quadratiumbonatus Ritter
[Echinopsis quadratiumbonatus (Ritter) Hunt]
randallii Cárdenas
[Echinopsis formosa (Pfeiffer) Jacobi ex Salm-Dyck]
rhodotricha (K.Schumann) Fric
rhodotricha var. argentinensis (R.Meyer) Fric
rivierei (Backeberg) Krainz
riomizquiensis
Ritter FR 856
Hunt 1999 notes as illegal name.
Hunt gives as "Echinopsis sp."
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robinsoniana
(in Huntington Botanical Gardens)
[Backeberg 1959 mentions an Echinopsis robisoniana Werdermann being at the HBG.]
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rowleyi (Friedrich) Kiesling
[Echinopsis huascha (Weber) Friedrich & Rowley]
rubinghianus Backeberg
[Echinopsis thelegonoides (Spegazzini) Friedrich & Rowley]
santaensis Rauh & Backeberg
[Echinopsis santaensis (Rauh & Backeberg) Friedrich & Rowley]
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santiaguensis (Spegazzini) Backeberg
[Echinopsis spachiana (Lemaire) Friedrich & Rowley]
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schickendantzii (Weber) Britton & Rose
[Echinopsis schickendantzii Weber]
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schoenii Rauh & Backeberg
[Echinopsis schoenii (Rauh & Backeberg) Friedrich & Rowley]
scopulicola Ritter (FR 991)
[Backeberg's Lexicon claimed that no description was available but amended the spelling to T. scopulicolus)
[Echinopsis scopulicola (Ritter) Mottram]
entry
scopulicola var riomizquiensis Hort. NMCR
see comments concerning this name under the scopulicola entry
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serenanus Ritter
[Echinopsis coquimbana (Molina) Friedrich & Rowley]
shaferi Britton & Rose
[Echinopsis schickendantzii Weber]
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monstrose
skottsbergii Backeberg
[Echinopsis skottsbergii (Backeberg ex Skottsberg) Friedrich & Rowley]
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skottsbergii v. oreviatus Backeberg
[Echinopsis skottsbergii (Backeberg ex Skottsberg) Friedrich & Rowley]
smrzianus (Backeberg) Backeberg
[Echinopsis smrziana Backeberg]
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spachianoides Ritter FR 980
spachianus (Lemaire) Riccobono
[Echinopsis spachiana (Lemaire) Friedrich & Rowley]
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spinibarbis (Otto) Ritter
[Echinopsis spinibarbis (Pfeiffer) A.E.Hoffmann]
strigosus (Salm-Dyck) Britton & Rose
[Echinopsis strigosa (Salm-Dyck) Friedrich & Rowley]
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strigosus (SD) Britton & Rose var flaviflorus Ritter
superbus Ritter