Raoulia grandiflora
| Raoulia grandiflora | |
|---|---|
| Raoulia grandiflora in Nelson Lakes National Park | |
| Scientific classification | |
| 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.
| |
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]
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 known 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]
References
- ^ a b c d e f "Raoulia grandiflora". New Zealand Plant Conservation Network. Retrieved 31 January 2025.
- ^ "Raoulia grandiflora (large-flowered mat daisy)". iNaturalist. Retrieved 31 January 2025.
- ^ a b c "Raoulia grandiflora Hook.f. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 31 January 2025.
- ^ "Raoulia grandiflora Hook.f. - Biota of NZ". Biota of NZ. 30 May 2006. Retrieved 1 February 2025.
- ^ a b c 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:10.20417/nzjecol.40.18. ISSN 0110-6465. JSTOR 26198745.
- ^ a b 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. Bibcode:1991NZJB...29..317W. doi:10.1080/0028825X.1991.10416610. ISSN 0028-825X.
- ^ 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. Bibcode:2003NZJB...41..719M. doi:10.1080/0028825X.2003.9512882. ISSN 0028-825X.