Xeronema callistemon f. callistemon
Poor Knights Lily, Raupo-Taranga
Xeronema callistemon W.R.B.Oliv., Xeronema callistemon W.R.B.Oliv. var. callistemon
Vascular – Native
2n = 34, 36
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2017 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants. Authors: By Peter J. de Lange, Jeremy R. Rolfe, John W. Barkla, Shannel P. Courtney, Paul D. Champion, Leon R. Perrie, Sarah M. Beadel, Kerry A. Ford, Ilse Breitwieser, Ines Schönberger, Rowan Hindmarsh-Walls, Peter B. Heenan and Kate Ladley.
2012 | At Risk – Naturally Uncommon | Qualifiers: CD, IE, RR
Previous conservation statuses
2009 | At Risk – Naturally Uncommon | Qualifiers: IE
2004 | Range Restricted
Endemic. Only known from the Poor Knights Islands near Tutukaka, and from Hen (Taranga) Island,near Whangarei. Xeronema belongs to a newly established family of one genus with two species, the Xeronemataceae.
Rhyolite sea cliffs and rock outcrops. Occasionally in forest on rubble or as an epiphyte on pohtukawa (Metrosideros excelsa). These latter occurrences probably stem from fallen plants captured in trees or resprouting on the forest floor.
Forming huge colonies 1-4 m across. Leaves green to yellow-green, arising from thick rhizomes, and forming flattened fans, 60-150 x 3-5 cm, Dead leaves long persistent, ultimately detached from the frayed base to form a fibrous mass. Inflorescences on green, thick, leafy stems (peduncle) up to 1 m. Racemes 10-60 cm long, aligned vertically on upper side of peduncle. Flowers crowded, numerous. Flower stalks (pedicels) 1-15 mm long, subtended by an pale green translucent leafy bract, which is obviously shorter than the buds. Flowers red, tepals 10-15 mm, outer 3 mm wide, inner 1.5 mm. Stamen filaments twice length of tepals, anthers 4 mm long, pollen tangerine-orange. Ovary 4 x 2 mm, oblong-3-angled, covered with copious nectar. Capsule 9-11 mm. Seeds ovate, 1.6 x 1 mm, black.
None in New Zealand. Similar to X. moorei of New Caledonia (the only other species of the genus, and family), which differs in some floral and capsule details, and by the seed size and shape. X. callistemon f. callistemon differs from f. bracteosa only in one character, the much shorter pale green to translucent floral bracts, which are shorter than the emerging flower buds.
September to December, peaking in October.
November to January.
Very easy from divisions of whole plants, and seed. But seed must be fresh, and though germinating easily can take 10-15 years to reach flowering size. Xeronema is best grown in a long narrow pot, within a free draining mix of rock chips and compost. Plants should be watered frequently, and frequently fertilised with sea weed, manure, or high phosphate/nitrogen garden fertilisers. They should be allowed to become root bound (or they will not flower), and need high sunlight. Plants are very cold sensitive, dying in even mild frosts.
None. The specie sis liste donly because it is endemic to two very small island archipelago.
xeronema: From the Greek xeros ‘dry’ and nema ‘thread’
callistemon: With a beautiful stamen
Where To Buy
Becoming more common in cultivation, and easily obtained from most garden centres.
Fact Sheet prepared for NZPCN by P.J. de Lange 1 October 2004. Description based on Moore & Edgar (1970) supplemented by observations obtained from fresh specimens and herbarium material (see also de Lange & Cameron 1999).
References and further reading
de Lange, P.J.; Cameron, E.K. 1999: The vascular flora of Aorangi Island, Poor Knights Islands, northern New Zealand. New Zealand Journal of Botany 37: 433-468.
Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Wellington, Government Printer.
Please cite as: de Lange, P.J. (Year at time of access): Xeronema callistemon f. callistemon Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/xeronema-callistemon-f-callistemon/ (Date website was queried)