| Harrisia aboriginum Small ex Britton & Rose |
Accepted |
 |
TRO |
| Harrisia adscendens (Gürke) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Harrisia balansae (K. Schum.) N.P. Taylor & Zappi |
Synonym |
 |
TRO |
| Harrisia bonplandii (Parm.) Britton & Rose |
Accepted |
 |
WCSP (in review) |
| Harrisia brookii Britton |
Synonym |
 |
TRO |
| Harrisia divaricata (Lam.) Lourteig |
Accepted |
 |
TRO |
| Harrisia donae-antoniae Hooten |
Synonym |
 |
TRO |
| Harrisia earlei Britton & Rose |
Unresolved |
 |
WCSP (in review) |
| Harrisia eriophora (hort. ex Pfeiff.) Britton |
Accepted |
 |
TRO |
| Harrisia fernowii Britton |
Unresolved |
 |
WCSP (in review) |
| Harrisia fimbriata (Lam.) F.M. Knuth |
Synonym |
 |
TRO |
| Harrisia fragrans Small ex Britton & Rose |
Accepted |
 |
TRO |
| Harrisia gracilis (Mill.) Britton |
Accepted |
 |
TRO |
| Harrisia guelichii (Speg.) Britton & Rose |
Synonym |
 |
TRO |
| Harrisia hahniana (Backeb.) Kimnach & Hutchison ex Kimnach |
Accepted |
 |
TRO |
| Harrisia hurstii W.T.Marshall |
Unresolved |
 |
WCSP (in review) |
| Harrisia jusbertii Fric |
Unresolved |
 |
WCSP (in review) |
| Harrisia jusbertii (Rebut ex K.Schum.) Borg |
Unresolved |
 |
WCSP (in review) |
| Harrisia martinii (Labour.) Britton |
Accepted |
 |
TRO |
| Harrisia nashii Britton |
Synonym |
 |
TRO |
| Harrisia perviridis (Weing.) Borg |
Unresolved |
 |
WCSP (in review) |
| Harrisia platygona (Otto) Britton & Rose |
Accepted |
 |
TRO |
| Harrisia pomanensis (F.A.C. Weber ex K. Schum.) Britton & Rose |
Accepted |
 |
TRO |
| Harrisia pomanensis subsp. bonplandii (Parm. ex Pfeiff.) Braun & Pereira |
Synonym |
 |
TRO |
| Harrisia pomanensis subsp. regelii (Weing.) R. Kiesling |
Accepted |
 |
TRO |
| Harrisia pomanensis subsp. tarijensis (F. Ritter) Braun & Pereira |
Synonym |
 |
TRO |
| Harrisia portoricensis Britton |
Synonym |
 |
TRO |
| Harrisia regelii (Weing.) Borg |
Synonym |
 |
TRO |
| Harrisia serruliflorus (Haw.) Lourteig |
Accepted |
 |
TRO |
| Harrisia simpsonii Small ex Britton & Rose |
Accepted |
 |
TRO |
| Harrisia taetra Areces |
Unresolved |
 |
WCSP (in review) |
| Harrisia taylorii Britton |
Synonym |
 |
TRO |
| Harrisia tetracantha (Labour.) D.R. Hunt |
Accepted |
 |
TRO |
| Harrisia tortuosa (J. Forbes ex Otto & A. Dietr.) Britton & Rose |
Accepted |
 |
TRO |
| Harrisia tortuosa var. uruguayensis Osten |
Unresolved |
 |
WCSP (in review) |
| Harrisia undata Britton |
Unresolved |
 |
WCSP (in review) |