Chromosome numbers and taxonomy in Cryptocoryne (Araceae). II |
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| Authors: | J C Arends J D Bastmeijer N Jacobsen |
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| Institution: | Dept of Plant Taxonomy and Plant Geography, Agricultural Univ., P.O. Box 8010, 6700 ED Wageningen, The Netherlands;Oude Roswinkelerweg 72, 7822 AG Emmen, The Netherlands;Inst. of Systematic Botany, Gothersgade 140, DK–1123 Copenhagen K, Denmark |
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| Abstract: | Chromosome numbers for 38 species of Cryptocoryne are reported, 16 of which have not been reported earlier. About 90% of the species of Cryptocoryne have now been investigated cytologically. On the basis of chromosome numbers, morphology, and distribution, it is possible to distinguish some 24 groups within the species investigated. The chromosome numbers represent a heteroploid series which is based on the (secondary) base numbers 10, 11, 14, 15, 17, and 18. Evidence is given that 2n = 36 is the more primitive one. Evolution on the chromosome level has most likely gone in the direction of a reduction in numbers. Two new species, Cryptocoryne amicorum De Wit & N. Jacobsen and C. keei N. Jacobsen, are described. |
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