2006, Uruguay, Rivera
2008, Brazil, Rio Grande do Sul, Aceguá, A&M 269 Show on map
2011, Brazil, Rio Grande do Sul, west of Unistalda, A&M 762 Show on map
2011, Brazil, Rio Grande do Sul, west of Unistalda, A&M 764 Show on map
2011, Brazil, Rio Grande do Sul, São Francisco de Assis, A&M 772 Show on map
2011, Brazil, Rio Grande do Sul, São Francisco de Assis, A&M 776 Show on map
2011, Brazil, Rio Grande do Sul, São Francisco de Assis, A&M 784 Show on map
2011, Brazil, Rio Grande do Sul, Santana da Boa Vista, A&M 798 Show on map
2011, Brazil, Rio Grande do Sul, Piratini, A&M 800 Show on map
2016, Brazil, Rio Grande do Sul, Encruzilhada do Sul, A&M 1345 Show on map
2016, Brazil, Rio Grande do Sul, Alegrete, A&M 1359 Show on map
Synonyms
Cactus ottonis*, Echinocactus ottonis, Malacocarpus ottonis, Notocactus ottonis, Peronocactus ottonis, Echinocactus arechavaletae, Malacocarpus arechavaletae, Notocactus arechavaletae, Notocactus campestrensis, Notocactus glaucinus var. depressus, Notocactus eurypleurus, Parodia glaucina, Notocactus glaucinus, Notocactus globularis, Notocactus gracilis, Parodia oxycostata ssp. gracilis, Notocactus oxycostatus ssp. gracilis, Peronocactus oxycostatus ssp. gracilis, Notocactus glaucinus var. gracilis, Notocactus grandiensis, Parodia nothominuscula ssp. gravior, Notocactus harmonianus, Notocactus ottonis ssp. horstii, Parodia ottonis ssp. horstii, Peronocactus ottonis ssp. horstii, Notocactus arechavaletae var. horstii, Notocactus incomptus, Notocactus miniatispinus, Notocactus securituberculatus var. miniatispinus, Notocactus minusculus, Peronocactus minusculus, Parodia nothominuscola, Notocactus ottoianus, Parodia paraguayensis, Notocactus ruoffii, Notocactus securituberculatus, Echinocactus tenuispinus, Notocactus tenuispinus, Echinocactus tortuosus, Notocactus uruguayus, Echinocactus ottonis var. uruguayus
* Basionym
Distribution
Argentina (Corrientes, Entre Ríos, Misiones), Brazil (Rio Grande do Sul), Paraguay, Uruguay
Conservation status
Comments
Genus
Other species
alacriportana
allosiphon
aureicentra
ayopayana
buiningii
calvescens
carambeiensis
chrysacanthion
claviceps
columnaris
comarapana
commutans
concinna
crassigibba
curvispina
erinacea
fusca
gaucha
haselbergii
hausteiniana
hegeri
herteri
horrida
horstii
ibicuiensis
langsdorfii
lenninghausii
linkii
maassii
magnifica
mairanana
maldonadensis
mammulosa
microsperma
mueller-melchersii
muricata
neobuenekeri
neohorstii
nigrispina
nivosa
nothorauschii
ocampoi
otaviana
ottonis
oxycostata
prestoensis
procera
rechensis
ritteri
schumanniana
schwebsiana
scopa
stockingeri
stuemeri
subterranea
taratensis
tenuicylindrica
tuberculata
warasii
werdermanniana