Pogostemon helferi
{{Short description|Species of aquatic plant}}
{{Use dmy dates|date=April 2025}}
{{Speciesbox
|image = Pogostemon3.jpg
|genus = Pogostemon
|species = helferi
|authority = Hook.f.
|synonyms =
}}
Pogostemon helferi, also known as dao-noi, is a species of Thai aquatic plant. It is a common ornamental plant in aquariums.
Taxonomy
The type locality is Sangkhla Buri district, Kanchanaburi, Thailand.{{sfn|Pramali|Bongcheewin|Traiperm|2018|p=251}}
Distribution
Pogostemon helferi is distributed across Myanmar and western Thailand.{{sfn|Wangwibulkit|Vajrodaya|2016|p=20}} A 2005 survey conducted in Thailand found the species in north, north-east, east, and west Thailand. However, a 2007 survey found the species only in the Kanchanaburi province, found near Myanmar.{{sfn|Wangwibulkit|Vajrodaya|2016|p=20}} A 2024 review found the species distribution extending to the Indian Himalayan Region.{{sfn|Fahira|Harnelly|Zumaidar|2024|p=10}}
Because of the high demand for the plants in aquarium trade, the species has been declining in population in its natural habitat, with local extinction emerging as a possibility.{{sfn|Wangwibulkit|Vajrodaya|2016|p=20}}
Description
Pogostemon helferi is a common ornamental plant. It is commonly known by its local name, dao-noi, meaning "little star". It is a popular plant in aquariums, and is of high demand in the aquarium trade. As of 2016, the economic value of the production of the species was valued at {{Currency|252000|THB}} whilst the annual market demand was more than {{Currency|500000|THB|linked=no}}.{{sfn|Wangwibulkit|Vajrodaya|2016|p=20}}
The species has dimorphic leaves, two distinct types, the first being emerged, which are less durable, and submerged.{{sfn|Pramali|Bongcheewin|Traiperm|2018|p=257}} It has irregularly shaped epidermis cells.{{sfn|Pramali|Bongcheewin|Traiperm|2018|p=251}} Most stocks of the species are harvested from the wild.{{sfn|Wangwibulkit|Vajrodaya|2016|p=20}}
References
= Citations =
{{reflist}}
= Works cited =
- {{cite journal |last=Fahira |first=Cut Nathasya |last2=Harnelly |first2=Essy |author3=Zumaidar |title=Complete Chloroplast Genome, Distribution, and Pharmacological Activities Pogostemon: A Mini Review |journal=Jurnal Penelitian Pendidikan IPA |volume=10 |issue=SpecialIssue |date=25 August 2024 |issn=2407-795X |doi=10.29303/jppipa.v10iSpecialIssue.7048 |doi-access=free |pages=7–18 |url=https://jppipa.unram.ac.id/index.php/jppipa/article/download/7048/5579 |access-date=9 May 2025}}
- {{cite journal |last=Pramali |first=Kanjana |last2=Bongcheewin |first2=Bhanubong |last3=Traiperm |first3=Paweena |title=Leaf micromorphological adaptation of Pogostemon spp. (section Eusteralis) in Thailand |journal=Agriculture and Natural Resources |volume=52 |issue=3 |date=2018 |doi=10.1016/j.anres.2018.09.002 |doi-access=free |pages=250–258}}
- {{cite journal |first1=Maneerat|last1=Wangwibulkit |first2=Srunya|last2=Vajrodaya|title=Ex-situ propagation of Pogostemon helferi (Hook. f.) Press using tissue culture and a hydroponics system |journal=Agriculture and Natural Resources|volume=50 |issue=1 |date=1 January 2016 |issn=2452-316X |doi=10.1016/j.anres.2015.11.001 |doi-access=free |pages=20–25}}
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