# Isodon

Isodon (teacost) is a genus of flowering plants in the family Lamiaceae described in 1840. It is native to tropical and subtropical parts of the Old World, primarily Asia but two species are from Africa. Many of the species are endemic to China, where it is called xiangchacai or "fragrant tea". In China, a rapid radiation of Isodon ocurred during the Pliocene that coincided with a shift from herbs inhabiting humid areas to shrubs inhabiting dry valleys.

## Species

* Isodon adenanthus - Guizhou, Sichuan, Yunnan
* Isodon adenolomus - Sichuan, Yunnan
* Isodon albopilosus - Sichuan
* Isodon amethystoides - S China and Taiwan
* Isodon angustifolius - Yunnan
* Isodon × arakii - Japan
* Isodon assamicus - Assam
* Isodon atroruber - Bhutan
* Isodon barbeyanus - Sichuan
* Isodon brevicalcaratus - Guangdong
* Isodon brevifolius - Yunnan
* Isodon bulleyanus - Yunnan
* Isodon calcicola - Yunnan
* Isodon capillipes - Sri Lanka
* Isodon coetsa - China, Tibet, Indian Subcontinent, Indochina, Indonesia, Philippines
* Isodon colaniae - Laos
* Isodon dawoensis - Sichuan
* Isodon dhankutanus - Nepal
* Isodon effusus - Japan
* Isodon enanderianus - Sichuan, Yunnan
* Isodon eriocalyx - Myanmar, Thailand, SW China
* Isodon excisoides - Hubei, Sichuan, Yunnan
* Isodon excisus - Primorye, Korea, Japan, NE China
* Isodon flabelliformis - Sichuan, Yunnan
* Isodon flavidus - Guizhou, Yunnan
* Isodon flexicaulis - Sichuan, Yunnan
* Isodon forrestii - Sichuan, Yunnan
* Isodon gesneroides - Sichuan
* Isodon gibbosus - Guizhou, Sichuan
* Isodon glutinosus - Sichuan, Yunnan
* Isodon grandifolius - Sichuan, Yunnan
* Isodon grosseserratus - Sichuan
* Isodon henryi - S China
* Isodon hirtellus - Sichuan, Yunnan
* Isodon hispidus - Bhutan, Assam, Bangladesh, Myanmar, Thailand, Yunnan, Laos
* Isodon × inamii - Japan
* Isodon inflexus - China, Korea, Japan
* Isodon interruptus - Yunnan
* Isodon irroratus - Yunnan, Tibet
* Isodon japonicus - China, Korea, Japan, Primorye, Amur
* Isodon kurzii - Sikkim
* Isodon latifolius - Sichuan
* Isodon leucophyllus - Sichuan, Yunnan
* Isodon liangshanicus - Sichuan
* Isodon lihsienensis - Sichuan
* Isodon longitubus - Anhui, Zhejiang, Japan
* Isodon lophanthoides - China, Indian Subcontinent, Indochina
* Isodon loxothyrsus - Sichuan, Tibet, Yunnan
* Isodon lungshengensis - Guangxi
* Isodon macrocalyx - S China incl Taiwan
* Isodon macrophyllus - Anhui, Jiangsu
* Isodon medilungensis - Sichuan
* Isodon meeboldii - Myanmar, Thailand
* Isodon megathyrsus - Sichuan, Yunnan
* Isodon melissoides - Arunachal Pradesh, Yunnan, Bhutan, Assam, Bangladesh
* Isodon mucronatus - Sichuan
* Isodon muliensis - Sichuan
* Isodon myriocladus - Guangxi, Guangdidong, Sichuan
* Isodon namikawanus - Nepal
* Isodon nervosus - SE + SW China
* Isodon nigrescens - S India, Sri Lanka
* Isodon nilgherricus - S India
* Isodon × ohwii - Japan
* Isodon oreophilus - Yunnan
* Isodon oresbius - Sichuan, Yunnan
* Isodon pantadenius - Yunnan
* Isodon parvifolius - Gansu, Shaanxi, Sichuan, Tibet
* Isodon pharicus - Sichuan, Tibet, Nepal, Bhutan
* Isodon phulchokiensis - Nepal
* Isodon phyllopodus - Guizhou, Sichuan, Tibet, Yunnan
* Isodon phyllostachys - Sichuan, Yunnan
* Isodon pleiophyllus - Yunnan
* Isodon racemosus - Hubei, Sichuan, Thailand
* Isodon ramosissimus - tropical Africa
* Isodon repens - Himalayas
* Isodon rivularis - S India
* Isodon rosthornii - Guizhou, Sichuan, Yunnan
* Isodon rubescens - S + C China
* Isodon rugosiformis - Yunnan
* Isodon rugosus - Oman, Afghanistan, Pakistan, India, Tibet, Nepal, Bhutan, Bangladesh
* Isodon schimperi - East Africa from Ethiopia to Uganda
* Isodon scoparius - Yunnan
* Isodon scrophularioides - Himalayas
* Isodon sculponiatus - Himalayas, S China, Vietnam
* Isodon secundiflorus - Sichuan
* Isodon serra - China, Korea, Primorye
* Isodon setschwanensis - Sichuan, Yunnan
* Isodon shikokianus - Japan
* Isodon silvaticus - Tibet
* Isodon smithianus - Sichuan, Tibet
* Isodon × suzukii - Japan
* Isodon tenuifolius - Sichuan, Yunnan
* Isodon ternifolius - Saudi Arabia, Himalayas, S China
* Isodon teysmannii - Thailand, Indonesia
* Isodon × togashii - Japan
* Isodon trichocarpus - Japan
* Isodon umbrosus - Japan
* Isodon walkeri - Indian Subcontinent, Indochina, S China
* Isodon wardii - Tibet
* Isodon websteri - Liaoning
* Isodon weisiensis - Yunnan
* Isodon wightii - S India
* Isodon wikstroemioides - Sichuan, Tibet, Yunnan
* Isodon xerophilus - Yunnan
* Isodon yuennanensis - Sichuan, Tibet