俞致貞 牡丹圖 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（1915-1995），女畫家，字一雲，北京人。師從於非闇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。曾為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