Systematic Foliar Morphology of Phyllanthoideae (Euphorbiaceae). III. Cladistic Analysis

Levin, Geoffrey A.

doi:10.2307/2419031

Cited by 24 publications

(22 citation statements)

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“…Euphorb. : 6 (2001 Levin (1986b) suggested a close relationship between Heywoodia and Astrocasia, which is confirmed by the molecular evidence. considered Heywoodia as an ancient relict genus because he interpreted traits such as dioecy, the poorly differentiated perianth, the variability of stamen and carpel number, and the small embryo as plesiomorphic.…”

Section: Heywoodia Simsupporting

confidence: 53%

“…This genus was placed with Drypetes and later with genera like Meineckia, but in the molecular analyses of Kathriarachchi et al (2005Kathriarachchi et al ( , 2006 it has been recovered among the basal genera of Phyllantheae. This placement is also compatible with pollen morphology (K€ ohler 1965), leaf morphology (Levin 1986b), and seed coat structure (Tokuoka and Tobe 2001 4: 190 (1975 (Levin 1986a) and pollen morphology (various studies), and the molecular results (Kathriarachchi et al 2005: 127) confirm the close relationship between them but fail to prove that the one is nested in the other.…”

Section: Chorisandrachne Airy Shawmentioning

confidence: 68%

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Euphorbiaceae

Webster¹

2013

Flowering Plants. Eudicots

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Section: Heywoodia Simsupporting

confidence: 53%

Section: Chorisandrachne Airy Shawmentioning

confidence: 68%

Euphorbiaceae

Webster¹

2013

Flowering Plants. Eudicots

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“…Consequently, such venation characteristics are not diagnostic at either the sectional or specific level in Vaccinium. Our observations corroborate the results of other studies which also found that overall qualitative venation pattern is often diagnostic only at the generic level or above, but rarely diagnostic at subgeneric levels (Dickison 1975;Hickey and Wolfe 1975;Levin 1986;Saibaba and Rao 1990;Sarma et al 1992).…”

Section: Discussionsupporting

confidence: 92%

“…However, a similar taximetric analysis based on character means for each taxon, which the authors argued "smoothed out" environmental and developmental variation in the individuals, produced a dendrogram which agreed with the accepted classification of the genus. In a cladistic analysis of the Phyllanthoideae Levin (1986) verified the systematic value of vegetative characters and concluded that the phylogenies based on cladistic analysis of only foliar characters were consistent with classifications based on traditional taxonomic information. Although vegetative anatomy does provide useful taxonomic information (Levin 1986;Ode11 and Vander Kloet 1991), vegetative characteristics are considered to be secondary taxonomic characters and consequently may be underutilized in taxonomic investigations.…”

Section: Introductionmentioning

confidence: 81%

“…In a cladistic analysis of the Phyllanthoideae Levin (1986) verified the systematic value of vegetative characters and concluded that the phylogenies based on cladistic analysis of only foliar characters were consistent with classifications based on traditional taxonomic information. Although vegetative anatomy does provide useful taxonomic information (Levin 1986;Ode11 and Vander Kloet 1991), vegetative characteristics are considered to be secondary taxonomic characters and consequently may be underutilized in taxonomic investigations. The varied results obtained in taxonomic and systematic studies based on vegetative characters suggest that the utility of these characters for classification and phylogeny reconstruction may vary from character to character and (or) group to group.…”

Section: Introductionmentioning

confidence: 81%

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Foliar venation characteristics of Vaccinium sect. Macropelma and sect. Myrtillus (Ericaceae): a comparative analysis

Powell¹,

Kloet²

1997

Can. J. Bot.

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A suite of eight foliar venation characteristics from two closely related sections of Vaccini~ttn L., sect. Macropeltna Klotzsch and sect. Myrtill~ts Dumortier, were analyzed to assess the level of similarity between these sister sections, address the questionable classification of Vaccitliutt~ cereutn (L.0 Forster, and assess the diagnostic ability of venation characteristics. Our analysis revealed no significant differences in foliar venation characteristics between V. cereurn and the Hawaiian species from sect. Macropeltna. In addition, all the leaves of V. cereutn examined contained the attenuated extended bundle sheath system as found in other representatives from sect. Macropelttla. Taximetric analysis showed that these quantitative foliar venation characters were diagnostic at the sectional level but not at the species level. A cluster analysis of 108 operational taxonomic units did separate the two sections but did not discriminate among the 12 individual species. However, a similar taximetric analysis using the character means for each species (for the eight foliar characters), which "smoothed out" the variation due to environmental plasticity, produced a dendrogram which closely resembled the currently accepted Vacciniutn classification. Although further investigations into the constancy and reliability of foliar venation characters in the remaining sections of Vacciniutn are desirable, our results clearly show that these quantitative vegetative foliar characters do have diagnostic value and can be utilized in taximetric analyses. R6sum6 : Les buts du travail ttait d'evaluer le degrC de similaritt entre les sections soeurs du genre Vacciniutn L, sect. Macropeltna Klotzsch et sect. Myrtill~ts Dumortier, d'examiner la classification douteuse du Vacciniutn cereutn (L.0 Forster, et d'evaluer la capacitC diagnostique des caracteristiques des nervures. A cette fin, les auteurs ont analysk une suite de huit caracteristiques des nervures foliaires de ces deux sections voisines, du genre Vaccitzi~tnz. L'analysc rCvkle qu'il n'y a pas de diffkrence significative dans les caracteristiques des nervures foliaires entre le V. cereutn et les espkces hawai'ennes de la sect. Macropeltna. De plus, toutes les feuilles du V. cererltn examinees conticnnent le systknie extensif d'enveloppe attCnuCe des faisceaux qu'on retrouve chez d'autres representants de la sect. Macropelma.L'analyse taximetrique niontre que ces caractCristiques quantitatives de la nervation foliaire ont une valeur diagnostique B tous les niveaux des sections, mais non pas au niveau de l'espkce. Une analyse de regroupement effectuee sur 108 unites taxonomiques opCrationnelles permet de separer les deux sections mais ne distingue pas les 12 espkces individuelles. Cependant, une analyse taximetrique siniilaire effectuee en utilisant la moyenne des caractkres pour chaque espkce (incluant les huit caracteristiques foliaires), qui attCnue la variation due B la plasticit6 environnementale, produit un dendrogramme qui ressemble ttroitement B la classification co...

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Class Magnoliopsida (Dicotyledons)

2009

Flowering Plants

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Systematic Foliar Morphology of Phyllanthoideae (Euphorbiaceae). III. Cladistic Analysis

Cited by 24 publications

References 0 publications

Euphorbiaceae

Euphorbiaceae

Foliar venation characteristics of Vaccinium sect. Macropelma and sect. Myrtillus (Ericaceae): a comparative analysis

Class Magnoliopsida (Dicotyledons)

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