Chromosome Counts of Latin American Compositae

Sundberg, Scott; Cowan, Clark P.; Turner, B. L.

doi:10.1002/j.1537-2197.1986.tb09677.x

Cited by 25 publications

(14 citation statements)

References 12 publications

(7 reference statements)

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“…In spite of the large advances in molecular phylogeny, chromosome information can still provide useful data for the determination of the relationships and taxonomic position of Asteraceae species (Carr et al ., 1999). In this field, many general contributions reporting chromosome number, ploidy level, and meiotic behaviour of members of the Asteraceae have been carried out (Coleman, 1968; Grashoff, Bierner & Northington, 1972; Solbrig et al ., 1972; Turner et al ., 1979; Robinson et al ., 1981; Sundberg, Cowan & Turner, 1986; Keil, Luckow & Pinkava, 1988; Hunziker et al ., 1989; Carr et al ., 1999; Strother & Panero, 2001). In this paper, we present 42 chromosome number determinations for 39 species of Asteraceae belonging to the tribes Astereae (two), Eupatorieae (13), Helenieae (three), Heliantheae (four), Inuleae (one), Mutisieae (one), Senecioneae (five), and Vernonieae (ten).…”

Section: Introductionmentioning

confidence: 99%

Chromosome studies on some Asteraceae from South America

Dematteis

Molero

Angulo

et al. 2007

Botanical Journal of the Linnean Society

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Mitotic or meiotic chromosome numbers for 42 accessions belonging to 39 species of different genera of Asteraceae were determined. First chromosome counts are reported for one genus ( Gymnocoronis ), 14 species, and one variety. These are as follows: Solidago chilensis var. megapotamica (2 n = 2 x = 18), Chromolaena barbacensis (2 n = 3 x = 30), Chromolaena christieana (2 n = 3 x = 30), Chromolaena hirsuta (2 n = 4 x = 40), Chromolaena verbenacea ( n = 20 II, 2 n = 4 x = 40), Disynaphia multicrenulata (2 n = 2 x = 20), Gymnocoronis spilanthoides var. subcordata (2 n = 2 x = 20), Mikania thapsoides (2 n = 4 x = 68), Stevia commixta (2 n = 2 x = 22), Porophyllum brevifolium (2 n = 4 x = 44), Viguiera rojasii (2 n = 2 x = 34), Pterocaulon angustifolium (2 n = 2 x = 20), Gochnatia haumaniana (2 n = 4 x = 44), Senecio ostenii (2 n = 4 x = 40), Senecio pinnatus (2 n = 8 x = 80), and Lepidaploa amambaia (2 n = 2 x = 28). Chromosome numbers differing from those reported previously in the literature were found in Campuloclinium macrocephalum (2 n = 2 x = 20), Melanthera latifolia (2 n = 4 x = 60), Chrysolaena flexuosa (2 n = 2 x = 20), and Cyrtocymura cincta (2 n = 4 x = 40). The relevance of the results is discussed in relation to the available data for each of the analysed taxa.

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Section: Introductionmentioning

confidence: 99%

Chromosome studies on some Asteraceae from South America

Dematteis

Molero

Angulo

et al. 2007

Botanical Journal of the Linnean Society

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“…Some new reports with karyological details and a review of other sources were provided by Ruas et al (1991). Papers cited by Ruas et al included Cabrera (1944), Coleman (1968), Hunter (1964), Jones (1968Jones ( , 1970Jones ( , 1974Jones ( , 1977Jones ( , 1982b, Jones and Duncan (1966), Keeley (1978), Keeley and Jones (1977a), Powell et al (1974), Sundberg et al (1986), and Turner (1981). A basic pattern of x = 9 or 10 for paleotropical Vernonieae and x=16 or 17 for American Vernonieae was first mentioned by Jones (1977).…”

