紫椴Tilia amurensis Rupr.

别名：阿穆尔椴树;小叶椴;锦椴;椴树;椴麻树;宝日-导木;籽椴;椴;枳椴;菩提树;阿穆尔椴;

科名：椴树科 Tiliaceae

属名：椴树属 Tilia

《中国植物志》第49(1)卷063页
  13.紫椴（东北木本植物图志）
  Tilia amurensis Rupr., Fl. Cauc. 253. 1869;胡先骕??陈焕镛，中国植物图谱. 4 .27. 图版177. 1935;东北木本植物图志419. 图版134. 照片326. 1955;中国高等植物图鉴2:791. 图3312. 1972.

《Flora of China》 Vol. 12 (2007)
Tilia amurensis  Ruprecht
紫椴   zi duan
Trees to 25 m tall, 1 m d.b.h. Bark dark gray, exfoliating; branchlets white or reddish stellate pubescent, glabrescent; terminal bud glabrous, bud scales 3. Petiole slender, 2-3.5 cm, glabrous; leaf blade broadly ovate or ovate-orbicular, 4.5-6 × 4-5.5 cm, abaxially greenish, hairy only in vein axils, adaxially glabrous, lateral veins 4-5 pairs, base cordate or rarely obliquely truncate, margin serrate, teeth ca. 1 mm, pointed, apex acute, acuminate, truncate or slightly emarginate or 3-lobed. Cymes 3-20-flowered, slender, 3-5 cm, glabrous. Bracts on 1-3.5 cm stalk, narrowly band-shaped, 3-7 × 0.5-0.8 cm, adnate to peduncle for 1/3-1/2 of length, both surfaces glabrous. Pedicel 7-10 mm. Sepals broadly lanceolate, 5-6 mm, abaxially stellate puberulent. Petals 6-7 mm. Stamens 20, 5-6 mm; staminodes absent. Ovary canescent-tomentose; style ca. 5 mm, glabrous. Fruit ovoid-globose, 5-angled or obscurely angled, 5-8 mm, stellate tomentose; exocarp thickly leathery, fragile, indehiscent. Fl. Jul. 2n = 82.
Mixed Abies and Picea forests; 1300-1400 m. Heilongjiang, Jilin, Liaoning [Korea, Russia].
Tilia amurensis is similar to T. japonica but differs in having smaller leaves and bracts and a shorter cyme.