Morphological Studies of the Nymphaeaceae (Sensu Lato). XIII. Contributions to the Vegetative and Floral Structure of Cabomba

Moseley, Maynard F.; Mehta, Indira J.; Williamson, Paula S.; Kosakai, Hatsume

doi:10.2307/2443661

Cited by 24 publications

(34 citation statements)

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“…According to Richardson (1969), after formation of these lateral organs, the main apex sometimes produces a few abortive organs and then ceases its activity. Richardson's (1969) interpretation of Brasenia was accepted by Moseley et al (1984) and Schneider et al (2003) and is close to Moseley et al's (1984) interpretation of the distal part of the floating shoots of Cabomba. Important features of this interpretation are (1) sympodial growth, (2) extra-axillary flowers, and (3) extraaxillary lateral shoots.…”

Section: Comparison With Extant Cabombaceaesupporting

confidence: 67%

“…Morphological interpretations of their ramification pattern differ (Raciborski 1894b ;Chassat 1962;Richardson 1969;Moseley et al 1984), so it is premature to make any detailed comparison with Hydatellaceae. An obvious difference of Cabombaceae is the presence of elongated internodes between leaves in runners and floating shoots.…”

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

“…A lateral shoot with clockwise spiral of phyllotaxy (a-d9) is present in the axil of leaf 6. 879 SOKOLOFF ET AL.-SHOOT ARCHITECTURE AND BRANCHING PATTERN IN HYDATELLACEAE cording to Moseley et al (1984), most species of Cabomba have floating shoots with phyllotaxy that is proximally decussate and distally spiral. Axillary flowers are present in the decussate zone and in the lower portion of the spiral zone.…”

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

“…Along the upper part of the floating shoot, flowers are displaced from the leaf axils to varying degrees, so that a flower and its leaf are attached to the axis on different radii but at the same level (lateral to each other). When this arrangement occurs in an extreme form, the flower, leaf, and stem beyond a node assume a trigonal pattern (Moseley et al 1984). In some cases, a node with a leaf and a flower also possesses an aborted shoot apex, which Moseley et al (1984) interpreted as the apex of the main shoot.…”

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

“…When this arrangement occurs in an extreme form, the flower, leaf, and stem beyond a node assume a trigonal pattern (Moseley et al 1984). In some cases, a node with a leaf and a flower also possesses an aborted shoot apex, which Moseley et al (1984) interpreted as the apex of the main shoot. Thus, they described floating shoots as proximally monopodial with axillary flowers but distally sympodial with extra-axillary flowers.…”

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

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Shoot Architecture and Branching Pattern in Perennial Hydatellaceae (Nymphaeales)

Sokoloff

Remizowa

Briggs

et al. 2009

International Journal of Plant Sciences

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New data are presented on shoot architecture and branching pattern in one of the two perennial species of Hydatellaceae (Nymphaeales), Trithuria filamentosa, in the first detailed comparative study that covers both development and anatomy. Perennial rhizomes of T. filamentosa bear vegetative leaves and leafless stalks of reproductive units. Rhizome growth is sympodial. Each shoot produces four to nine vegetative leaves and in its distal part one or two lateral shoots and one to three reproductive units. Lateral shoots develop in the axils of vegetative leaves. The two first leaves of each lateral shoot lie in a transversal plane, with a divergence angle close to 180°; they are interpreted as prophylls. From the third leaf onward, divergence angles are close to the Fibonacci pattern. Stalks bearing reproductive units are interpreted as the uppermost lateral extra-axillary organs that continue the shoot phyllotaxic spiral; in this interpretation, the mode of insertion of reproductive units in T. filamentosa is similar to the mode of flower insertion in Nymphaea. An alternative but less plausible interpretation assumes presence of both lateral extra-axillary and terminal reproductive units.

