Echinocereus papillosus var. angusticeps (Clover) W.T.Marshall in: Marshall, W.T. & Bock, T.M., Cactaceae: 119. 1941.

Nomenclatural References

• person : Elzada Clover (1897-1980) Based on occurrence of standard abbreviation 'Clover' in the authors string.
• person : William Taylor Marshall (1886-1957) Based on occurrence of standard abbreviation 'W.T.Marshall' in the authors string.
• database : The Plant List version 1.0, record: kew-2782722
• database : The Plant List version 1.1, record: kew-2782722