Coastal Restoration Trust of New Zealand

Coastal Dune Ecosystem Reference Database

Additional records and observations of monocotyledons naturalised or casual in Manawatu Ecological Region, New Zealand, 1980–2019. Journal Paper

Ogle, C.C.; La Cock, G.D.
Journal / Source
Perspectives in Biosecurity
Foxton Ecological District, Manawatu Plains Ecological District, Pātea, Whanganui, Hāwera, Koitiata, Castlecliff, Bomarea multiflora, Carex pendula, Freesia laxa, Gladiolus carneus, Phragmites karka, Adventive monocotyledon, Naturalised plant, Casual plant, weed
It has been 38 years since a comprehensive account of adventive monocotyledons in New Zealand was published, other than for grasses. This paper examines new adventive monocotyledon records from the Manawatu Ecological Region (MER), in the south-west of the North Island. Evidence is given for accepting five taxa as Naturalised and 64 as Casual. Of the Casual records, 36 are recorded in MER as New records for New Zealand. Three of the Naturalised taxa and 13 New Casual plant records are from the sand-country portion of MER, namely Foxton Ecological District (FED). Ten of the New Casual taxa have established from garden discards or plantings in dunes, two are recent garden escapes. Twenty-three New Casual plant records are from the marine terrace portion of MER (Manawatu Plains Ecological District, MPED), most being cultivation escapes within gardens. Several of these Casual taxa are sufficiently well established, in one or more sites, that it is likely they will naturalise in the future. In addition to New records, we include 33 Casual occurrences of monocotyledon taxa in MER, taxa which have been collected elsewhere in New Zealand, some of which have been published in reports or newsletters in the past.