02-06 02-15 SIA - Crypt. cordata siamensis 2-15 Neils Jacobsen collected these in a deep spring. 02-19 02-52 SIA - Crypt. cordata siamensis NJT 02-52 Cryptocoryne cordata siamensis 'Neils Jacobsen collection of 2002 location #52'. Quadraploid (2n=68); different from the usual diploid (2n=34) form cordata cordata or other forms of cordata siamensis (2n=102). Forms of cordata with 2n=68 are found all over Borneo; this stands out so far as the sole 2n=68 population of any cordata in Thailand. Curiously, it looks no different from a normal diploid plant.

03-1 03-2 SIA - Crypt. cordata siamensis NJT 03-2 Cryptocoryne cordata siamensis, location 'NJT 03-2' in Thailand. 04-61 C. cordata var. siamensis. Red-leaved plants from a slow running stream (near Chong Fah Waterfall, Khao Lak Lamru N.P., Phangnga, Thailand). NJT 04-61. 05-52 SIA - Crypt. cordata siamensis NJT 5-52 Cryptocoryne cordata siamensis, location 'NJT 5-52' in Thailand.