Cryptocoryne

Some Cryptocoryne are popular commercially cultivated aquarium plants. Submerged plants reproduce vegetatively, emerse plants may flower and reproduce sexually. Many species are cultivated only by dedicated experts and are very hard to grow, or are not present in a culture at all. Some species are endangered because their natural habitats are disappearing. On the other hand, some water trumpets (e.g. Cryptocoryne beckettii) are very hardy aquarium plants, easy to grow to the point that they have become an invasive species after being introduced in Florida in North America.[2]

Cryptocoryne is either found in peat bogs or on limestone; the latter do well in most aquaria, the former must have soft water to survive and need decomposing beech leaf litter to do well. C. striolata, while found primarily in peat bogs, has also been found growing on limestone. Borneo is home to many endemic crypts previously thought to grow only in tea-colored soft acid water emulating peat bogs but exploration of habitats from 2005 to 2010 showed about half grew on limestone as well. These hardwater Cryptocorynes are generally the easier ones to keep (in fact, some species, such as Cryptocoryne wendtii are said to be among the most versatile of aquarium plants); they tolerate low or bright light but grow faster in more intense light. This water plant's range is around 12 to 33 °C, and slightly alkaline to neutral pH.

Plants of the genus Cryptocoryne, which range from India to New Guinea are found in very diverse conditions. Some are true acid loving plants such as C. pallidnerva, found in peat bogs in Borneo, while others such as C. crispatula var. balansae and C. pontiderifolia are found in streams with limestone beds—hard alkaline water. One species, C. ciliata is even found in semi-brackish water in some areas. It is one of the few aquarium plants that tolerates salt concentrations.

Cryptocoryne plants have been in cultivation in the aquarium hobby since the late 18th century, although it was not until the 1960s that more than a handful of species was known and became more common in the hobby. New species still regularly crop up as interest in these plants widens and more collecting expeditions by private parties are carried out.

A phenomenon often encountered when planting new crypts in an aquarium is commonly called Crypt melt, whereby the plant loses all its leaves.[3] There seem to be two possible causes for this.

Rapid environmental change is thought to trigger this, as these plants do not seem to adapt well to transplantion, and may need 30 days or so to become established and for the leaves to regrow. Experienced growers report that it is better to plant crypts in aquariums that have been established for at least three months.

In the wild, crypts can grow fully submerged underwater, but in some plant nurseries they are often grown emersed and crypt melt could then be triggered by the change from emerse to submerse conditions.

There is lately a trend for such nurseries to send crypts as just a rootstock (i.e. without the leaves) to reduce shipping costs and because the leaves will be lost anyway once planted in an aquarium.

Other reports[4] emphasise the need to change the aquarium water regularly to prevent the buildup of nitrates which are thought to trigger this condition (often referred to as a disease).

