Barclaya wellyi

Barclaya wellyi is a species of perennial aquatic plant native to Sumatra, Indonesia.

Vegetative characteristics
Barclaya wellyi is an aquatic plant with 2–5 cm long, 1 cm wide, stoloniferous, villous rhizomes. The 10-15 petiolate, cordate leaves are 6–10 cm long, and 6–10 cm wide. The petioles are 10–20 cm long.

Generative characteristics
The nocturnal, 4 cm wide flowers are attached to 5–20 cm long peduncles. The outer tepals are 3 cm long. The four iner tepals are 1.5 cm long. Staminodes and fertile stamina are present. The flowers have 20-30 anthers. The stigmatic cup has 9 carpellary appendages. The ellipsoid fruit bears 2 mm long, spiny, ellipsoid, dark brown seeds.

Cytology
The diploid chromosome count is 2n= 36.

Vegetative reproduction
It can reproduce vegetatively through the formation of stolons.

Publication
It was first described by Suwidji Wongso, Isa Ipor, and Niels Jacobsen in 2022.

Type specimen
The type specimen was collected by Suwidji Wongso in Sumatra, Indonesia on the 27th of May 2021. Material had been collected earlier from the type location, but it was only later recognised to be distinct.

Etymology
The specific epithet wellyi honours Mr. Welly Yansen.

Conservation
It is classified as data deficient (DD) under the IUCN criteria.

Habitat
It is only known from the type location, where it occurs beneath an old rubber plantation close to an oil palm plantation. The habitat is characterised by acid waters at water temperatures of 29 °C. It occurs sympatrically with Cryptocoryne minima Ridl.