Za odredjivanje vrste biljaka Cryptocoryne roda potrebno je da se ima uvid u cvet biljke i bez toga je besmisleno da se upustamo u odredjivanje vrste. Listovi odnosno izgled biljke nam ne pruzaju dovoljno pokazatelja za uspesan rad u odredjivanju vrste biljka roda Cryptocoryne.
Brojevi u zagradama referisu ka alternativnom izboru ili drugom delu izraza datog kljuca.
Key to Cryptocoryne Species:
	
	
	
		
				
			Brojevi u zagradama referisu ka alternativnom izboru ili drugom delu izraza datog kljuca.
Key to Cryptocoryne Species:
		Code:
	
	1 (4)  Tube absent,  inflorescence opening through  a vertical 
       suture ...........................................................2
2 (3)  Leaf blades oblong, lanceolate or ribbon-like ......... C. spiralis
3      Leaf blades cordate or ovate .........................C. ferruginea
4      Tube present, opening through a horizontal throat ................5
5 (6)  Limb of inflorescence on the margins fringed ........... C. ciliata
6	Limb not fringed ................................................7
7 (20)  Leaf blades oblong, lanceolate, 8 to 20 times or even
        more times longer than wide .....................................8
8 (17)  Limb in the basal part at most half as wide as the tube .........9
9 (12)  Leaf blades entire or undulate only on the margins; if
        bullose, then always narrower than 1 cm	........................10
10 (11) Limb trimmed with red dots and lines ............ C. retrospiralis
11	Limb uniformly colored red or yellow-green .........C. tonkinensis
12      Leaf blades bullose ............................................13
13 (16) On the blade only, one row of blisters on both sides .......... 14
14 (15) Blades ribbon-like, margins alveolate  and densely
        undulate ...........................................C. tonkinensis
15	Blades oblong, lanceolate, in the center alveolate, mar
        gins nearly entire ....................................C. balansac
16	On the leaf blade both sides 2 to 3 rows
        of blisters ..........................................C. usteriana
17	Limb distinctly dilated, 3 times wider than the tube .......... 18
18 (19) Emersed leaves red, limb with distinct caudicle	 .......C. costala
19	Emersed leaves green, limb without caudicle, horizontally
        twisted	.............................................C. korthausac
20	Blades widely elliptical to cordate, maximum 2 to 4 times
        longer than wide, limb not spirally twisted ....................21
21 (26) Limb extended into a caudicle longer, or as long, as all the
        other parts of the inflorescence together ......................22
22 (23) Limb white or yellow  ...............................C. thweitesii
23	Limb red .......................................................24
24 (25) Throat with collar, tube longer than kettle .........C. johorensis
25	Throat without collar, tube shorter than 
        kettle	.........................................C. pontederifolia
26	Limb without caudicle or the caudicle reaches maximum
        the half of the inflorescence length ...........................27
27 (30) Blades leather-like, thick,  green  on both sides,   1.5  to
        twice as long as wide ..........................................28
28 (29) Limb at the base yellow, red spotted, with long 
        caudicle ............................................... C. lingua
29	Limb at the base uniformly colored, with a very short
        caudicle ............................................C. versteegii
30	Blades membranous, lower leaf surface often brown or
        red, if on both sides green, then lanceolate, 3 times or
        more longer than wide ..........................................31
31 (32) Tube distinctly shorter than the kettle	.............C. auriculath
32	Tube at least as long as the kettle ............................33
33 (38) Blades maximum 8 to 14 mm wide .................................34
34 (35) Limb short caudicle, throat yellow ....................C. nevillii
35	Limb triangular, throat not yellow .............................36
36 (37) Throat above nearly black, below colorless, limb bright
         purple	..................................................C. parva
37	Throat purple, limb pale, olive-red, dull ...............C. lucens
38	Blades wider than 16 mm	........................................39
39 (48) Blades lanceolate, 3.5 to 5 times longer than wide, limbs
        never bright red ...............................................40
40 (43) Limb   immediately  after  opening,   twisted   above   the
        throat, so that the tube opens only through a larger or
        smaller fissure	................................................41
41 (42) Throat forms an elliptical fissure, inside green-yellow or
        olive-yellow .........................................C. axelrodii
42	Throat forms a very narrow fissure, inside red-brown ....C. wendtii
43	Limb ligulate, the throat fully open  ...........................44
44 (45) Limb light yellow .......................................C. walkeri
45	Limb not yellow	.................................................46
46 (47)  Limb yellow-brown, the base dentate ...................C. becketii
47	Limb inside green, along the whole length dentate .......C. petchii
48	Blades cordate or broadly elliptical, 1.5 to 2 to 2.5 times
        longer than wide ................................................49
49 (50) Throat in the terminal part of the tube red or violet
        spotted	................................................C. gracilis
50	Throat without spots ............................................51
51 (52) Blades covered with crystalline cells ...................C. affinis
52	Blades without crystalline cells ................................53
53 (64) Throat with collar ..............................................54
54 (57) Limb as long as the kettle and tube together, bent down
         wards  .........................................................55
55 (56) Limb purple-red, petioles 2 to 3 times longer than blades,
         leaves 15 to 25 cm long ..............................C. zetvaldae
56	Limb yellow, brown spotted, plants only 5 to 10 cm high
	 .........................................................C. minima
57	Limb shorter than tube and kettle together ......................58
58 (61) Blades cordate, not blistered ...................................59
59 (60) Limb and throat purple	..............................C. griffithii
60      Limb yellow, throat red	................................C. schulzei
61      Leaf blades elliptical	.........................................62
62 (63) Blades smooth, only on the margins dentate ................ C. nuri
63      Blades blistered ........................................C. bullosa
64	Throat without collar ...........................................65
65 (74) Throat funnel-shaped ............................................66
66 (73) Limb or only the throat yellow  .................................67
67 (68) Limb large, more than 5 cm long	............................C. evac
68      Limb 2.5 to 4 cm long............................................69
69 (70) Limb uniformly colored yellow .........................C. siamensis
70      Limb not uniformly colored ......................................71
71 (72) Limb yellow, at the tip with small red warty dots ........C. zonala
72      The surface of limb yellow, scattered with brown or pink
        areas .................................................C. didericti
73	Limb and throat not bright yellow, usually purple, rarely
        dull brown-yellow .......................................C. cordata
74	Throat not funnel-shaped ........................................75
75 (76) Blades smooth, limb vermilion red ........................C. hejnyi
76	Blades blistered, limb orange-brown  ....................C. zukalii 
				
		 
			 
										 
 
		