The Floral Morphology of the Polemoniaceae

Dawson, Marion L.

doi:10.1002/j.1537-2197.1936.tb09015.x

Cited by 16 publications

(4 citation statements)

References 13 publications

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“…Evolutionary relationships and classification within this family have long been controversial (Bentham 1845;Gray 1870;Kuntze 1891;Brand 1907;Rydberg 1913;Dawson 1936;Wherry 1940;Mason and Grant 1948;Grant 1959;Cronquist 1984;Day and Moran 1986). Although generally considered a "natural" group by most authors, generic and species relationships within the family have remained obscure: the circumscription of species, genera and higher taxonomic groups differing radically from author to author.…”

Section: Introductionmentioning

confidence: 99%

Phylogeny of Polemoniaceae Based on Nuclear Ribosomal Internal Transcribed Spacer DNA Sequences

Porter¹

1996

aliso

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Nuclear ribosomal internal transcribed spacer (ITS) DNA sequences are used to estimate the phylogeny of 53 members of Polemoniaceae, representing all but two genera of the family. Fitch parsimony analysis of equal-weighted nucleotide sites result in 1080 minimal-length trees. However, when alignment-ambiguou s positions are removed and an II: 10 transition to transversion weighting is imposed only eight trees are found. These data are used to address two issues: I) patterns of diversification in Polemoniaceae, and 2) the circumscription and monophyly of the genus Cilia. Although the monophyly of Polemoniaceae is well supported, relationships inferred among the earliest diverging lineages are altered by character weighting, treatment of indels, and taxon inclusion. In spite of the lack of reliable resolution at the basal nodes, ITS data provide evidence that Cilia, as currently interpreted, is polyphyletic and comprises at least five independent lineages.

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Section: Introductionmentioning

confidence: 99%

Phylogeny of Polemoniaceae Based on Nuclear Ribosomal Internal Transcribed Spacer DNA Sequences

Porter¹

1996

aliso

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“…Consequently, this state is given various interpretations (cf. Eichler 1875;Dawson 1936;Corner 1946 a.0.). The most plausible interpretation was, in our opinion, put forward by Stroebl(l925); it was confirmed afterwards by Leins (1964a), Gelius (1967), Eckert (1966) and Mayr (1969).…”

Section: Introductionmentioning

confidence: 99%

The distribution and the systematic relevance of the androecial characters oligomery and polymery in the Magnoliophytina

Decraene

Smets

1987

Nordic Journal of Botany

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. 1987. The distribution and the systematic relevance of the androecial characters oligomery and polymery in the Magnoliophytina.-Nord. J. Bot. 7: 23!2-253. Copenhagen. ISSN 0107-055X.In the system of classification sensu Cronquist, the division between the two subclasses Dilleniidae and Rosidae relies on only a few characters. The major distinguishing character is the occurrence of centripetal or centrifugal sequence of stamen development. We question not only the application and the value of this character, but also the maintenance of the Rosidae and Dilleniidae as separately derived natural taxa, because of the lack of solid distinguishing criteria. We have studied the stamina1 characters in the 192 families of the Dilleniidae and the Rosidae, using Dahlgren's classification diagram. The study focussed on the following androecial characters: 1) polyandry; i.e. spiral polyandry, complex polyandry (viz. centrifugal, centripetal and lateral polyandry) and cyclic polyandry 2) diplostemony and obdiplostemony 3) haplostemony and obhaplostemony .In our proposal only two characters are maintained, namely oligomery (diplostemony s.1.) and polymery (true polyandry %I.), both having a number of character states. Polyandry, as it has been described up to now, is not to be regarded as homologous in all Magnoliophytina. Both characters correspond to two different lines within the Magnoliatae. In addition, the division between the Dilleniidae and Rosidae sensu Cronquist is no longer tenable. Finally, a number of modifications of Dahlgren's diagram are suggested and a division of the Magnoliophytina in a polymerous group and an oligomerous group is proposed. The Dilleniidae-Rosidae complex is included in the oligomerous group.

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“…, Polemoniaceae (Dawson, 1936), Primulaceae (Dick son, 1936Douglas, 1936), Polygonaceae (Laubengayer, 1937), and Boraginaceae (Lawrence, 1937) xxi,…”

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confidence: 99%

The Floral Anatomy of the Aurantioideae

Tillson

Bamford

1938

American J of Botany

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Citrinae Microcitrris Swingle (1915) Swinglea Merrill (1927) Eremocitrus Swingle (1914) Balsamocitrus Stapf (1906) Poncirus Raf* (1858) Afraegle (Sling.) Engl* (1915) Citrus L* (1753) Aeglopsis Smngle (1913.) Fortunella Smngle (1915) Feroniella Swingle (1912) Citropsis Swing* et M* Kell. (1914) Feronia Correa (1800) Aegle Correa (1798) The genera Thoreldora, Tetracronia, Lam.ofru.tex, Murraya, and Afraegle are omitted by Tanaka (1930). He considers Thoreldora and and Tetracronia to be species of Glycosmis, Lamiofrutex a species of

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The Floral Morphology of the Polemoniaceae

Cited by 16 publications

References 13 publications

Phylogeny of Polemoniaceae Based on Nuclear Ribosomal Internal Transcribed Spacer DNA Sequences

Phylogeny of Polemoniaceae Based on Nuclear Ribosomal Internal Transcribed Spacer DNA Sequences

The distribution and the systematic relevance of the androecial characters oligomery and polymery in the Magnoliophytina

The Floral Anatomy of the Aurantioideae

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