在四川省丹稜县唐河镇中学操场的一角,有一棵树龄60多年的双肋桉树(Eucalyptusbiostata),它主干端正,树体粗大,高约28米,干身挺直,胸径达130厘米,材积十多立方米。这棵双肋桉是县知事杨万成1922年从外地引进一批桉树中保留下来唯一的一株,也是四川省树龄最老、树体最大的一株,值得研究保护。 At the corner of the middle school playground in Tanghe Town, Danling County, Sichuan Province, there is an Eucalyptus biostata, more than 60 years old, with a solid trunk and a large tree about 28 meters high, with a straight stem and a breast diameter of 130 cm. Volume of more than 10 cubic meters. The double-ribbed eucalyptus is the only one preserved by Yang Wancheng, governor of the county, in a batch of eucalyptus introduced from the outside in 1922. It is also the oldest tree in Sichuan with the largest tree, which deserves to be studied and protected.