Raoulia grandiflora

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Raoulia grandiflora
Raoulia grandiflora - Richard Littauer - 464811992.jpeg
Raoulia grandiflora in Nelson Lakes National Park
Status NZTCS NT.svg
Not Threatened (NZ TCS) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Raoulia
Species:
R. grandiflora
Binomial name
Raoulia grandiflora
Hook.f. 1852

Raoulia grandiflora, or the large-flowered mat daisy, [1] is a species of flowering plant from the South Island of New Zealand. [2] [3] [1]

Contents

Description

A small, sessile flowering plant with white flowers.

Stems woody at base, much-branched; branches and branchlets densely to rather loosely arranged, the plant forming cushions or mats up to c. 15 cm. diam., occ. of more open habit. Lvs densely imbricate, 5-10 × 1-2 mm., 3-nerved, ovate-lanceolate-spathulate, tapering to subacute tip, clad in upper part on both surfaces in appressed silvery tomentum, loosely tomentose near base. Capitula up to 1·5 cm. diam.; inner phyll. linear, contracted near middle, obtuse, with conspicuous white radiate tips up to c. 5 mm. long. Florets 25-45; ♀ 8-15 with narrow slender corolla, perfect with funnelform corolla. Stylopodium prominent. Achenes < 1 mm. long, clad in silky hairs; pappus-hairs c. 5 mm. long, stiff, slightly thickened at tips. [4]

Range

While some authorities consider it only a South Island species, [3] it can also be found on the North Island south of Mt. Hikurangi in suitable habitat. [1]

Habitat

This plant is found in subalpine or subarctic biomes. [3] Normally, it is in mountainous areas, found among rocks or near scree fields. [1] It is also found in tussock areas and gravel fields. [5]

Ecology

This species often appears in scree fields where tussock mats leave openings. [6] It can be found in communities with Anisotome aromatica, Celmisia laricifolia, and Cyathodes dealbata. In small hollows that accumulate water with a sandy substrate, it can be found in colluvium with Epilobium pernitens, Carpha alpina, Oreomyrrhis colensoi, and Viola cunninghamii. [6] In tussockland it associates with Chionochloa crassiuscula and Celmisia haastii, and it can also be found in gravel areas where as much as 90% of the area is rock. [5] In gravel fields it is know to associate with Veronica pulvinaris, Anisotome imbricata, and Dracophyllum pronum. [5]

Etymology

grandiflora means 'large flowers' in Latin. [1]

Taxonomy

R. grandiflora is a member of the Asteraceae. It has been known to hybridize with Raoulia bryoides. [7]

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<i>Myosotis pulvinaris</i> Species of flowering plant

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References

  1. 1 2 3 4 5 6 "Raoulia grandiflora". New Zealand Plant Conservation Network. Retrieved 31 January 2025.
  2. "Raoulia grandiflora (large-flowered mat daisy)". iNaturalist. Retrieved 31 January 2025.
  3. 1 2 3 "Raoulia grandiflora Hook.f. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 31 January 2025.
  4. "Raoulia grandiflora Hook.f. - Biota of NZ". Biota of NZ. 30 May 2006. Retrieved 1 February 2025.
  5. 1 2 3 Wiser, Susan K.; Thomson, Fiona J.; De Cáceres, Miquel (2016). "Expanding an existing classification of New Zealand vegetation to include non-forested vegetation". New Zealand Journal of Ecology. 40 (1): 160–178. doi:10.2307/26198745. ISSN   0110-6465.
  6. 1 2 Williams, P. A. (1 July 1991). "Subalpine and alpine vegetation of granite ranges in western Nelson, New Zealand". New Zealand Journal of Botany. 29 (3): 317–330. doi:10.1080/0028825X.1991.10416610. ISSN   0028-825X.
  7. McKenzie, Robert J.; Ward, Josephine M.; Murray, Stuart M. (1 December 2003). "A natural hybrid between Raoulia bryoides and R. grandiflora (Compositae‐Gnaphalieae) from Mt St Patrick, Canterbury, New Zealand". New Zealand Journal of Botany. 41 (4): 719–723. doi:10.1080/0028825X.2003.9512882. ISSN   0028-825X.