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Chromosome Numbers and Taxonomy in Cryptocoryne (Araceae)

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Chromosome Numbers and Taxonomy in Cryptocoryne (Araceae) Chromosome numbers and taxonomy in Cryptocoryne (Araceae). II J. C. Arends, J. D. Bastmeijer and N. Jacobsen Arends, J. C, Bastmeijer, J. D. & Jacobsen, N. 1982. Chromosome numbers and taxonomy in Cryptocoryne (Araceae). II. - Nord. J. Bot. 2: 453^f63. Copenhagen. ISSN 0107-055X. Chromosome numbers for 38specie so f Cryptocoryne are reported, 16o fwhic h have not been reported earlier. About 90% of the specieso f Cryptocoryne have nowbee n investigated cytologically. On the basis of chromosome numbers, morphology, and distribution, it is possible to distinguish some 24 groups within the species investi­ gated.Th echromosom e numbers represent aheteroploi d serieswhic h isbase d on the (secondary) base numbers 10, 11, 14, 15, 17,an d 18.Evidenc e isgive n that 2n = 36 isth e more primitive one.Evolutio n on thechromosom e level hasmos t likelygon ei n the direction of a reduction in numbers. Two new species, Cryptocoryne amicorum De Wit & N.Jacobse n and C. keei N. Jacobsen, are described. J. C. Arends, Deptof PlantTaxonomy and Plant Geography, Agricultural Univ., P.O. Box 80JO, 6700 ED Wageningen, The Netherlands. J. D. Bastmeijer, OudeRoswin- kelerweg72, 7822 AG Emmen, The Netherlands.N. Jacobsen,Jnst. of Systematic Botany, Gothersgade J40, DK-JJ23 Copenhagen K, Denmark. posited at C and of the Bastmeijer collections at WAG. Introduction Herbarium specimens have been studied from the This paper is a continuation of previous studies in following herbaria: B, BK, BKF, C, CAL, CAMB, E, Cryptocoryne (Jacobsen 1976, 1977, 1980a). FI, G, GH, K, KLU, L, LAE, LD, M, MO, NY, P, SAR, SING, US,W ,WAG , and Z. Herbarium material from these herbaria was also used for the determina­ tions and the distributions given in Jacobsen (1977). Material and methods Many specimens were kindly provided for investigation by several colleagues. Part of the material wascollecte d in Sarawak and the Malay peninsula during a collection Chromosome numbers tour in September 1978. A description of some of the Cryptocoryne striolata Engl. 2n = 20 localities in Sarawak was given in Schulze (1971), and C. gracilis De Wit, C. "ongii" (Tomey 1978). Jacobsen (1979a). At the Copenhagen laboratory root tips were pre- Material: Malaysia, Sarawak: Kpg. Panchor, NJ 78-1; 6 miles treated in a-monobrome-naphtalene, fixed in lactid Pakan - Entabai, NJ 78-3;4 miles Pakan - Sarikei, Ni 78-4; Sg.Entabai , NJ 78-5; Sg.Selalang ,N J 78-8;7 0 milesKuchin g acid at 0°C,staine d inpyronin e following the method of - Simmanggang, NJ 78-12;Bat u Besai, NJ 78-18; Kpg. Mon- Jacobsen (1957), and squashed with a plastic cover slip kus, NJ 78-52. method described by Östergreen & Heneen (1962). At the Wageningen laboratory the orcein staining method Arends & Laan (1979) reported the same number. as outlined by Arends & Laan (1978) was employed. There hasbee n some uncertainty ast o the identity ofC . Voucher specimens of the Jacobsen collections are de- striolatabecaus e the type specimen (Beccari 1240, FI) © NORDIC JOURNAL OFBOTAN Y NORD. J. BOT. 2:453-463 , TROP04 3 30 Nord.J . Bot. 2 (5) 1982 453 had alim bo f the spathe whichha d notopened . Material Sarkar et al. (1979) reported 2n = 90 for this species. collected in Sarawak in 1978,however , leaves no doubt The material collected by C. D. K. Cook at Pivavan as to the identity of the species. The characteristic proved to consist of two different forms. They had a "striateness" found on the leaves of the type specimen different leaf-form, and the plants with 2n = 33 flow­ was best seen in dried specimens and was not always ered very quickly. There are no data concerning their present. distribution at the locality where they were collected. The limb of the spathe lacked a collar, but a collar The plants with 2n = 33ar e no doubt haploids of plants zone wasindicate d by amor e or lessdark ,purpl e colour with 2n = 66, while the plants with 2n = ca. 132 are which could also consist of a more or lessdensel y spot­ "tetraploids" of plants with 2n = 66. ted area. The upper part of the limbma y beo f the same colour as the collar, or more yellowish. Cryptocotyne beckettii Trimen 2n = 28 C.petchii Alston. Cryptocoryne keei N. Jacobsen sp. nov. 2n = 20 Material: Sri Lanka: Halloluwa, NJ 23-9. Folia 10-40 cm longa, lamina anguste ovata, obscure viridi,vald ebullosa , subtus saepe striata. Spatha circiter 5 cm longa, limbo circiter 2 cm longo, anguste ovato, plusminu s cucullato, purpureo, plusminu slaevi , collari Cryptocoryne walkeri Schott 2n = 42 nullo. Stigma ovatum; corpora olfactoria irregulariter C.lutea Alston,C. lutea Alston var.minor Alston,C. legroi De lobata, plus minus connata. Wit, C. walkeri Schott var. lutea (Alston) Rataj, C. walken Schott var. legroi(D e Wit) Rataj. Typus: Hnery Ong Kee Chuan s.n., prope oppidum Bau, Sarawak (C holotypus, WAG isotypus). Material: Cult.: NJ 2957. Material: Malaysia, Sarawak: Bau, September 1978, NJ 78-53. Thisi sa triploi d cytotypeo f the form witha broa d collar zone which formerly has been recorded with 2n = 28. Material collected near Banjarmasin, Indonesia, (leg. The taxonomie relationships between C. walkeri and C. Stroh (= NJ 3123), leg. Korthaus (= Bast 398, = NJ lutea have been problematic, the main character being 3243)) resembles C. keei inth e vegetative parts and has the collar zone versus a pronounced collar. However, a 2n = 20. It is not certain if this Banjarmasin material renewed study of the available material proved that iti s belongst oC. keei. Inflorescences ofC. keei,onl y known not possible to distinguish between the various forms. from herbarium material, indicate relations with C. striolata. Cryptocoryne wendtii De Wit 2n = 28, 42 Material: 2n = 28. Sri Lanka: Uhomia, Kurunegala to Negumbo, leg. Windelov (= NJ 3211, 3212); Vigaya Para, Cryptocoryne ciliata (Roxb.) Schott 2n = 22,3 3 Anuradhapura, leg. WindeUäv (= NJ 3213); Malvatu Oya, C.elata Griff. , C.drymorrhiza Zipp. , nom. nud. Anuradhapura, leg. Windelcv (= NJ 3214-3217); Attwa, Kurunegala to Puttalam, leg. WindeUav (= NJ 3220); Ride Material: 2n = 22. Thailand: Nan Lumliang, NJ 77-100. — Bandi Ella, Dendru Oya, leg. Windelov (= NJ 3221,3222) . - Malaysia, Sarawak: Kuching, NJ 78-34; 12.5 miles Batu Cult.:N J 2930; NJ 2959; NJ 3106. Kitang-Bau, NJ 78-39; Kpg. Stutong, NJ 78-45. - Johore: 2n = 42.Sri Lanka: Galgamuwa, MiOya ,leg .WindeUs v( = NJ Kota Tinggi, NJ 78-56.- Cult.:N J 3047. 3210); Nikowerotiya, Kurunegala to Puttalam, leg. Windelev 2n = 33.Malaysia, Sarawak: Kpg. Stutong, NJ 78-46. (= NJ 3218); Talgalla, Maho to Padeniya, leg. Windelov (= NJ 3219). At the locality at Kpg. Stutong, Sarawak, diploid and triploid forms were growing together in abundance. A Cryptocoryne undulata Wendt 2n = 28, 42 very narrow-leaved form, supposed to come from the C. willisii Baum, C.axelrodii Rataj. Malay peninsula (NJ 3047), also proved to have 2n = 22. Material: 2n = 28.Cult.: NJ 3178; NJ 3179; NJ 3231. 2n = 42: Cult.: NJ 3232. Cryptocoryne spiralis (Retz.) Wydler 2n = 33, 66, andca . Cryptocoryne x willisii Reitz 2n = 28 132 C.nevillii auct . (see Jacobsen 1976), C. lucensD e Wit. C. huegeliiSchott , C. tortuosaBlatt . & McCann. Material: Cult: Bast 28. Material: 2n = 33.India: Pivavan, leg. Cook (= NJ 3129a). 2n = 66. India: Qvilandi, leg. Cook (= NJ 3125); Madokal, Hybridization experiments have shown that C. x willisii Savantwadi, leg. van der Maessen (= NJ 3166); Goa - Kar- nataka, leg van der Maessen (= NJ 3167); Goa - Belgaum, is a hybrid complex with C. beckeitii/C.walkeri a s one leg. van der Maessen (= Bast 405). of the parents and C. parva as the other (Jacobsen 2n = ca. 132.India: Pivavan, leg. Cook (= NJ 3129b). 1981). 454 Nord.J . Bot. 2 (5) 1982 Cryptocoryne scurrilis De Wit 2n • 68 Cryptocoryne nevillii Hook. f. 2n = 28 Material: Cult.: NJ 3070; Bast 395. Non C. nevilliiauct . (see Jacobsen 1976). Jacobsen (1979a, b) erroneously reported the chromo­ Material: Sri Lanka: 25 miles N Batticaloa, Nicolson 4268 (= NJ 3093). some number as 2n = 60 for C. scurrilis. There has been some uncertainty regarding the identity Cryptocoryne minima Ridley 2n = 34 of this species (cf. Jacobsen 1976, 1981). However, since the collection made by Kundu & Balakrishnan Material: Cult.:N J 3103; NJ 78-66; NJ 78-68. (no. 185), near Batticaloa in 1970, several other collec­ tions have been made in this part of the island, (e.g. Cryptocoryne griffithii Schott 2n = 34 Davidse & Sumithrarachchi 9032, at milepost 25 from Batticaloa towards Trincomalee) and they show that the Material: Cult.:N J 3224. conclusions in Jacobsen (1976) were correct. The specimens collected by Nicolson were fruiting plenti­ Cryptocoryne zukalii Rataj 2n = 34 fully. Material: Cuil.:N J 3162. Cryptocoryne moehlmannii De Wit 2n = 30 Cryptocoryne jacobsenii De Wit 2n = 34 Material: Sumatra: SimpangEmpa t and Sasok, leg. Jahn (= NJ Material: Cult.:N J 2997; NJ 3131. 3088 = Bast 285). Cryptocoryne diderici De Wit 2n = 34 Cryptocoryne longicauda Engl. 2n = 30 Material: Cult.:N J 78-67. C. caudata N.E. Br., C.johorensis Engl. Material: Malaysia, Johore: Gunong Pulai, leg. Bogner (= NJ Cryptocoryne cordata Griff. 2n = 34, 68, 85, 102 3109). - Sarawak: Sg. Dor, NJ 78-13; Kpg. Tekalong, NJ 78-17; Sg. Engkramut, NJ 78-21; Kgp. Stutong, NJ 78-47; E C. blassiiD e Wit, C. evae Rataj var. evae, C. evae Rataj var. of Serian, NJ 78-48.- Cult.:Bas t 208. recordataRataj , C. kerrii Gagnep., C.siamensis Gagnep., C. stonei Rataj. Arends & Laan (1979) reported the same number. Material: 2n = 34. Thailand:Sg . Kolok, N of Naratiwat, leg. The authors agree with Rataj (1975) that C. lon­ Scholier (= NJ 3238).
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