Variable Blackberry
Rubus × biformispinus
- Native to:
- Canada, United States
Bernie,Peck, Charles H. (Charles Horton), 1833-1917 House, Homer D. (Homer Doliver), 1878-1949 New York (State). State Botanist,Van Meter, Mary G United States. Office of Mycology and Disease Survey,Boyer, Jean-Baptiste - candidat Dubois, Jean-Baptiste - président,Société mycologique de France,Peck, Charles H. (Charles Horton), 1833-1917 House, Homer D. (Homer Doliver), 1878-1949 New York (State). State Botanist,Hermann Hoffmann,,Cash, Edith K. (Edith Katherine), 1890- United States. Bureau of Plant Industry, Soils, and Agricultural Engineering,Aubert, G.,Kungl. Svenska vetenskapsakademien,Peck, Charles H. (Charles Horton), 1833-1917 House, Homer D. (Homer Doliver), 1878-1949 New York (State). State Botanist
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Rosaceae
- Genus:
- Rubus
- Species:
- Rubus × biformispinus
- USDA Symbol:
- RUMU3
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Subshrub
- Height:
- 150 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- may,jun
- Bloom Colors:
- white
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★★ Butterfly & moth species supported by this genus (NWF)
Garden & Ecology Notes
- Wildlife Value:
- birds, small mammals
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts vigorously from root crown following fire or cutting.
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 90–120 days
- Germination Time:
- 14–60 days
- Notes:
- Seeds require cold stratification. Germination can be erratic and may take several months.
The above propagation data sourced from Claude AI
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Source: Claude AI