Ink and color on silk, vertical scroll. The painting depicts an red flower blossom with branches and leaves, artist signature and mark Yu Zhizhen on the top right.|||Height: 16 1/2 in (41.9 cm) Width: 15 1/2 in (39.4 cm)|俞致貞 牡丹圖|俞致貞（1915-1995），女畫家，字一雲，北京人。師從于非暗學小寫意花鳥及工筆蟲草，兼習瘦金體和篆書，後專攻工筆，爾後又隨張大千研習工筆寫意花鳥畫。曾爲中國美術家協會會員，中國老年書畫會顧問，中國書畫函授大學教授，北京工筆重彩畫會副會長，北京花鳥畫會名譽會長。擅長工筆花鳥、蟲草、蔬果。 | 款識：癸卯立春製俞致貞 | 鈐印：致貞