• Acaena Mutis ex Linnaeus, 1771 [Family: Rosaceae]
• Acaena Treitschke, 1825 (uncertain) [Family: Lepidoptera (awaiting allocation)]
• Acaena acrobyssina Bitter
• Acaena acroglochin Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena aculeata Meyen
• Acaena acutifida Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena adenocarpa Bitter accepted as Acaena splendens Hook. & Arn.
• Acaena adscendens Vahl accepted as Acaena magellanica (Lam.) Vahl
• Acaena affinis Hook. f. accepted as Acaena magellanica (Lam.) Vahl
• Acaena agnipila Gand.
• Acaena agrimonioides Kunth accepted as Acaena elongata Linnaeus
• Acaena alboffii Macloskie accepted as Acaena magellanica (Lam.) Vahl
• Acaena alpina Poepp. ex Walp.
• Acaena andicola Gillies ex Walp.
• Acaena andina Phil.
• Acaena anserinacea Bitter
• Acaena anserinella Bitter accepted as Acaena stricta Griseb.
• Acaena anserinifolia (J.R. Forst. & G. Forst.) Domin
• Acaena anserinifolia (J.R. Forst. & G. Forst.) Druce
• Acaena anserinifolia auct. accepted as Acaena novae-zelandiae Kirk
• Acaena anserovina Orchard
• Acaena antarctica Hook. f.
• Acaena aquatica Linnaeus
• Acaena argentea Bertero ex Steud.
• Acaena argentea Ruiz & Pav.
• Acaena arthrotricha Bitter accepted as Acaena pinnatifida Ruiz & Pav.
• Acaena asthenoglochin Bitter
• Acaena australis (Salisb.) Britten
• Acaena basibullata Bitter
• Acaena behriana Schltdl.
• Acaena berteriana Bernh.
• Acaena boliviana Gand.
• Acaena brachyglochin Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena brunnescens Bitter
• Acaena buchananii Hook. f.
• Acaena cadilla Hook. f.
• Acaena caesiiglauca (Bitter) Bergmans
• Acaena caespitosa Gillies ex Hook. & Arn.
• Acaena calcitrapa Phil.
• Acaena californica Bitter accepted as Acaena pinnatifida Ruiz & Pav.
• Acaena calvivagina Bitter
• Acaena canescens Phil. accepted as Acaena magellanica (Lam.) Vahl
• Acaena capitata Phil.
• Acaena chamacaena Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena chamaegeron Bitter accepted as Acaena caespitosa Gillies ex Hook. & Arn.
• Acaena chubutensis Bitter accepted as Acaena caespitosa Gillies ex Hook. & Arn.
• Acaena closiana Gay
• Acaena colchaguensis Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena compacta Hauman accepted as Acaena magellanica (Lam.) Vahl
• Acaena confertissima Bitter
• Acaena coxi Phil.
• Acaena craspedotricha Bitter
• Acaena cunctatrix Bitter
• Acaena cuneata Hook. & Arn. accepted as Acaena sericea J. Jacq.
• Acaena cylindristachya Ruiz & Pav.
• Acaena decumbens (G. Forst. ex Gaertn.) D.W.H. Walton
• Acaena decumbens (L. f.) Druce
• Acaena decumbens Menzies
• Acaena denudata Reiche
• Acaena depauperata Bitter
• Acaena depressa Kirk
• Acaena dieckii Bitter
• Acaena digitata Phil.
• Acaena dimorphoglochin Bitter
• Acaena distichophylla Bitter
• Acaena dolichanthera Bitter
• Acaena dumicola B.H. Macmill.
• Acaena dumulosa Gand.
• Acaena echinata Nees
• Acaena eglochidiata Bitter
• Acaena elegans Gay accepted as Acaena ovalifolia Ruiz & Pav.
• Acaena elongata Linnaeus
• Acaena emittens B.H. Macmill.
• Acaena euacantha Phil.
• Acaena eupatoria Cham. & Schltdl.
• Acaena exaltata Bitter
• Acaena exigua A. Gray
• Acaena fissistipula Bitter
• Acaena floribunda Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena frondosibracteata Bitter
• Acaena fuegina Phil. accepted as Acaena sericea J. Jacq.
• Acaena fuscescens Bitter
• Acaena glaberrima Phil.
• Acaena glabra Buchanan
• Acaena glandulifera Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena glaucella Bitter accepted as Acaena magellanica (Lam.) Vahl
• Acaena glaucophylla Bitter
• Acaena gracillima Bitter
• Acaena grahamiana Gillies ex Walp.
• Acaena grandistipula Bitter
• Acaena grossifolia Bitter
• Acaena heptandra Dombey ex Bitter
• Acaena hieronymi Kuntze accepted as Acaena myriophylla Lindl.
• Acaena hirsuta Phil. accepted as Acaena ovalifolia Ruiz & Pav.
• Acaena hirsutula Bitter
• Acaena hirta Citerne
• Acaena humilis Bitter
• Acaena huttonii R. Br. bis
• Acaena hystrix Chodat & Wilczek
• Acaena incisa Lindl.