Searching for C. jacobsenii in Johor

I recently read the post from See Nature website that C. jacobsenii was recently found in Johore state together with C. nurii and therefore decided to stop by one of the C. nurii habitat in a forest in Johore with my explorer friend to search for it and this was what we found:
Overview of the habitat:

Close up of the riverbeds where many cryptocoryne specimens of varying apperance could be found, note also the many tree roots growing out the river bed:

Close up of the various specimens of cryptocorynes found, these were not the usual C. nurii as their leaves edges were not wavy:

While some parts of the river bed were covered with coarse sand, there were some sections which were more muddy with fine sand:

These were some inhabitants living in the river:

Whether the cryptocorynes found were the same shown on the See Nature website, whether the various specimens found were the same or different species and whether they were C. jacobsenii remain to be proved by finding the opened spathes. However one thing for sure was that it was again proven that having multiple cryptocoryne species staying together within one locality is common.

C. sp. 'Sedili 3' mystery solved!

I revisited C. sp. 'Sedili 3' habitat with my explorer friend and we were happy to finally find an open spathe to confirm its identity.

From the appearance of the spathe, the species should belong to that of the C. cordata family but I am not sure which variety it belonged to. Below are the close up photographs of the spathe for your review. Note that the specimen had raised collar at the throat of the spathe.

The spathe was cut off and brought to the operation theatre for further autopsy.

The kettle was cut open and as usual, a fly "hopped" out in a daze after being unlawfully detained inside the kettle for some time.

So what do you think? Is this C. cordata var. cordata or should this be considered as . cordata var grabowskii?

C. sp. 'Pahang 8', should it be C. cf. xpurpurea 'Rompin' or C. cf. zukalii or what else?

I managed to visit the habitat of what I earlier termed as C. cf. xpurpurea to see the opened spathe in its natural habitat in Rompin. My friend who saw it earlier felt that it could be comparable to C. zukalii instead. attached below are the photographs which I took for your reference for you to decide yourself what it should be.

an unopened spathe

the golden orange coloured limb of the opened spathe, note the acute angle of the limb and the throat

the spathe being cut off to further expose the interior of the kettle

the slightly yellow coloured throat attracting a fly to rest, , the throat areas were not fully closed up for all the 3 opened spathes I saw so far

the interior of the kettle

The spectrum of variation in cryptocorynes found in the nature is sometimes really too great in my opinion to be able to accurately identify which species should a cryptocoryne be declared as. Maybe I should revert to terming it as just C. sp. 'Pahang 8' so as not to cause future confusion due to inaccurate indentification!

Another lesson learnt from this habitat : if one is too oblivious to what is happening in the surrounding, one might be easily crushed by the little fingers of others (mine in this case :-p, the mosquito would not fly away once they started sucking blood even as my little fingers closed in to kill them).

Inside the kettle of C. pontederiifolia 'Thomson'

I cut open the kettle of C. pontederiifolia 'Thomson' (the one flowering in my tub pond) to take some close up shots of its interior for record.