图1. 不同形态叶片的手绘图。 A, 铃兰, 单叶, 全缘, 叶椭圆形或卵状披针形。B, 水青冈, 单叶, 叶缘有锯齿, 叶卵形或长卵形。C, 荠, 基生叶丛生呈莲座状, 大头羽状分裂, 顶裂片卵形至长圆形, 侧裂片长圆形至卵形; 茎生叶抱茎, 窄披针形或披针形, 边缘有缺刻或锯齿。D, 元宝枫, 单叶, 掌状5裂。E, 蒺藜, 偶数羽状复叶, 小叶矩圆形或斜短圆形。F, 水杉, 叶条形, 呈羽状排列。A-C, F, 蔡琼绘; D, 买一慧绘; E, 罗晓图绘。描述参考中国植物志中英文版(http://www.efloras.org/flora_page.aspx?flora_id=2)。

Fig. 1. Leaves with varied morphology. A, Convallaria majalis, single leaf with entire margin, leaf blade elliptic to ovate-lanceolate. B, Fagus longipetiolata, single leaf with serrate margin, blade ovate to ovate-oblong. C, Capsella bursa-pastoris, basal leaves rosulate, leaf blade oblong or oblanceolate; cauline leaves amplexicaul, narrowly oblong, lanceolate, or linear, margin entire or dentate. D, Acer truncatum, single leaf, usually 5-lobed. E, Tribulus terrestris, even-pinnately compound leaf, leaflet blades oblong to obliquely oblong, margin entire. F, Metasequoia glyptostroboides, linear leaves, pinnately aligned. Hand painted by CAI Qiong (A-C, F), MAI Yi-Hui (D), and LUO Xiao-Tu (E). Leaf morphology description was obtained from eflora (http://www.efloras.org/flora_page.aspx?flora_id=2).