Lasianthus

Lasianthus acuminatus Wight (Southern Western Ghats as per India Biodiversity Portal)
  

Lasianthus capitulatus Wight (Southern Western Ghats as per India Biodiversity Portal)

Lasianthus inodorus Blume

Lasianthus venulosus (Wight & Arn.) Wight (India (Tamil Nadu) as per POWO)

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Lasianthus species ?- Reiek, Mizoram

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BSI Flora of India Checklist Vol. 2 (Distribution):

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Flora of Peninsular India:
Lasianthus acuminatus
Lasianthus blumeanus
Lasianthus capitulatus
Lasianthus ciliatus
Lasianthus cinereus
Lasianthus coffeoides
Lasianthus dichotomus
Lasianthus jackianus
Lasianthus oblongifolius
Lasianthus obovatus
Lasianthus parvifolius
Lasianthus rostratus 
Lasianthus sessilis
Lasianthus strigillosus
Lasianthus truncatus (syn. of Lasianthus verticillatus (Lour.) Merr. as per POWO)
Lasianthus venulosus
Lasianthus verticillatus

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Species with distribution in annotated checklist of Flowering plants of Nepal (Distribution):
Lasianthus wallichii Wight (1500 m; Himalaya (Nepal), Assam, Burma) (syn. of Lasianthus attenuatus var. attenuatus as per POWO))

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Some species found in Indian Subcontinent with description & keys from Flora of China (Distribution):
Lasianthus attenuatus Jack (Forests, shaded and wet places; 200-1800 m. Fujian, Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Bhutan, Cambodia, NE India, Indonesia, S Japan, Laos, Malaysia, Myanmar, Nepal, Papua New Guinea, Philippines, Thailand, Vietnam])
Lasianthus biermannii King ex J. D. Hooker (Montane forests, shaded and wet places; 1000-2500 m. Guizhou, Hainan, Xizang, Yunnan [Bhutan, NE India, Myanmar])
Lasianthus chrysoneurus (Korthals) Miquel (Forests, shaded and wet places; 500-1200 m. S Yunnan [Cambodia, India, Indonesia (Java), Laos, Myanmar, Papua New Guinea, Thailand, Vietnam])
Lasianthus hirsutus (Roxburgh) Merrill (Forests, shaded and wet places; 100-1500 m. Guangdong, Guangxi, Hainan, Taiwan [Bangladesh, India (including Andaman and Nicobar Islands), Indonesia, Japan (Ryukyu Islands), Malaysia, Myanmar, Papua New Guinea, Philippines, Thailand, Vietnam])
Lasianthus hookeri C. B. Clarke ex J. D. Hooker (Forests, shaded and wet places; 300-1500 m. Guangxi, Guizhou, Xizang, Yunnan [NE India, Myanmar, Thailand, Vietnam])
Lasianthus inodorus Blume (Montane forests, shaded and wet places; 1000-1800 m. S Yunnan [E Bangladesh, Cambodia, NE India, Indonesia (Java, Sumatra), Thailand, Vietnam])
Lasianthus japonicus Miquel (Forests, shaded and wet places; 200-2300 m. Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [NE India, S Japan (Kyushu, Ryukyu Islands, Shikoku), Laos, N Vietnam])
Lasianthus lancifolius J. D. Hooker (Forests, shaded and wet places; 500-1700 m. Guangdong, Guangxi, Hainan, Yunnan [Bangladesh, Bhutan, NE India, NE Thailand, N Vietnam])
Lasianthus lucidus Blume (Montane forests, shaded and wet places; 900-2400 m. Hainan, Yunnan [Bangladesh, NE India, Indonesia, Myanmar, Philippines, Thailand, Vietnam])
Lasianthus micranthus J. D. Hooker (Forests, shaded and wet places; 100-1800 m. Fujian, Guangdong, Guangxi, Hainan, Taiwan, Xizang, Yunnan, Zhejiang [NE India, Thailand, N Vietnam])
Lasianthus obscurus (Blume ex Candolle) Miquel (Forests, shaded and wet places; 300-1200 m. Hainan, Yunnan [India (S Andaman Islands), Indonesia (Java, Sumatra), Myanmar, Thailand, Vietnam])
Lasianthus rigidus Miquel (Forests, shaded and wet places; 500-700 m. Hainan, S Yunnan [NE India, Indonesia (Java, Sumatra), Philippines])
Lasianthus sikkimensis J. D. Hooker (Forests, shaded and wet places; 300-1600 m. Fujian, Guangdong, Guangxi, Taiwan, Yunnan, Zhejiang [Bangladesh, NE India, Philippines, Thailand, N Vietnam])
Lasianthus verticillatus (Loureiro) Merrill (Forests, shaded and wet places; 100-1000 m. Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Cambodia, India (Andaman and Nicobar Islands), Indonesia, Japan (Ryukyu Islands), Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam])