| Name | Clematis clarkeana var. stenophylla Handel-Mazzetti |
| Authorship | Handel-Mazzetti |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Clematis clarkeana H. Léveillé & Vaniot |
| Citation | 1939 Acta Horti Gothob. 13: 194 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Clematis clarkeana var. stenophylla Handel-Mazzetti |
| Identification made in | [no date] (1) |
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