Satoshi Koi

Thawatchaia is a genus of flowering plants belonging to the family Podostemaceae. The genus name of Thawatchaia is in honour of Thawatchai Santisuk (b. 1944), a Thai herbarium director in Bangkok, and also, Thawatchai Wongprasert (fl. 2000), a plant collector. It was first described and published in Acta Phytotax. Geobot. Vol.55 on page 66 in 2004. It is native range to Thailand and Laos.

Indodalzellia gracilis is a species of flowering plant in the family Podostemaceae. It is the sole species in genus Indodalzellia. It is an aquatic subshrub native to Kerala state in southwestern India. It was first described as Dalzellia gracilis in 2001. In 2009 it was placed in its own genus as Indodalzellia gracilis.

Hydrodiscus koyamae is a species of flowering plant in the family Podostemaceae. It is the sole species in genus Hydrodiscus. It is an aquatic subshrub endemic to north-central Laos. Hydrodiscus koyamae grows on rocks in seasonally-inundated stream rapids and waterfalls. It roots to rocks with a flattened cylindrical disk, from which many-branched shoots grow out to one meter in length. It is known from only three locations in Phuu Khao Khouay National Park in Bolikhamsai Province of north-central Laos. The type specimen was collected in Tat Luek Nam Tok (Tad Leuk waterfall). The species was

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Laosia ramosa is a species of flowering plant belonging to the family Podostemaceae. It is the sole species in genus Laosia. It is endemic to Laos.

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Ctenobryum makongense is a species of flowering plant belonging to the family Podostemaceae. It is the sole species in genus Ctenobryum. It is endemic to Laos.

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Paradalzellia tirunelveliana is a species of flowering plant in the family Podostemaceae. It is the sole species in genus Paradalzellia. It is an aquatic perennial endemic to Tamil Nadu state in southern India. The species is known from a single location in Kalakkad Mundanthurai Tiger Reserve in the Western Ghats range, in Thulukkanparai, Tirukkurungudi, Tirunelveli district, Tamil Nadu. The species was first described as Indotristicha tirunelveliana in 1977. In 2022 it was placed in its own genus as Paradalzellia tirunelveliana.

Paradalzellia tirunelveliana is a species of flowering plant in the family Podostemaceae. It is the sole species in genus Paradalzellia. It is an aquatic perennial endemic to Tamil Nadu state in southern India. The species is known from a single location in Kalakkad Mundanthurai Tiger Reserve in the Western Ghats range, in Thulukkanparai, Tirukkurungudi, Tirunelveli district, Tamil Nadu. The species was first described as Indotristicha tirunelveliana in 1977. In 2022 it was placed in its own genus as Paradalzellia tirunelveliana.

Hydrodiscus koyamae is a species of flowering plant in the family Podostemaceae. It is the sole species in genus Hydrodiscus. It is an aquatic subshrub endemic to north-central Laos. Hydrodiscus koyamae grows on rocks in seasonally-inundated stream rapids and waterfalls. It roots to rocks with a flattened cylindrical disk, from which many-branched shoots grow out to one meter in length. It is known from only three locations in Phuu Khao Khouay National Park in Bolikhamsai Province of north-central Laos. The type specimen was collected in Tat Luek Nam Tok (Tad Leuk waterfall). The species was

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