Cryptocoryne uenoi Y. Sasaki

In 2002 Mr. Yuji Sasaki from the Rayon Vert Aquarium, Kumamoto, Japan, collected this species in Sarawak, South West of Simmangan (Sri Aman). As he said, Mr. Ueno from Japan found C. uenoi already in 2001, but it was not recognized as a new species because the leaves of the plant are quite look like C. keei. Because of the extreme low water level in 2002, Sasaki found flowering plants. It is quite amazing that this new species could be found in such a well investigated area. 

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Habitus of C. uenoi. Note the irregular bullated leaves (only a few).
coll. Sasaki M-SUSK
photo Sasaki
The spatha has the lower part buried in the ground. This may be simply by the deposition of soil.
coll. Sasaki M-SUSK
photo Sasaki
In this rather wide, muddy stream you would never find the plant unless the water level is low.
coll. Sasaki M-SUSK
photo Sasaki
Detail of the stream with an emersed sandbank covered with C. uenoi. Crypts do like sandbanks.
coll. Sasaki M-SUSK
photo Sasaki
       
Close-up of the limb of the spathe. Note the toothed margin. The collar is hardly visible.
coll. Sasaki M-SUSK
photo Sasaki
Another spathe of C. uenoi. The leaf on the background shows some variegated markings.
coll. Sasaki M-SUSK
photo Sasaki
The color of the leaves may vary from green with distinct markings (see left picture) to brown.
coll. Sasaki M-SUSK
photo Sasaki
The leaf has a pointed apex (acute) and cordate base. The depressions in the leaf are rather irregular.
coll. Sasaki M-SUSK
photo Sasaki
       
The main vein of the leaf may be a bit pale creamish in color. Size of the leaf up to 12 x 4 cm.
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photo Sasaki
The lower part of the tube (kettle) is inside whitish. The male flowers show a brown ring.
coll. Sasaki M-SUSK
photo Sasaki
Type material of C. uenoi that is deposited in the Leiden herbarium (L).
coll. Sasaki M-SUSK
Distribution of C. uenoi just South West from Simmangan (Sarawak).
       

Cryptocoryne uenoi is not so easy to cultivate, as far as we know today. For that reason, the chromosome number is not known yet.

Updated January 2003

Literature

Sasaki, Y., 2002. Cryptocoryne uenoi Y. Sasaki (Araceae), eine neue Art aus Sarawak. Aqua Planta 27(4): 147-149.