| Status | D |
|---|---|
| Status system | NZTCS |
| Genus | Acaena |
| Species | microphylla |
| Authority | Hook.f.[1][2] |
Acaena microphylla, the bidibid or piripiri,[3] and outside New Zealand, New Zealand-bur,[4] is a small herbaceous, prostrate perennial flowering plant in the rose family Rosaceae, native to both the North and South Islands of New Zealand.[1] There are two varieties:
There are no synonyms.[1]
Description
Hooker describes it as "a very small and glabrous species; the leaflets not 1/4 in. long. Capitula very large for the size of the plant, upwards of an inch across, including the spines, which are not barbate, and distinguish it as a species."[2]
Taxonomy and naming
Acaena microphylla was first formally described in 1852 by Joseph Dalton Hooker.[1][2] The genus name Acaena is derived from the ancient Greek word akaina, meaning "thorn" or "spine",[6] referring to the spiny calyx of many species of Acaena. The specific epithet microphylla derives from the Greek words, mikros (small) and phyllon (leaf), to give an adjective meaning "small-leaved".[7]
Distribution
It is found on both the North Island and South Island of New Zealand.[1]
Conservation status
In 2013, the variety Acaena microphylla var. pauciglochidiata was classified as "At Risk - Naturally Uncommon" under the New Zealand Threat Classification System. By 2018, due to an actual decline, the status changed to "At Risk - Declining". (The area of occupancy had decreased to 100 km2 or less, and the predicted decline was 10 to 50%).[8] However, the variety Acaena microphylla var. microphylla was classified as "Not Threatened" in 2004, 2009 and 2012,[3] and again in 2018.[8]
References
- ^ "Acaena microphylla Hook.f. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2020-01-07.
- ^ Hooker, J.D. (1853). 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. Vol. 1, no. 2. p. 55.
- ^ "Acaena microphylla var microphylla". New Zealand Plant Conservation Network. Retrieved 2020-01-08.
- ^ "Acaena microphylla Hook.f.". www.gbif.org. Retrieved 2020-01-07.
- ^ "Acaena microphylla var. pauciglochidiata". New Zealand Plant Conservation Network. Retrieved 2020-01-08.
- ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 796.
- ^ "microphyllus,-a,-um". www.plantillustrations.org. Retrieved 2020-01-07.
- ^ 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 (2018-05-01). "Conservation status of New Zealand indigenous vascular plants, 2017". New Zealand Threat Classification Series. 22: 9, 53. OCLC 1041649797