These plants differ from enslenii in their more robust, long-trailing floricanes (ca. 1-3 mm thick versus 2.5-5 mm) and stouter prickles (ca. 0.5-2 mm long versus 1.5-3 mm), suggesting a transition to flagellaris. There is no clear difference in habitat or range, but these distinct plants are mapped here pending further taxonomic evaluation. An alternative name may be R. flagellaris Willd. var. humifusus (Torr. & Gray) Boivin (K).