Abrotanella rosulata

Abrotanella rosulata is a plant in the family Asteraceae, endemic to the Campbell Islands.[4]

Abrotanella rosulata

Naturally Uncommon (NZ TCS)[1]
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Abrotanella
Species:
A. rosulata
Binomial name
Abrotanella rosulata
(Hook.f.) Hook.f.[2][3]
Synonyms[4]

Ceratella rosulata Hook.f.

Description

Hooker describes it[3] as "a small, densely tufted, moss-like herb", with stems that are 1–1.5 inches (2.5–3.8 cm) high. The leaves overlap, and are recurved, rigid, and leathery. They are 1/4-1/3 in long, narrow ovate or lanceolate, acute, concave above. The flower heads are aggregated amongst the upper leaves and 1/10 in long. There are 8-10 involucral scales which are linear oblong, and leathery with translucent veins. The male flower has a four-angled corolla, and the angles are translucent. The female flower has a tubular corolla, and is four-toothed. The achene is four-angled.[3]

Taxonomy

It was first described in 1844 as Ceratella rosulata by Joseph Dalton Hooker who found it in the Campbell Islands, "in crevices of rocks at the tops of the mountains, at an elevation of 1400 feet",[5] but in 1864 he amended the genus to Abrotanella.[3]

Conservation status

In 2009 and 2012, it was declared "At Risk - Naturally Uncommon" under the New Zealand Threat Classification System.[6] In 2018 its status remained as "At Risk - Naturally Uncommon" due to its restricted range.[1]

References
  1. Lange, Peter J. de; Rolfe, Jeremy R.; Barkla, John W.; Courtney, Shannel P.; Champion, Paul D.; Perrie, Leon R.; Beadel, Sarah M.; Ford, Kerry A.; Breitwieser, Ilse; Schönberger, Ines; Hindmarsh-Walls, Rowan (1 May 2018). "Conservation status of New Zealand indigenous vascular plants, 2017" (PDF). New Zealand Threat Classification Series. 22: 39. OCLC 1041649797.
  2. "NZOR Name Details - Abrotanella rosulata (Hook.f.) Hook.f." www.nzor.org.nz. Retrieved 10 January 2020.
  3. Hooker, J.D. (1864) Handbook of the New Zealand flora : a systematic description of the native plants of New Zealand and the Chatham, Kermadec's, Lord Auckland's, and Macquarrie's islands /: 139
  4. "Abrotanella rosulata Hook.f. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 10 January 2020.
  5. Hooker, J.D. (1844) The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror in the Years 1839-1843: under the command of Captain Sir James Clark Ross: 1: 25, t. 18
  6. "Abrotanella rosulata | New Zealand Plant Conservation Network". www.nzpcn.org.nz. Retrieved 10 January 2020.


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