Oreostemma alpigenum Oreostemma alpigenum fruits with mm ruler on right. Oreostemma alpigenum fruits with mm ruler on top. Oreostemma alpigenum seedlings germinated within a growth chamber set at a 25/15°C (77/59°F) day/night temperature with a 12-hour day photoperiod of cool-white fluorescent light. Oreostemma alpigenum seedlings growing in 48-cell liners at the Berry Seed Bank research greenhouse located in Portland, Oregon. Oreostemma alpigenum seedlings growing in 48-cell liners at the Berry Seed Bank research greenhouse located in Portland, Oregon. Oreostemma alpigenum seedlings growing in 48-cell liners at the Berry Seed Bank research greenhouse located in Portland, Oregon. Oreostemma alpigenum rootball of seedlings growing in 48-cell liners at the Berry Seed Bank research greenhouse located in Portland, Oregon. Oreostemma alpigenum rootball of seedlings growing in 48-cell liners at the Berry Seed Bank research greenhouse located in Portland, Oregon.