This grasslike crypt was originally introduced from the vicinity of Ubon Ratchathani in eastern Thailand. It is cultivated as aquarium plant for more than 35 years, but until 2015 it was seen as Cryptocoryne crispatula var. tonkinensis, even as the "true tonkinensis". It turned out that var. tonkinensis is a different plant from North Vietnam and South China. After that the plant from Thailand was described as a new variety, Cryptocoryne crispatula var. kubotae.
Kubota's water trumpet is the variety of Cryptocoryne crispatula with the narrowest leaves, which makes it highly interesting for aquascapers. It has green to reddish-brown soft, smooth or slightly undulate leaves, 10-40 cm long and only 2-4 mm wide. Under water, the leaves assume beautiful coppery brown hues. Unfortunately this crypt is only occasionally available in trade.
Cryptocoryne crispatula var. kubotae is a little demanding; at least medium lighting and an open place in the aquarium are recommendable. Nutrient-rich substrate and CO2 addition are beneficial for its growth. Apparently it develops only few runners.
This very narrow leaved, medium-sized Cryptocoryne looks best as an accent plant or small group in the midground. Its appearance is characterised by delicate foliage and coppery hues.