The Comparative Morphology and Relationships of the Magnoliaceae. I. Trends of Specialization in the Stamens

Canright, James E.

doi:10.2307/2438333

Cited by 37 publications

(21 citation statements)

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“…It is interesting in this respect that ZIMMERMANN (1965: 132-135), defending the telome-theory, already argued that the primitive Angiosperm stamen should have a non-flattened but otherwise rather "typical" structure. Contrasting the opinion of CANRIGHT (1952) about the flat Degeneriaceae-or Magnoliaceae-like stamens as the basic type in Angiosperms with the findings of HEINSBROEK & VAN HEEL (1969), KUBITZKI (1972: 263) regards the evolutionary pathways of stamens in Angiosperms as an unsolvable problem. Relying on the data given by Baum and Leinfellner and at the same time considering the functional aspects, we do not think so.…”

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confidence: 83%

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The Structure and Function of the Primitive Angiosperm Flower - A Discussion*

Gottsberger

1974

Acta Botanica Neerlandica

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confidence: 83%

“…CANRIGHT (1952) adopts the opposite view and interprets the massive, laminar stamens as the most primitive.…”

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confidence: 99%

The Structure and Function of the Primitive Angiosperm Flower - A Discussion*

Gottsberger

1974

Acta Botanica Neerlandica

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“…8) and floral axes .. After clearing, the vascularization of relatively glabrous carpels was accentuated by the use of a basic fuchsin stain, as descrihed in an earlier paper (Canright, 1952). This is due to the facts that 2 concentric vascular systems occur, a stelar system and a cortical system, and that both of these systems normally contribute to the vascular.…”

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confidence: 91%

“…The primitive stamens of Degeneria and their close relationship to the basic types of the Magnoliaceae have previously been discussed (Canright, 1952). The basis for this statement is seen in their further prediction that these organs would be likely to prove quite significant in future discussions of the floral morphology of the angiosperms.…”

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confidence: 91%

The Comparative Morphology and Relationships of the Magnoliaceae. Iii. Carpels

Canright

1960

American J of Botany

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Canright, James E. (Indiana U., Bloomington.) The comparative morphology and relationships of the Magnoliaceae. III. Carpels. Amer. Jour. Bot. 47(2): 145—155. Illus. 1960.–The morphology and vascular anatomy of the carpels of 49 species in 9 of the 10 genera of the Magnoliaceae are described. Assuming that the conduplicate carpel of Australasian species of Drimys (Winteraceae) represents the primitive condition, various carpellary modifications are indicated for the Magnoliaceae. These evolutionary spcializations from the basic type include: basal adnation, lateral concrescence, reduction in number of ovules, closure of the ventral suture, and localization of stigmatic areas. Among the examined species it was determined that carpels of the genera Elmerrillia and Manglietia retain the most primitive features, whereas those of the genus Liriodendron possess the most advanced. Comparisons are made with the gynoecia of related ranalean families, viz., Himantandraceae, Degeneriaceae and Annonaceae.

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“…They have both the ancestral features and those depicting specialization, therefore they lately became intensively studied. Morphological and anatomical studies gave the evidence for ancestral character and early rise of this group taking into account the number of original features such as undifferentiated perianth, numerous spirally arranged generative parts, construction of the pollen and presence of the oil cells [2][3][4][5].…”

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confidence: 99%

The progressive and ancestral traits of the secondary xylem within Magnolia clad – the early diverging lineage of flowering plants

Wróblewska

2015

Acta Soc Bot Pol

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The qualitative and quantitative studies, presented in this article, on wood anatomy of various species belonging to ancient Magnolia genus reveal new aspects of phylogenetic relationships between the species and show evolutionary trends, known to increase fitness of conductive tissues in angiosperms. They also provide new examples of phenotypic plasticity in plants.The type of perforation plate in vessel members is one of the most relevant features for taxonomic studies. In Magnolia, until now, two types of perforation plates have been reported: the conservative, scalariform and the specialized, simple one.In this paper, are presented some findings, new to magnolia wood science, like exclusively simple perforation plates in some species or mixed perforation plates -simple and scalariform in one vessel member. Intravascular pitting is another taxonomically important trait of vascular tissue. Interesting transient states between different patterns of pitting in one cell only have been found. This proves great flexibility of mechanisms, which elaborate cell wall structure in maturing tracheary element. The comparison of this data with phylogenetic trees, based on the fossil records and plastid gene expression, clearly shows that there is a link between the type of perforation plate and the degree of evolutionary specialization within Magnolia genus.

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The Comparative Morphology and Relationships of the Magnoliaceae. I. Trends of Specialization in the Stamens

Cited by 37 publications

References 21 publications

The Structure and Function of the Primitive Angiosperm Flower - A Discussion*

The Structure and Function of the Primitive Angiosperm Flower - A Discussion*

The Comparative Morphology and Relationships of the Magnoliaceae. Iii. Carpels

The progressive and ancestral traits of the secondary xylem within Magnolia clad – the early diverging lineage of flowering plants

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