the crypts pages

Cryptocoryne bogneri Rataj

Click on the picture to get the full image (ca 50 k)

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The type of C. bogneri  with the typical limb which is slightly bent forwards.
coll. Bogner 484 (1973)
photo Bogner		 Another picture of the biotope where C. bogneri grows. The plant grows in very dark places in the forest.
coll. Waser 02-1
photo Waser		 Again the dark forest in the South West of Sri Lanka. Note the rather round shaped, heart form based leaves in green to brown.
coll. Waser 90-2
photo Waser		 The leaves are more or less glossy, in contrast to the dull surface of C. alba or the sandpaper-like leaves of C. thwaitesii.
coll. Waser 96
photo Waser
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A view on the back of the limb of the spathe. The small tail is at the end of the limb is sometimes less pronounced.
coll. Waser 96
photo Waser		 An emersed cultivated specimen of C. bogneri with a rather short limb of the spathe. The limb is smooth, towards the edges a bit warty.
unknown coll.
photo Jacobsen		 The leaf coloring varies between green and brown. The bud is like a upright spike with a dark tip.
coll. Waser 02-1
photo Bastmeijer

 

 The full spathe of C. bogneri. Note the short tube, the absence of a collar and the warty margin of the limb.coll. coll. Waser 02-1
photo Bastmeijer
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A few years ago, another form of C. bogneri was collected from a locality far away from the type locality. The length of the tube is much longer.
coll. Kawashima
photo Kawashima		 The leaves of the ´long tube´ form are not to distinguish from the other form.
coll. Kawashima
photo Kawashima		 The lower part of the spathe opened to show the male and the female flowers.
coll. Waser 02-1
photo Bastmeijer		 The limb of the spathe in close-up. The color is bright yellow. No color variations are known today.
coll. Waser 02-1
photo Bastmeijer
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A by Mr. Kaburagi (JP) cultivated specimen of  the new long tubed form. The limb of the spathe seems to be too far opened.
unknown coll.
photo Kaburagi		 Note the small tail of the spathe. The margins of the leaves in C. bogneri varies from fine undulated to a bit crispy.
unknown coll.
photo Kaburagi		 Detailed drawing of C. bogneri in de Wit (1990).The leaves are less broad and the limb is rough only in the top.
drawing Ike Zewald		 Distribution of C. bogneri in the South West of Sri Lanka, together with C. alba and C. thwaitesii.

A rare Cryptocoryne from the South Western rainforest of Sri Lanka. For a long time there were only a few localities known where only a few plants were growing. Recently a new locality is found with a more elongated tube of the spathe. There only exists a very small amount of these plants in nature, so it is probably one of the most threatened Cryptocoryne!
C. bogneri difficult to grow on the long term and is not suited for the aquarium.Compared to the other Cryptocoryne from the South Western part of  Sri Lanka, C. bogneri is the most difficult species to cultivate. C. thwaitesii is intermediate, while C. alba is relative easy to grow. As Kasselmann (2003)   pointed out, C. bogneri grows in water with a very low conductivity (EC = 22 muS/cm) and a moderate pH (5-7). My experience is that C. bogneri grows reasonable well emersed in water with an conductivity of around 200 muS/cm and a pH of ca 5.

Jan D. Bastmeijer, updated June 2004

Literature:

Arends, J.C., Bastmeijer, J.D. & Jacobsen, N., 1982. Chromosome numbers and taxonomy in Cryptocoryne (Araceae).II. Nord.J.Bot. 2 : 453-463.
Bogner, J., 1974. Reisindrukken uit India en Ceylon. Het Aquarium 44(8) : 210-213.
Bogner, J., 1980. Tropische Wasserpflanzen am natürlichen Standort. Int.Waterplanten Symp. Ludwigia, Wageningen : 51-55.
Eggers, G., 1994. Sri Lanka 2. Lagenandra- und Cryptocoryne-Arten. Aqua-Planta 1-94 : 20-28.
Graaf, A.de, 1981. De Cryptocorynen van Sri lanka.Het Aquarium 51(10) : 276-279.
Graaf, A.de & Arends, J.C., 1986. The occurrence of Cryptocoryne and Lagenandra (Araceae) on Sri Lanka. Nord.J.Bot. 6 : 757-764.
Graaf, A.de, 1987. Die Verbreitung von Cryptocoryne und Lagenandra (Araceae) auf Sri Lanka. Das Aquarium 221 : 571-575.
Jacobsen, N., 1976. Notes on Cryptocoryne of Sri Lanka (Ceylon). Bot.Notiser 129 : 179-190.
Jacobsen, N., 1977. Zytologie und Taxonomie der Cryptocorynen Sri Lankas. Aqua-Planta 4-77 : 3-8.
Jacobsen, N., 1977. Chromosome numbers and taxonomy in Cryptocoryne (Araceae). Bot.Notiser 130 : 71-87.
Jacobsen, N., 1982. Cryptocorynen. Alfred Kernen Verlag, Stuttgart.
Jacobsen, N., 1986. Deterioration of the habitats of the Cryptocoryne species. Symp.Bedreiging van het aquatisch milieu, Ludwigia, Wageningen : 33.
Jacobsen, N., 1987. Cryptocoryne. A Revised Handbook to the Flora of Ceylon, Vol. VI: 85-99.
Kasselmann, C., 1995. Aquarienpflanzen. Ulmer, Stuttgart.
Kasselmann, C., 2003. Bogners Wasserkelch - neue oekologische Erkenntnisse. DATZ 56(11): 26-31.
Möhlmann, F., 1977. Die ceylonesischen Cryptocoryne-Arten. Aqua-Planta 1-77 : 8-9.
Möhlmann, F., 1993. Die Cryptocoryne-Arten Ceylons (1). Aqua-Planta 4-93 : 123-128.
Mühlberg, H., 1980. Das grosse Buch der Wasserpflanzen. Dausien, Hanau.
Rataj, K., 1975. Revision of the genus Cryptocoryne Fischer. Studie CSAV, c.3.Praha.
Rataj, K. & Horeman, T.J., 1977. Aquarium Plants. TFH Publ", USA.
Wit,H.C.D.de, 1975. Cryptocoryne alba de Wit (nov.sp.) en Cryptocoryne bogneri de Wit (nov.sp.). Het Aquarium 45(12) : 326-327.
Wit, H.C.D.de, 1990. Aquarienpflanzen, 2. Auflage. Ulmer, Stuttgart. ISBN 3-8001-7185-6.