1. Cryptocoryne affinis N.E.Br. in J.D.Hooker - Thailand, Malaysia
2. Cryptocoryne alba de Wit - Sri Lanka
3. Cryptocoryne albida R.Parker - southern China, eastern India, Bangladesh, Indochina
4. Cryptocoryne annamica Serebryanyi - Vietnam
5. Cryptocoryne aponogetifolia Merr. - Philippines
6. Cryptocoryne aura - West kalimantan
7. Cryptocoryne auriculata Engl. - Sarawak, Philippines
8. Cryptocoryne bangkaensis Bastm. - Sumatra
9. Cryptocoryne beckettii Thuill. ex Trim. - Sri Lanka; naturalized in Texas
10. Cryptocoryne bogneri Rataj - Sri Lanka
11. Cryptocoryne bullosa Becc. - Sarawak
12. Cryptocoryne ciliata (Roxb.) Schott - India, Bangladesh, Indochina, Malaysia, Indonesia, New Guinea, Philippines
13. Cryptocoryne cognata Schott - India
14. Cryptocoryne consobrina Schott - India
15. Cryptocoryne cordata var. cordata Griff. - Malaysia
16. Cryptocoryne cordata var. siamensis Griff. - Thai
17. Cryptocoryne cordata var. diderici Griff. - Sumatra
18. Cryptocoryne cordata var. grandis Ridl. - Northeast Borneo
19. Cryptocoryne cordata var. grabowskii Engl. - South Kalimantan
20. Cryptocoryne cordata var. zonata de Wit. - Sri Aman
21. Cryptocoryne coronata Bastm. & Wijng. - Philippines
22. Cryptocoryne crispatula var. crispatula Engl. - Southeast Asia
23. Cryptocoryne cruddasiana Prain - Myanmar
24. Cryptocoryne decus-silvae de Wit - Johor
25. Cryptocoryne dewitii N.Jacobsen - Papua New Guinea
26. Cryptocoryne purpurea nothovar. edithiae de Wit - South Kalimantan
27. Cryptocoryne elliptica N.E.Br. - Malaysia
28. Cryptocoryne ferruginea Engl. - Sarawak
29. Cryptocoryne fusca de Wit - Borneo
30. Cryptocoryne griffithii Schott - Kalimantan, Peninsular Malaysia
31. Cryptocoryne hudoroi Bogner & N.Jacobsen - Kalimantan
32. Cryptocoryne ideii Budianto - Kalimantan
33. Cryptocoryne jacobsenii de Wit - Sumatra
34. Cryptocoryne joshanii Naive & Villanueva - Philippines
35. Cryptocoryne keei N.Jacobsen - Sarawak
36. Cryptocoryne lingua Becc. ex Engl - Sarawak
37. Cryptocoryne loeiensis Bastm., T.Idei & N.Jacobsen - Laos, Thailand
38. Cryptocoryne longicaudaBecc. ex Engl. - Borneo, Malaysia, Sumatra
39. Cryptocoryne mekongensis T.Idei, Bastm. & N.Jacobsen - Cambodia, Laos, Thailand
40. Cryptocoryne minima Ridl. - Malaysia, Sumatra
41. Cryptocoryne moehlmannii de Wit - Sumatra
42. Cryptocoryne nevillii Trimen - Sri Lanka
43. Cryptocoryne noritoi Wongso - Kalimantan
44. Cryptocoryne nurii var. nurii Furtado - Peninsular Malaysia
45. Cryptocoryne nurii var. raubensis N.Jacobsen - Peninsular Malaysia
46. Cryptocoryne pallidinervia Engl. - Borneo
47. Cryptocoryne parva de Wit- Sri Lanka
48. Cryptocoryne pontederiifolia Schott - Sumatra
49. Cryptocoryne purpurea nothovar. purpurea Ridl. - Peninsular Malaysia
50. Cryptocoryne purpurea nothovar. sarawakensis Yosuke Kobayashi - sarawak
51. Cryptocoryne purpurea nothovar. borneoensis N.Jacobsen , Bastm. - Central Kalimantan
52. Cryptocoryne pygmaea Merr. - Philippines
53. Cryptocoryne retrospiralis (Roxb.) Kunth - Bangladesh, India, Myanmar
54. Cryptocoryne schulzei de Wit - Johor
55. Cryptocoryne scurrilis de Wit - Sumatra
56. Cryptocoryne sivadasanii Bogner - southern India
57. Cryptocoryne spiralis (Retz.) Fisch. ex Wydler - Bangladesh, India
58. Cryptocoryne striolata Engl. - Borneo
59. Cryptocoryne thwaitesii Schott - Sri Lanka
60. Cryptocoryne timahensis Bastm. - Singapore (C. cordata × C. nurii)
61. Cryptocoryne uenoi Yuji Sasaki - Sarawak
62. Cryptocoryne undulata Wendt - Sri Lanka
63. Cryptocoryne usteriana Engl. - Philippines
64. Cryptocoryne versteegii Engl. - New Guinea
65. Cryptocoryne vietnamensis I.Hertel & H.Mühlberg - Vietnam
66. Cryptocoryne villosa N.Jacobsen - Sumatra
67. Cryptocoryne walkeri Schott - Sri Lanka
68. Cryptocoryne wendtii de Wit - Sri Lanka
69. Cryptocoryne × willisii Reitz - Sri Lanka (C. parva × C. walkeri)
70. Cryptocoryne yujii Bastm. - Sarawak
71. Cryptocoryne zaidiana Ipor & Tawan - Sarawak
72. Cryptocoryne zukalii Rataj - Peninsular Malaysia