Crinum thaianum, common name Thai onion plant or water onion, is an emergent plant species endemic to coastal plain of southern Thailand in Ranong and Phang Nga Provinces.[2][3] Its natural habitat is along the banks of running streams, where its roots and bulb are submerged but the flowering holds the umbel of large, showy flowers above the surface. This natural habits make it a wonderful addition for tropical aquaria, and it is sold in many lands to be used in decorating displays of tropical fish.[4][5][6] In nature, however, the species is threatened and diminishing in numbers due to habitat destruction.[1]
Long, up to 60 inches (150 cm) (or longer), tough, ribbon-like bright green leaves grow from a bulb that looks much like an onion. White lily-like flowers may form on a long stalk emerging above the water's surface.[2]
Crinum thaianum is cultivated as an aquatic ornamental to decorate aquaria. It requires water temperatures of 72-86 degrees F (22-30 degrees C) and is popular in home aquaria because it is easy to keep, tolerant of temperature swings and lighting variations, and because its leaves are tough enough to withstand the attention of herbivorous fish. Propagation is from daughter bulbs. It likes a rich substrate and additional CO2 encourages growth with space to spread and grow. It does well in a warm outside pond.[7][8]
Crinum thaianum is not under protection by any legislation in Thailand and also not protected by CITES. The habitats of this species are also not under protection.
This species has remaining only 1% and found population very high fragmented and rapidly decreasing. In some habitats, it is already extinct due to collecting the bulb for commercial purposes, dredging under flooding control schemes, and land use changes. Currently, Crinum thaianum has been listed as Endangered under IUCN Redlist and Thailand Data Redlist. It is really urgent required for special management and conservation plan to reduce decrease and extinction.
Crinum thaianum, common name Thai onion plant or water onion, is an emergent plant species endemic to coastal plain of southern Thailand in Ranong and Phang Nga Provinces. Its natural habitat is along the banks of running streams, where its roots and bulb are submerged but the flowering holds the umbel of large, showy flowers above the surface. This natural habits make it a wonderful addition for tropical aquaria, and it is sold in many lands to be used in decorating displays of tropical fish. In nature, however, the species is threatened and diminishing in numbers due to habitat destruction.
Crinum thaianum J.Schulze è una pianta bulbosa appartenente alla famiglia delle Amarillidacee, endemica della Thailandia.[2]
La pianta può raggiungere i 150 cm di altezza. Le foglie, verdi e nastriformi, si dipartono da un bulbo simile a una cipolla. I fiori sono grandi, bianchi e la loro forma può ricordare quella di un giglio[3].
La pianta è endemica del sud della Thailandia[4], nelle province di Ranong e Phang Nga[3].
Vive lungo le rive dei fiumi, dove le sue radici sono sommerse ma i fiori sono al di sopra della superficie. È una pianta molto comune negli acquari per pesci tropicali[5][6].
È una pianta spesso utilizzata in acquario perché facile da coltivare, tollerante alle variazioni della luminosità.
La Lista rossa IUCN classifica Crinum thaianum come specie in pericolo di estinzione (Endangered).[1] È minacciata dal degrado del suo habitat e dalla raccolta per la coltivazione in acquario.
Crinum thaianum J.Schulze è una pianta bulbosa appartenente alla famiglia delle Amarillidacee, endemica della Thailandia.
Vattenkrinum (Crinum thaianum) är en art i krinumsläktet från Thailand. Den växer i öppet strömmande vattendrag mellan några cm djupt, ner till 2 m. Arten odlas ibland som akvarieväxt.
Vattenlevande perenn ört med lök. Lök till 7 cm i diameter med lökhals. Blad bandlika, 2-3 m långa och 1,5-2 cm breda, ljusgröna, något tandade. Blomstjälk till 80 cm lång, grön med purpur ton med två rödaktiga stödblad. Blommor 5-8 st, 12-16 cm vida, vita eller rödaktiga med smalt lansettlika blomblad. Blompip 12-14 cm lång, grönaktigt vit. Väldoftande.
Det finns sammanlagt fem vattenlevande krinum-arter. De andra är krusig vattenkrinum, C. aquaticum, C. calamistratum och C. purpurascens.
Den används ofta som bakgrundsväxt i stora akvarier och planteras så att 2/3 av löken är synlig över gruset, annars ruttnar lätt löken. Kräver stort utrymme men är en mycket bra och tålig akvarieväxt. Bladen är sega och klarar sig ofta bra gentemot växtätande fiskar. Beskärs genom att de längsta bladen klipps av. När plantan blir äldre kan den blomma med blomställningen över vattenytan. Accepterar också bräckvatten. Förökas med sidolökar.
Vattenkrinum (Crinum thaianum) är en art i krinumsläktet från Thailand. Den växer i öppet strömmande vattendrag mellan några cm djupt, ner till 2 m. Arten odlas ibland som akvarieväxt.
Crinum thaianum là một loài thực vật có hoa trong họ Amaryllidaceae. Loài này được J.Schulze mô tả khoa học đầu tiên năm 1971.[3]
Crinum thaianum là một loài thực vật có hoa trong họ Amaryllidaceae. Loài này được J.Schulze mô tả khoa học đầu tiên năm 1971.
