Hedychium Flavescens

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Hedychium flavescens COMMON NAME Yellow ginger FAMILY Zingiberaceae AUTHORITY Hedychium flavescens Roscoe FLORA CATEGORY Vascular – Exotic STRUCTURAL CLASS Herbs - Monocots HABITAT Terrestrial. Coastal and lowland habitats. Scrub, forest margins and clearings, roadsides and wastelands. Hedychium flavescens. Photographer: John FEATURES Smith-Dodsworth Non-woody perennial to 2.5 m tall, ginger-scented. Rhizomes massive, taro-like, close to ground surface, long, shallow rooted, much-branched, growing over each other forming deep beds. Rhizome segments 4 x 10 cm, each producing an aerial stem usually annually. Stems to 2.5 m, erect, soft, unbranched, thickening to short pinkish collar at base. Leaves alternate, 50 x 10 cm, shiny, pointing upwards. Flowerhead 15 x 10 cm with flowers overlapping in cone-like clusters, cream-coloured, May-Jun. No fruit produced. SIMILAR TAXA Hedychium gardnerianum (wild ginger) has an open inflorescence, but is difficult to distinguish on vegetative parts alone. H. gardnerianum has shortly petiolate leaves with a small ligule to 1.5 cm. H. flavescens has sessile leaves and a ligule 3.5-5cm long. There are other Hedychium species cultivated, and sparingly naturalised. In particular H. coronarium (white ginger) is very similar but has white rather than cream flowers. Other similar species are Canna sp. and culinary Ginger (Zingiber sp.) FLOWERING March, April, May, June, July FLOWER COLOURS A picture of Hedychium flavescens. Cream, Yellow Photographer: Nic Singers YEAR NATURALISED 1898 ORIGIN Himalayas ETYMOLOGY flavescens: Pale yellow Reason For Introduction Ornamental Life Cycle Comments Perennial. The hermaphrodite flowers are sterile (Landcare Research 4/1993; Timmins & MacKenzie 1995). Reproduction Reproduces vegetatively from short, stout rhizomes. Seed Fruit not seen in New Zealand. Dispersal Rhizomes spread slowly outwards. New infestations caused by flooding, soil movement, dumped vegetation, contaminated machinery. Tolerances Tolerant of poor drainage and semi-shade and slightly tolerant of drought. Physical damage to rhizome causes multiplication. Requires medium to high soil fertility. MORE INFORMATION https://www.nzpcn.org.nz/flora/species/hedychium-flavescens/.

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