An updated angiosperm classification

Dahlgren, Gertrud

doi:10.1111/j.1095-8339.1989.tb01717.x

Cited by 110 publications

(41 citation statements)

References 6 publications

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“…Dahlgren accepted Huber's arrangement of Asparagales throughout his classifications (Dahlgren 1975(Dahlgren , 1980G. Dahlgren 1989), although some of Huber's families were eventually transferred to other orders.…”

Section: Cyclic Evolution Of Fruit Types In Asparagales?mentioning

confidence: 99%

Fleshy Fruits in Liliflorous Monocots

Rasmussen¹,

Frederikson²,

Johansen³

et al. 2006

aliso

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Fleshy fruits occur in several monocot orders and families, and it is generally assumed that they have been derived from capsular fruits many times during the evolution of monocot lineages. Huber hypothesized in 1969 that most capsules in Asparagales are derived secondarily from berries and that this transformation was correlated with the evolution of phytomelan-coated seeds, a pivotal character in his circumscription of Asparagales as part of reclassifying Liliaceae s.l. Dahlgren and co-workers suggested several parallel derivations and "reversals" in this character, e.g., the transformation sequence trifollicular fruits __... capsules __... berries __... capsules __... berries. Mapping of fleshy fruits on a phylogeny based on molecular characters indicates that Asparagales do not have fleshy fruits as a basal character. Dahlgren's "cyclic character evolution" hypothesis is not supported by the distribution of dry and fleshy fruits, and there is no obvious correlation between baccate fruits and phytomelaniferous seeds in Asparagales. Phytomelaniferous seeds are not an evident synapomorphy of Asparagales as presently circumscribed. The anatomy and development of different capsular and baccate fruits in selected genera are studied in an ongoing project to reveal homologies and establish an adequate fruit typology. Some observations of texture and dehiscence structures in dry and fleshy capsules and in typical berries from hypogynous and epigynous flowers are reported in this paper.

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Section: Cyclic Evolution Of Fruit Types In Asparagales?mentioning

confidence: 99%

Fleshy Fruits in Liliflorous Monocots

Rasmussen¹,

Frederikson²,

Johansen³

et al. 2006

aliso

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“…The circumscription of Sapindaceae has been debated ever since. Takhtajan (1987), Cronquist (1988) and Dahlgren (1989) maintained Aceraceae and Hippocastanaceae separate from Sapindaceae, whereas broader concepts of the family have been adopted by several workers (e.g., Umadevi and Daniel, 1991;Judd et al, 1994;Gadek et al, 1996;Savolainen et al, 2000;Thorne, 2000Thorne, , 2007APGII, 2003).…”

Section: Introductionmentioning

confidence: 99%

Plastid and nuclear DNA markers reveal intricate relationships at subfamilial and tribal levels in the soapberry family (Sapindaceae)

Buerki

Forest

Acevedo‐Rodríguez

et al. 2009

Molecular Phylogenetics and Evolution

138

271

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a b s t r a c tThe economically important soapberry family (Sapindaceae) comprises about 1900 species mainly found in the tropical regions of the world, with only a few genera being restricted to temperate areas. The infrafamilial classification of the Sapindaceae and its relationships to the closely related Aceraceae and Hippocastanaceae -which have now been included in an expanded definition of Sapindaceae (i.e., subfamily Hippocastanoideae) -have been debated for decades. Here we present a phylogenetic analysis of Sapindaceae based on eight DNA sequence regions from the plastid and nuclear genomes and including 85 of the 141 genera defined within the family. Our study comprises 997 new sequences of Sapindaceae from 152 specimens. Despite presenting 18.6% of missing data our complete data set produced a topology fully congruent with the one obtained from a subset without missing data, but including fewer markers. The use of additional information therefore led to a consistent result in the relative position of clades and allowed the definition of a new phylogenetic hypothesis. Our results confirm a high level of paraphyly and polyphyly at the subfamilial and tribal levels and even contest the monophyletic status of several genera. Our study confirms that the Chinese monotypic genus Xanthoceras is sister to the rest of the family, in which subfamily Hippocastanoideae is sister to a clade comprising subfamilies Dodonaeoideae and Sapindoideae. On the basis of the strong support demonstrated in Sapindoideae, Dodonaeoideae and Hippocastanoideae as well as in 14 subclades, we propose and discuss informal groupings as basis for a new classification of Sapindaceae.

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“…For many genera, several species and cultivars were observed; for brevity, where senescence symptoms were identical, only one representative is included in Table 1. The classification system of Dahlgren et al (1985) and Dahlgren (1989) is followed. The term.…”

Section: Methodsmentioning

confidence: 99%