species native to New Zealand and southeastern Australia. The genus was formally revised by Heenan et al. (2013), who clarified its boundaries by segregating several Australian and New Zealand populations previously treated as part of Gingidia montana into distinct species.
Plants in the genus are perennial herbs, typically erect and non-rhizomatous, with fleshy petioles and once-pinnate, coriaceous to sub-fleshy leaves. The inflorescences are characteristic of the Apiaceae: compound umbels carrying small flowers grouped in simple umbels of 15-30 flowers each. Mericarps (the two-seeded fruit halves) are broadly winged - an adaptation for wind dispersal - and range in colour from dark brown to purple-brown.
The genus is centred on New Zealand, where most species are endemic and occupy habitats from lowland river banks and open grassland to subalpine cliff faces and rock outcrops up to 1300 m above sea level. Gingidia montana (mountain aniseed or New Zealand aniseed) is the most widespread and best-known species; it is the source of the genus name, which alludes to a Syrian carrot. Gingidia harveyana is the sole representative with a foothold in southeastern Australia.
Several NZ species have declined due to browsing pressure from introduced animals, as the foliage is highly palatable. Gingidia montana is now listed as At Risk - Declining under the New Zealand Threat Classification System, extinct over most of its North Island range and retreating in the South Island to inaccessible cliffs and roadsides largely free from browsing.
Etymology
The name gingidia derives from an ancient name for a Syrian carrot, reflecting the genus's placement in the carrot family Apiaceae. The epithet of the most prominent species, montana, comes from the Latin mons (meaning 'mountain'), indicating it grows on mountains.
Distribution
Gingidia is native to New Zealand and southeastern Australia. In New Zealand, species occur on both the North and South Islands, spanning lowland grassland, shrubland, and river banks up to subalpine rock outcrops (to ~1300 m). The sole Australian representative, G. harveyana, occurs in southeastern Australia. Most NZ species are endemic; G. montana has declined from much of its North Island range and is now largely confined to cliff faces and road-cut seepages free from browsing animals.
Ecology
Gingidia species occupy lowland to subalpine habitats including open grassland, shrubland, river banks, cliff faces, and rock outcrops. Winged mericarps facilitate wind dispersal. The foliage is highly palatable to introduced browsing mammals (livestock, deer), which has driven significant range contraction in several species, particularly G. montana.
Conservation
Gingidia montana is assessed as At Risk - Declining under the 2023 New Zealand Threat Classification System (qualifiers: DPR, DPS, DPT, PF), reflecting its extinction across most of its former North Island range and ongoing decline in the South Island. Populations persist mainly on inaccessible cliffs, rock outcrops, and road cuttings where browsing pressure is reduced. The 2013 revision by Heenan et al. also described new endemic species (G. amphistoma, G. grisea, G. haematitica) with restricted ranges, implying broader conservation concern for the genus.
Taxonomy Notes
The genus was substantially revised by Heenan, Telford, and Bruhl (2013), who demonstrated that Gingidia montana as previously circumscribed was not uniform: Australian plants were segregated as G. rupicola I.Telford & J.J.Bruhl, and two additional New Zealand species (G. amphistoma Heenan and G. haematitica Heenan) were split from it. Preliminary rDNA ITS analyses also suggest G. grisea is more closely allied to G. trifoliolata than to G. montana, indicating further phylogenetic structure within the genus.
