| Name | Dyckia microcalyx var. ostenii L. B. Smith |
| Authorship | L. B. Smith |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Dyckia microcalyx Baker |
| GUID | urn:lsid:ipni.org:names:86302-2 |
| Citation | 1934 Contr. Gray Herb. 104: 73 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Dyckia microcalyx var. ostenii L. B. Smith |
| Identification made in | [no date] (1) |
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