PROFILPELAJAR.COM

Acaena microphylla
Conservation status
	; Declining (NZ TCS)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Rosales
Family:	Rosaceae
Genus:	Acaena
Species:	A. microphylla
Binomial name
	Acaena microphylla; Hook.f.

Acaena microphylla, the bidibid or piripiri,^[4] and outside New Zealand, New Zealand-bur,^[5] is a small herbaceous, prostrate perennial flowering plant in the rose family Rosaceae, native to both the North and South Islands of New Zealand.^[2] There are two varieties:

Acaena microphylla var. pauciglochidiata Bitter^[6]
Acaena microphylla Hook.f var. microphylla^[4]

There are no synonyms.^[2]

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."^[3]

Taxonomy and naming

Acaena microphylla was first formally described in 1852 by Joseph Dalton Hooker.^[2]^[3] The genus name Acaena is derived from the ancient Greek word akaina, meaning "thorn" or "spine",^[7] 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".^[8]

Distribution

It is found on both the North Island and South Island of New Zealand.^[2]

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%).^[1] However, the variety Acaena microphylla var. microphylla was classified as "Not Threatened" in 2004, 2009 and 2012,^[4] and again in 2018.^[1]

References

^ ^a ^b ^c 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: 9, 53. OCLC 1041649797.
^ ^a ^b ^c ^d ^e "Acaena microphylla Hook.f. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 7 January 2020.
^ ^a ^b ^c 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. p. 55. This article incorporates text from this source, which is in the public domain.
^ ^a ^b ^c "Acaena microphylla var microphylla". New Zealand Plant Conservation Network. Retrieved 8 January 2020.
^ "Acaena microphylla Hook.f." www.gbif.org. Retrieved 7 January 2020.
^ "Acaena microphylla var. pauciglochidiata". New Zealand Plant Conservation Network. Retrieved 8 January 2020.
^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 796.
^ "microphyllus,-a,-um". www.plantillustrations.org. Retrieved 7 January 2020.