Rubus adenocaulis explained

Rubus adenocaulis is a rare North American species of flowering plant in the rose family. It has been found only in the Province of Nova Scotia in the eastern Canada.^{[1] [2] [3]}

The genetics of Rubus is extremely complex, so that it is difficult to decide on which groups should be recognized as species. There are many rare species with limited ranges such as this. Further study is suggested to clarify the taxonomy.^[4] Some studies have suggested that R. adenocaulis may have originated as a hybrid between R. allegheniensis and R. setosus.^[5]

Notes and References

1. http://bonap.net/MapGallery/County/Rubus%20adenocaulis.png Biota of North America Program 2014 county distribution map
2. https://www.biodiversitylibrary.org/page/607473#page/336/mode/1up Fernald, Merritt Lyndon. 1940. Rhodora 42(500): 288-290
3. https://www.biodiversitylibrary.org/page/607473#page/333/mode/1up Fernald, Merritt Lyndon. 1940. Rhodora 42(500): plates 612 + 613
4. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=128837 Flora of North America, Rubus Linnaeus, 1754. Bramble
5. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=242417156 Flora of North America, Rubus allegheniensis Porter, 1896. Allegheny or common blackberry, sow-teat berry, ronce des Alléghanys