10 (15)cm, Rivine's Violet is a perennial stoloniferous violet native of Central European woods. Sky blue to intense blue flowers with large petals and a broad white to pale yellowish green spur above heart shaped to ovoid, plain green leaves. For any well drained, humus rich soil in partial shade to full sun. Seeds from a population of woods near Pirmasens, southwestern Winestreet, Germany, woods of Langen near Frankfurt, Germany, and open spots in woods in Sandhausen, Germany. III-IV.