| Author | (L.H.Bailey) Britton | |
| Distribution | Weakley (2023) pulls this taxon out from within R. flagellaris, where it has been previously lumped by most references, though NatureServe has R. invusus as a species -- based on BONAP -- with questionable taxonomy. Range is poorly known; SERNEC contains specimens only for the southern Mountains (Haywood and Macon) plus the foothills (McDowell). It likely is present in a number of other counties in these two provinces, but few botanists are probably even aware of this split.
"MA, NY, and IN south to sc. NC, ne. GA, and c. TN; apparently disjunct in s. MO" (Weakley 2023). | |
| Abundance | Unknown, though Weakley (2023) map shows as "rare" in the Mountains and Piedmont. The website editors suggest a State Rank of S2? for now. It is presumed to be overlooked among the abundant R. flagellaris. | |
| Habitat | Probably as R. flagellaris, being a species of old fields, edges, and thickets. | |
| Phenology | Probably blooms in April and May. | |
| Identification | This dewberry has "Leaf undersurface densely hairy, soft to the touch" (Weakley 2023), as opposed to "Leaf undersurface thinly hairy, not soft to the touch (when fully developed)" for R. flagellaris. | |
| Taxonomic Comments | More references have this taxon lumped within R. flagellaris than split out; Weakley (2023) moves it out to a separate species, but contains few details.
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| Other Common Name(s) | None | |
| State Rank | [S2?] | |
| Global Rank | GNA | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
