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|lifespan=perennial
|lifespan=perennial
|life_ref=Flora - A Gardener's Encyclopedia
|life_ref=Flora - A Gardener's Encyclopedia
|features=evergreen
|features=evergreen, invasive
|Temp Metric=°F
|Temp Metric=°F
|jumpin=If this plant info box on watering; zones; height; etc. is mostly empty you can click on the edit tab and fill in the blanks!
|jumpin=If this plant info box on watering; zones; height; etc. is mostly empty you can click on the edit tab and fill in the blanks!
|image=Upload.png
|image=Acaena novae-zelandiae1.jpg
|image_width=240
|image_width=240
|image_caption=''[[Acaena novae-zelandiae]]'' foliage and various fruiting stages
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'''''Acaena''''' is a genus of about one hundred species of [[perennial plant|perennial]] [[herb]]s and [[subshrub]]s in the [[Rosaceae]], native mainly to the [[Southern Hemisphere]], notably [[New Zealand]], [[Australia]] and [[South America]], but with a few species extending into the [[Northern Hemisphere]], north to [[Hawaii|Hawai{{okina}}i]] (''A. exigua'') and [[California]] (''A. pinnatifida'').
| common_names = <!--- if multiple, list all, if none, leave blank -->
The [[leaf|leaves]] are alternate, {{convert|4|-|15|cm|in}} long, and pinnate or nearly so, with 7-21 [[leaflet]]s. The [[flower]]s are produced in a tight globose [inflorescence] {{convert|1|-|2|cm|in}} in diameter, with no petals. The [[fruit]] is also a dense ball of many [[seed]]s; in many (but not all) species the seeds bear a barbed arrowhead point, the seedhead forming a [[burr (fruit)|burr]] which attaches itself to [[animal]] [[fur]] or [[feather]]s for dispersal.
| high = ? <!--- 1m (3 ft) -->
Several ''Acaena'' species in New Zealand are known by the common name '''bidibid'''. The word is written variously ''biddy-biddy'', ''biddi-biddi'', ''biddi-bid'' and a number of other variations. These names are the English rendition of the original Māori name of ''piripiri''.<ref>Orsman, H. W. (1999). ''The Dictionary of New Zealand English''. Auckland: Oxford University Press.</ref>
| origin = ? <!--- Mexico, S America, S Europe, garden, etc -->
| poisonous = <!--- indicate parts of plants which are known/thought to be poisonous -->
| lifespan = <!--- perennial, annual, etc -->
| exposure = ? <!--- full sun, part-sun, semi-shade, shade, indoors, bright filtered (you may list more than 1) -->
| water = ? <!--- frequent, regular, moderate, drought tolerant, let dry then soak -->
| features = <!--- flowers, fragrance, fruit, naturalizes, invasive -->
| bloom = <!--- seasons which the plant blooms, if it is grown for its flowers -->
{{Inc|
{{Inc|
Acaena (from Greek word signifying thorn). Rosaceae. New Zealand Bur. Trailing, more or less evergreen plants used in rockwork and as ground cover under trees and between other plants.
Acaena (from Greek word signifying thorn). Rosaceae. New Zealand Bur. Trailing, more or less evergreen plants used in rockwork and as ground cover under trees and between other plants.
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*''Acaena adscendens''
*''[[Acaena adscendens]]'' <small></small>
*''Acaena anserinifolia''
*''[[Acaena anserinifolia]]'' <small></small>
*''Acaena argentea''
*''[[Acaena argentea]]'' <small></small>
*''Acaena buchananii''
*''[[Acaena buchananii]]'' <small></small>
*''Acaena caesiiglauca''
*''[[Acaena caesiiglauca]]'' <small></small>
*''Acaena exigua'' - Liliwai
*''[[Acaena dumicola]]'' <small>[[Bryony Macmillan|Macmillan]], 1985</small> ([[South Island]] of [[New Zealand]])
*''Acaena fissistipula''
*''[[Acaena emittens]]'' <small>Macmillan, 1989</small> ([[North Island]] of New Zealand)
*''Acaena glabra''
*''[[Acaena exigua]]'' <small>[[Asa Gray|A.Gray]]</small> - ''Liliwai'' ([[Hawaii|Hawai{{okina}}i]])
*''Acaena inermis''
*''[[Acaena fissistipula]]'' <small></small>
*''Acaena laevigata''
*''[[Acaena glabra]]'' <small></small>
*''Acaena lucida''
*''[[Acaena inermis]]'' <small></small>
*''Acaena magellanica''
*''[[Acaena juvenca]]'' <small>Macmillan, 1989</small> (New Zealand)
*''Acaena microphylla''
*''[[Acaena laevigata]]'' <small></small>
*''[[Acaena lucida]]'' <small></small>
*''[[Acaena magellanica]]'' <small></small>
*''[[Acaena microphylla]]'' <small></small>
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*''Acaena myriophylla''
*''[[Acaena myriophylla]]'' <small></small>
*''[[Acaena novae-zelandiae]]'' - [[bidibid]]
*''[[Acaena novae-zelandiae]]'' <small>Kirk</small> - Bidibid (New Zealand)
*''Acaena ovalifolia''
*''[[Acaena ovalifolia]]'' <small></small>
*''Acaena ovina''
*''[[Acaena ovina]]'' <small></small>
*''Acaena pallida'' - Sand [[bidibid]]
*''[[Acaena pallida]]'' <small>(Kirk) Allen</small> - Sand bidibid
*''Acaena pinnatifida'' - Sheepburr
*''[[Acaena pinnatifida]]'' <small>Ruiz & Pav.</small> - Sheepburr
*''Acaena platyacantha''
*''[[Acaena platyacantha]]'' <small></small>
*''Acaena pumila''
*''[[Acaena pumila]]'' <small></small>
*''Acaena saccaticupula''
*''[[Acaena rorida]]'' <small>Macmillan, 1991</small> (North Island of New Zealand)
*''Acaena sanguisorbae''
*''[[Acaena saccaticupula]]'' <small></small>
*''Acaena sericea''
*''[[Acaena sanguisorba]]e'' <small></small>
*''Acaena splendens''
*''[[Acaena sericea]]'' <small></small>
*''Acaena trifida''
*''[[Acaena splendens]]'' <small></small>
*''[[Acaena tesca]]'' <small>Macmillan, 1991</small> (South Island of New Zealand)
*''[[Acaena trifida]]'' <small></small>
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