Raoulia monroi
Common names
fan-leaved mat daisy
Biostatus
Native – Endemic taxon
Category
Vascular
Structural class
Herbs - Dicotyledonous composites
Detailed description
Stems prostrate, creeping and rooting; final branchlets ascending; forming close to open flat patches. Leaves closely distichously arranged, 2–3 mm. long, linear-oblong to oblong-spathulate, obtuse, sometimes apiculate; basal portion 3-nerved, membranous, clad in appressed white tomentum; apical portion spreading, involute; ventral surface ± densely clad in matted tomentum; dorsal surface with appressed dense to sparse tomentum. Capitula up to 5 mm diameter. Inner series of involucral bracts 3–5 × c. 1 mm, linear-oblong, glabrous except for sparse hairs at tips, pale yellow-green, margins hyaline, obtuse tips usually dark brown. Florets ± 15, female 8–10. Achenes c. 1 mm long, papillate-pubescent; pappus-hairs slender, papillae very finely claviform, c. 3.5 mm long, not thickened at tips.
Similar taxa
Other Raoulia species. Leaves of R. monroi are arranged in one plane, in two rows along the stem.
Distribution
Endemic. New Zealand: South Island (Nelson, Marlborough, Canterbury and Otago).
Habitat
Lowland to upland open ground and rocky places, on river terraces and stabilised river gravel.
Current conservation status
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2022-2023 using the New Zealand Threat Classification System (NZTCS) – more information about this can be found on the NZTCS website. This report includes replaces all previous NZTCS lists for vascular plants. Previous assessments can be found here.
- Conservation status of vascular plants in Aotearoa New Zealand, 2023. 2024. Peter J. de Lange, Jane Gosden, Shannel P. Courtney, Alexander J. Fergus, John W. Barkla, Sarah M. Beadel, Paul D. Champion, Rowan Hindmarsh-Walls, Troy Makan and Pascale Michel Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.
2023 | At Risk – Declining | Qualifiers: Sp, DPT, PD, RR
Threats
As a lowland to montane species of dry, open ground this species is vulnerable to compeition from taller, more aggressive weed species. Although exact details are not yet available there is some evidence that suggests this species has been lost from some parts of its range and is actively declining in others.
Detailed taxonomy
Genus
Family
Synonyms
Raoulia cheesemanii Beauverd
Endemic taxon
Yes
Endemic genus
Yes
Endemic family
No
Ecology
Flowering
No information
Fruiting
No information
Propagation technique
Easily grown from rooted pieces. Likes freely draining soil and hot sunny conditions. Intolerant of humidity.
Other information
Etymology
raoulia: Named after Étienne Fiacre Louis Raoul (23 July 1815–30 March 1852) who was a French naval surgeon and naturalist. He published a book Choix de plantes de la Nouvelle-Zélande (“Selected plants of New Zealand”) in 1846. The genus was named after him by Joseph Hooker.
monroi: Named after Sir David Monro who was a 19th century New Zealand politician
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.
RAOMON
Chromosome number
2n = 28
Previous conservation statuses
The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2022-2023 using the New Zealand Threat Classification System (NZTCS) – more information about this can be found on the NZTCS website. This report includes replaces all previous NZTCS lists for vascular plants. Previous assessments can be found here.
- Conservation status of vascular plants in Aotearoa New Zealand, 2023. 2024. Peter J. de Lange, Jane Gosden, Shannel P. Courtney, Alexander J. Fergus, John W. Barkla, Sarah M. Beadel, Paul D. Champion, Rowan Hindmarsh-Walls, Troy Makan and Pascale Michel Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.
2017 | Threatened – Nationally Vulnerable | Qualifiers: DP, PD, RR, Sp
2012 | At Risk – Declining | Qualifiers: DP, RR, Sp
2009 | At Risk – Declining | Qualifiers: DP
2004 | Gradual Decline
Regional conservation statuses
Otago: 2024 | Threatened – Regionally Critical | Qualifiers: CD, DPS, DPT, NR, PF, RR
The regional threat classification system leverages off the national assessments in the NZTCS, providing information relevant for the regional context. Otago conservation status information is sourced from the “Regional conservation status of indigenous vascular plants in Otago” Jarvie S et al. (2024) report.
Referencing and citations
References and further reading
Allan HH. 1961. Flora of New Zealand, Volume I. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. Government Printer, Wellington, NZ. 1085 p.
Attribution
Description adapted from Allan (1961).
Some of this factsheet information is derived from Flora of New Zealand Online and is used under a Creative Commons Attribution 3.0 New Zealand licence.