日本粗叶木(原亚种) ri ben cu ye mu (yuan ya zhong)

Lasianthus caudatifolius Merrill; L. hartii Franchet; L. japonicus var. satsumensis (Matsumura) Makino; L. lancilimbus Merrill; L. lucidus Blume var. caudisepalus Deb & M. Gangopadhyay; L. satsumensis Matsumura.

Leaf blade cuspidate or cuspidate-acuminate at apex; lateral veins 5-7 pairs, ascending at an oblique angle, conspicuously different from reticulate nervules. Calyx 4- or usually 5-lobed, with triangular or lanceolate teeth. Corolla 4- or usually 5-lobed.

Forests, shaded and wet places; 200-1800 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Taiwan, Yunnan, Zhejiang [NE India, S Japan (Kyushu, Ryukyu Islands, Shikoku)].

Two varieties are recognized within Lasianthus japonicus subsp. japonicus; their morphological characters and geographic distribution are presented below.

Lasianthus japonicus var. japonicus: Leaf blade lanceolate, less than 3.5 cm wide. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Taiwan, Zhejiang [NE India, S Japan (Kyushu, Ryukyu Islands, Shikoku)].

Lasianthus japonicus var. latifolius H. Zhu (Acta Phytotax. Sin. 32: 79. 1994; 宽叶日本粗叶木 kuan ye ri ben cu ye mu): Leaf blade oblong-lanceolate, more than 3.5 cm wide. Guangxi, Guizhou, Sichuan, Yunnan.