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  4. Dracophyllum subulatum

Dracophyllum subulatum

Tongariro National Park.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Rangipo Desert, Tongariro National Park.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Dracophyllum subulatum.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Dracophyllum subulatum.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Flowers of Dracophyllum subulatum.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Kuratau.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
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Common name

monoao

Synonyms

Dracophyllum angustifolium Colenso

Family

Ericaceae

Authority

Dracophyllum subulatum Hook.f.

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Trees & Shrubs - Dicotyledons

NVS code

The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.

DRASUB

Chromosome number

2n = 26

Current conservation status

  • Conservation status of New Zealand indigenous vascular plants, 2017

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 | Not Threatened

Previous conservation statuses

2009 | Not Threatened

2004 | Not Threatened

Brief description

Erect grassy shrub with many thin twigs bearing narrow grass-like wavy leaves inhabiting the central North Island. Leaves 10-48mm long by 0.5-1.2mm wide. Flowers white, in short (less than 13mm long) clusters of 2-4 flowers at the end of twigs.

Distribution

Endemic. New Zealand: North Island (Central Volcanic Plateau and adjacent ranges from about Rotorua and Te Kuiti south to near Taihape)

Habitat

Dracophyllum subulatum is confined the the Central North Island Volcanic Plateau at altitudes of 100–1,220 m where it is associated with frost flats. It is virtually confined to pumiceous soils and rhyolitic tephra blanketing these. Dracophyllum subulatum is an important shrub of these habitats and where present it is usually dominant.

Features

A multi–stemmed shrub 0.3–2.0 m tall. Branches: bark on old branches grey, smooth, young stems reddish to purplish brown. Leaves dimorphic. Juvenile leaves spirally arranged along branches, spreading; lamina sheath 4.5–6.5 × 2.5–3.0 mm, shoulders truncate to auricled and margin membranous with the upper half ciliate; lamina 18–45 × 1–2 mm, linear to rarely linear–triangular, adaxial surface with a patch of scabrid hairs at base; margins serrulate with 70–80 teeth per 10 mm. Adult leaves erect to spreading, olive to dark green; lamina sheath 2.5–6.5 × 2.0–4.0 mm, subcoriaceous, shoulders rounded to auricled and margins membranous, ciliate; lamina 10.0–48.0 × 0.5–1.2 mm, linear to linear–subulate, surfaces glabrous with a tuft of scabrid hairs at base on adaxial surface; margins serrulate with 90–120 teeth per 10 mm; apex triquetrous. Inflorescence a terminal spike on lateral branches; shorter than leaves, erect, dense, 5.3–12.3 mm long, linear–oblong; inflorescence bract over-topping flowers, 4–6 × 0.5–0.6 mm, ovate–lanceolate at base; margins serrulate. Flowers 2–6, sessile; flower bracts equaling to longer than flowers, foliose, 3.5–7.8 × 1.7–2.0 mm, broadly ovate, with a tuft of scabrid hairs at the apex; margins with a prominent broad and white margin, serrulate. Sepals 2.6–3.2 × 0.6–1.2 mm, lanceolate to ovate–lanceolate, longer than corolla tube; adaxial surface pubescent or only the top half pubescent; margins ciliate. Corolla white to light pink; corolla tube 1.8–2.0 × 1.0–1.2 mm, cylindrical; corolla lobes spreading horizontally to reflexed, 1.0–1.5 × 0.8–1.0 mm, triangular, shorter than corolla tube; apices acute; adaxial surface papillate. Stamens inserted in corolla tube in the upper third, filaments 0.1–0.2 mm long; anthers included, rectangular, light yellow and 0.7–0.8 mm long. Ovary obovate, 0.8–1.0 mm long and wide, apex truncate; nectary scales 0.4–0.5 × 0.3–0.4 mm, rectangular, apices retuse; style included, 0.5–1.0 mm long, glabrous; stigma clavate. Fruit 2.9–3.0 × 1.7–1.8 mm, oblong; apex truncate, glabrous. Seeds 1.0–1.2 mm long, yellowish brown, filiform, testa prominently reticulate

Similar taxa

Dracophyllum subulatum is a North Island, Central Volcanic Plateau endemic. It is easily recognised by the slender branches, juvenile leaves, small (5.3–12.3 mm long) few flowered (2–6) inflorescences, flower bracts with a broad white margin, small corolla tubes (1.8–2.0 × 1.0–1.2 mm) and seeds with a prominently reticulate testa. Dracophyllum subulatum is perhaps most similar to D. palustre, certainly both species have the same white-margined flower bracts. From D. palustris D. subulatum differs in having juvenile leaves, and spicate inflorescences rather than solitary flowers. In D. subulatum the inflorescence bracts are notably longer than the flower not equaling them, they are also narrower (0.5–0.6 mm compared to 1.5–2.0 mm), while the sepals are longer and filiform rather than ovoid. The seed of D. subulatum is prominently reticulate while those of D. palustris are only slightly so.

Flowering

November – March

Flower colours

Green, White

Fruiting

January - May

Life cycle

Minute seeds are wind dispersed (Thorsen et al., 2009).

Propagation technique

Difficult - should not be removed from the wild

Threats

Not Threatened. However, as a distinct vegetation type Dracophyllum subulatum dominated frost flat vegetation has declined markedly over the last 100 years with much of its former range now converted to pine plantation or farmland. It could also be argued that this species is threatened by the spread of heather (Calluna vulgaris).

Etymology

dracophyllum: Dragon leaf, from its likeness to the dragon tree of the Canary Islands

subulatum: Awl-shaped

Where To Buy

Occasionally available from specialist native plant nurseries.

Attribution

Fact sheet prepared for NZPCN by P.J. de Lange (23 April 2012). Description adapted from Venter (2009)

References and further reading

Venter, S. 2009: A taxonomic revision of the genus Dracophyllum Labill. (Ericaceae). Unpublished Phd Thesis, Victoria University of Wellington, Wellington.

Thorsen, M. J.; Dickinson, K. J. M.; Seddon, P. J. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 11: 285-309

NZPCN Fact Sheet citation

Please cite as: de Lange, P.J. (Year at time of access): Dracophyllum subulatum Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/dracophyllum-subulatum/ (Date website was queried)

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