Section: Distinguishing Features Of the Vernonieaementioning

confidence: 99%

Generic and subtribal classification of American Vernonieae /

Robinson¹

1999

179

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A B S T R A C TRobinson, Harold. Generic and Subtribal Classification of American Vernonieae. Smithsoniun Contributions to Botany, number 89, 116 pages, 1999.-The Vernonieae in America is herein defined to exclude the Liabeae and Pseudostifftiu (Moquinieae), and to include elements sometimes placed in the Heliantheae (Trichospiru) or Lactuceae (Stokesiu). Pollen, style bases, raphids, inflorescence form, involucre, anther appendage, and chemistry are some characters used in the reclassification. Tables 1-12 indicate the distribution of these characteristics in most American genera. Vernoniu s.s., with type A pollen, is typified by K noveborucensis (L.) and occurs in the Bahamas, eastern North America, south to central Mexico and has two species in temperate South America. All other species previously placed in Vernoniu need to be removed from the genus, a process that is nearly complete for neotropical species. Most American Vernonieae seem to form a single related subgroup in the tribe. Subtribes included in the related subgroup are the Lychnophorinae (x = 15, 17, 18) and Centratherinae (x = 16) with type A pollen and hroheliangolides; Piptocarphinae (x= 17) with type A pollen, deciduous inner involucre, and sometimes opposite leaves; Vernoniinae (x = 17), many with glanduliferous anther appendages (including the Lepiduplou complex mostly with echinolophate pollen); and the newly proposed subtribes Sipolisiinae with type A pollen, armed receptacles, and carbonized achenes; Chrestinae with echinolophate pollen; and Leiboldiinae ( x = 19) with type A pollen, large heads, and a modified callus at the top of the achene. Of uncertain relationship to the preceding related subgroup are Stokesiu (x = 7), the Elephantopodinae (x = 1 1, 13), and the Rolandrinae (x = 8) with echinolophate pollen; three genera with type E pollen (Pucourinu, Acilepidopsis, and Mesunthophoru); and the Trichospirinae with type A pollen and flattened bicornute achenes. Ten subtribes are recognized, plus four unplaced generic groups. Three of the subtribal names, Leiboldiinae, Chrestinae, and Sipolisiinae are validated in the treatment. The genus Cuutingunthus of eastern Brazil, a possible relative of the Elephantopinae, is described as new. A list of the 76 accepted genera of Vernonieae, native or introduced in the New World, is provided, and a complete list of names of American Vernonieae is given with an indication of their present taxonomic dispositions and geographical distributions. Fifteen new combinations are provided.

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“…C. Jeffrey (ϵ Senecio sanguisorbae DC. Sundberg, Cowan, and Turner (1986) reported ''2n ϭ ca. 12 II'' for var.…”

Section: Methodsmentioning

confidence: 99%

“…Robinson et al (1981) reported two counts of ''n ϭ 40'' and ''n ϭ c. 40'' for V. cordata. Yet, Strother (1983) reported 2n ϭ c. 51 II (hexaploid on x ϭ 17) and Sundberg, Cowan, and Turner (1986) reported 2n ϭ c. 34 II (tetraploid on x ϭ 17) for V. cordata. The…”

Section: Schistocarpha Bicolormentioning

confidence: 98%

Chromosome studies: Mexican Compositae

Strother

Panero

2001

American J of Botany

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Chromosome observations reported here from 70 collections representing 65 species from 40 genera of Compositae (mostly Heliantheae) provide taxonomically useful information. First counts for 28 species, including the first count for Psacaliopsis, may prove to be especially interesting in relation to phyletic and taxonomic alignments of the taxa. Of special interest among first reports is 2n ϭ 5 II for Stevia lita; other stevias have x ϭ 11, 12, or 17. Thirteen of our counts differ from prior reports and may also be of particular interest in phyletic and taxonomic contexts.

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Chromosome Counts of Latin American Compositae

Cited by 25 publications

References 12 publications

Chromosome studies on some Asteraceae from South America

Chromosome studies on some Asteraceae from South America

Generic and subtribal classification of American Vernonieae /

Chromosome studies: Mexican Compositae

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