| Grusonia abyssi (Hester) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia acanthocarpa (Engelm. & J.M.Bigelow) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia aggeria (Ralston & Hilsenb.) E.F.Anderson |
Synonym |
 |
WCSP (in review) |
|
| Grusonia agglomerata (A.Berger) E.F.Anderson |
Synonym |
 |
WCSP (in review) |
|
| Grusonia alcahes (F.A.C.Weber) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia anteojoensis (Pinkava) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia aquosa (F.A.C.Weber) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia arbuscula (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
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| Grusonia bigelovii (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia blakeana (J.G.Ortega) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia bradtiana (Coult.) Britton & Rose |
Accepted |
 |
WCSP (in review) |
|
| Grusonia bulbispina (Engelm.) H.Rob. |
Synonym |
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WCSP (in review) |
|
| Grusonia californica (Torr. & A.Gray) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia caribaea (Britton & Rose) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia cereiformis K.Schum. |
Synonym |
 |
WCSP (in review) |
|
| Grusonia cholla (F.A.C.Weber) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia clavata (Engelm.) H.Rob. |
Synonym |
 |
WCSP (in review) |
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| Grusonia × congesta (Griffiths) G.D.Rowley |
Synonym |
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WCSP (in review) |
|
| Grusonia davisii (Engelm. & J.M.Bigelow) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia densispina (Ralston & Hilsenb.) Pinkava |
Accepted |
 |
TRO |
|
| Grusonia × deserta (Griffiths) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia diguetii (F.A.C.Weber) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia dumetorum (A.Berger) E.F.Anderson |
Synonym |
 |
WCSP (in review) |
|
| Grusonia echinocarpa (Engelm. & J.M.Bigelow) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia emoryi (Engelm.) Pinkava |
Synonym |
 |
WCSP (in review) |
|
| Grusonia fosbergii (C.B.Wolf) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia fulgida (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia ganderi (C.B.Wolf) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia grahamii (Engelm.) H.Rob. |
Synonym |
 |
WCSP (in review) |
|
| Grusonia hamiltonii W.T.Marshall |
Synonym |
 |
WCSP (in review) |
|
| Grusonia hystrix (Griseb.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia imbricata (Haw.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia invicta (Brandegee) E.F.Anderson |
Synonym |
 |
WCSP (in review) |
|
| Grusonia kellermanii (Rose) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia × kelvinensis (V.E.Grant & K.A.Grant) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia kleiniae (DC.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia kunzei (Rose) Pinkava |
Synonym |
 |
WCSP (in review) |
|
| Grusonia leptocaulis (DC.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia lindsayi (Rebman) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia marenae (S.H.Parsons) E.F.Anderson |
Synonym |
 |
WCSP (in review) |
|
| Grusonia moelleri (A.Berger) E.F.Anderson |
Synonym |
 |
WCSP (in review) |
|
| Grusonia molesta (Brandegee) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia munzii (C.B.Wolf) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia × neoarbuscula (Griffiths) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia parishii (Orcutt) Pinkava |
Synonym |
 |
WCSP (in review) |
|
| Grusonia porteri (Brandegee ex F.A.C.Weber) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia prolifera (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia pulchella (Engelm.) H.Rob. |
Synonym |
 |
WCSP (in review) |
|
| Grusonia ramosissima (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia reflexispina (Wiggins & Rollins) E.F.Anderson |
Synonym |
 |
WCSP (in review) |
|
| Grusonia robertsii Rebman |
Accepted |
 |
WCSP (in review) |
|
| Grusonia rosea (DC.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia rotundifolia (DC.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia sanfelipensis (Rebman) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia santamaria E.M.Baxter |
Synonym |
 |
WCSP (in review) |
|
| Grusonia schottii (Engelm.) H.Rob. |
Synonym |
 |
WCSP (in review) |
|
| Grusonia spinosior (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia stanlyi H.Rob. |
Synonym |
 |
WCSP (in review) |
|
| Grusonia tesajo (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia × tetracantha (Toumey) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia thurberi (Engelm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia tunicata (Lehm.) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia versicolor (Engelm. ex Toumey) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia verticillata (Vaupel) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia vilis (Rose) H.Rob. |
Synonym |
 |
WCSP (in review) |
|
| Grusonia × viridiflora (Britton & Rose) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia × vivipara (Rose) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia whipplei (Engelm. & J.M.Bigelow) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia wolfii (L.D.Benson) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|
| Grusonia wrightiana E.M.Baxter |
Synonym |
 |
WCSP (in review) |
|
| Grusonia zehntneri (Britton & Rose) G.D.Rowley |
Synonym |
 |
WCSP (in review) |
|