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Section: Comparison With Extant Cabombaceaesupporting

confidence: 67%

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

Section: Comparison With Extant Cabombaceaementioning

confidence: 99%

See 3 more Smart Citations

Shoot Architecture and Branching Pattern in Perennial Hydatellaceae (Nymphaeales)

Sokoloff

Remizowa

Briggs

et al. 2009

International Journal of Plant Sciences

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Morphological Studies of the Nymphaeaceae Sensu Lato. Xvii. Floral Anatomy of Ondinea Purpurea Subspecies Purpurea (Nymphaeaceae)

Williamson

Moseley²

1989

American J of Botany

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Classification and phylogeny of the Nymphaeaceae are unresolved. This study provides floral anatomical data that will assist in elucidating generic interrelationships and systematic relationships to other taxa of angiosperms. The floral anatomy of Ondinea purpurea den Hartog subsp. purpurea has been examined utilizing light microscopy. The peduncle possesses stelar vascular bundle complexes and cortical vascular bundles. Cortical bundles terminate within the peduncle. Each bundle complex consists of 2 collateral bundles on the same radius, the inner bundle inverted; 2 protoxylary lacunae occur yet differ in structure and function. Progressing acropetally, the inner xylary lacunae become discrete mesarch strands surrounded centrifugally by a vascular cylinder formed by divisions and anastomosing of the bundle complexes. Together these become the massive receptacular vascular plexus. The plexus provides collateral traces to the floral organs. Each sepal receives 3 traces that separate from the plexus as 1–3 lateral traces. Petals are absent and no vestigial petal traces have been observed. Distally, the plexus forms several large strands of connate gynoecial and androecial traces termed the principal vascular bundles (PVBs). Ventral veins separate from the PVBs and the latter extend acropetally through the outer ovary wall. Branches of the ventrals and PVBs contribute to septal vascular reticula from which each ovule is supplied by one vascular bundle. Each stamen receives 1 trace from branches of the PVBs. The ventrals and PVBs terminate within the carpellary lobes. A comparative anatomical study is offered that supports the inclusion of Ondinea in the Nymphaeaceae sensu stricto.

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Differentiation of perianth organs in Nymphaeales

Warner

Rudall

Frohlich

2008

TAXON

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Perianth differentiation into distinct morphological whorls (sepals and petals) can be difficult to assess, particularly in early-divergent angiosperms. The perianth of members of Nymphaeales (Cabomba, Brasenia, Barclaya, Euryale, Nuphar, Nymphaea, Victoria, Ondinea) has been described as differentiated into sepals and petals, undifferentiated or presenting examples of both states. In this paper, we review perianth structure in Nymphaeales using morphology and ontogeny in order to determine whether their perianths are dimorphic.The results indicate that although there are differences between the outer and inner perianth series, the organs display few "typical" sepal-petal characteristics. Our observations of the perianth of Nuphar and Nymphaea, and reports on Euryale, show that sepaloid (green) and petaloid (yellow) areas can both occur on individual perianth organs, and that sepaloid areas occur mostly in the regions of the perianth organ that were exposed when the flower was in bud. SEM study revealed further morphological differences between the sepaloid and petaloid areas of Nuphar and Nymphaea and also between the exposed and covered regions of the perianth of Cabomba, Brasenia and Barclaya. We discuss the implications of these results with respect to current concepts of perianth differentiation.

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Morphological Studies of the Nymphaeaceae (Sensu Lato). XIII. Contributions to the Vegetative and Floral Structure of Cabomba

Cited by 24 publications

References 0 publications

Shoot Architecture and Branching Pattern in Perennial Hydatellaceae (Nymphaeales)

Shoot Architecture and Branching Pattern in Perennial Hydatellaceae (Nymphaeales)

Morphological Studies of the Nymphaeaceae Sensu Lato. Xvii. Floral Anatomy of Ondinea Purpurea Subspecies Purpurea (Nymphaeaceae)

Differentiation of perianth organs in Nymphaeales

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