盛夏花火紅滿佈枝頂，與火焰樹爭妍鬥麗，冬天葉落枯枝斜展如巨爪。聯合書院校友謝婉雯醫生二零零三年因對抗「非典型肺炎」英勇殉職，謝校友曾宿恆生樓，樓旁種植了一株「鳳凰木」永誌懷念。

Located in United College, this specimen is also known as the tree of Dr. Joanna Tse, an alumnus of United College.  Dr. Tse sacrificed her life for the SARS patients under her care in 2003.  The Flame tree is dedicated to her and to commemorate her bravery and self-sacrifice.  In summer, the bright red flowers cover the branches like flames.  In winter, the flowers and leaves fall, leaving the arching branches like giant claws.