Theligonum cynocrambe: Developmental morphology of a peculiar rubiaceous herb

  title={Theligonum cynocrambe: Developmental morphology of a peculiar rubiaceous herb},
  author={Rolf Rutishauser and Louis P. Ronse Decraene and Erik Smets and Ilse Mendoza-Heuer},
  journal={Plant Systematics and Evolution},
The annual Mediterranean herbTheligonum cynocrambe shows a peculiar combination of morphological characters, e.g., switch from decussate to spiral phyllotaxis with 90–100° divergence, combined with a change from interpetiolar to lateral stipules, anemophily, lack of calyx, flowers often dimerous to trimerous, corolla fused in both male and female flowers, male flowers extra-axillary, with 2–19 stamens per flower, female flowers axillary, with inferior uniovulate ovary, basilateral style and… 

Floral ontogeny of the Afro-Madagascan genus Mitrasacmopsis with comments on the development of superior ovaries in Rubiaceae.

A floral ontogenetic study of Mitrasacmopsis showed that the presence of a prominent beak in the fruiting stage gives the whole ovary a semi-inferior appearance, which is different from the secondarily superior ovary observed in Gaertnera.

Developmental morphology of branching flowers in Nymphaea prolifera

The developmental morphology of the branching flowers of N. prolifera is described using both microtome sections and scanning electron microscopy and it is shown that this species usually produces sterile tuberiferous flowers that act as vegetative propagules.

Different ways to obtain similar results: the development of the corolla and epipetaly in Rubieae (Rubioideae, Rubiaceae)

The results suggest that, in all species studied, the mature phenotype of the corolla as well as the epipetaly of the stamens is caused by a combination of three developmental processes, and the relative moment of activation of each of these processes during floral development (plastochron variation or heterochrony).

The Significance of Gynoecium and Fruit and Seed Characters for the Classification of the Rubiaceae

  • 2012
This paper attempts to give a survey of the highly diverse situation found in the gynoecium (especially ovary) of the Rubiaceae (multi-, pluri-, pauciand uniovulate locules; reduction of ovules and

Floral ontogeny links Dialypetalanthus (Condamineeae) with the floral developmental morphology of other Rubiaceae

Flowers in Dialypetalanthus develop a stamen-corolla-calyx tube, which can be considered as a floral morphological link between the genus and the other Rubiaceae.

Elaborate petals in Australian Spermacoce (Rubiaceae) species: morphology, ontogeny and function.

The former hypothesis that the two types of elaborate petals in Spermacoce are essentially homologous is here rejected and field investigations point out that the elaboratePetals might play a role in the pollination biology of the species.

Desenvolvimento do rudimento seminal em Borreria verticillata (L.) G. Mey. (Rubiaceae - Rubioideae - Spermacoceae)

The remnant cells from the external integument, the inclusion of the nucellus in the chalaza, the occurrence of few elongated cells in thenucellar epidermis and the increased number of archesporial cells classify the ovule formation of B. verticillata in the Mitracarpus type.

Gynoecial Structure of Vitales and Implications for the Evolution of Placentation in the Rosids

The results underscore the labile nature of placentation despite its long use as a character of taxonomic significance and provide a basis for inferring the directionality ofPlacentation evolution in the context of a wider investigation of rosid relationships.

Ovule ontogeny of Relbunium species in the evolutionary context of Rubiaceae

Carpel and ovule ontogeny, gynosporogenesis and gynogametogenesis in species of Relbunium were studied in order to provide additional data distinguishing evolutionary embryological characters. No

Early flower and inflorescence development in Dioscorea tokoro (Dioscoreales): shoot chirality, handedness of cincinni and common tepal-stamen primordia

The data support the view that presence/absence of common primordia is homoplastic in lilioid monocots and correlates with timing of receptacle expansion.



The character states of the Caribbean monotypic endemic Strumpfia (Rubiaceae)

Because of a) many unusual and, in part, unique features and b) the lack of detailed comparative data for neotropical Rubiaceae, the genus' subfamilial and tribal position remains obscure.

Ovary, seed and fruit ofRutidea (Rubiaceae, Pavetteae)

  • P. Block
  • Biology
    Plant Systematics and Evolution
  • 2004
Comparisons with other Rubiaceae (especially Pavetteae), show that hemianatropy and campylotropy occur more often in theRubiaceae than hitherto accepted and corroborates the close affinity between Rutidea andNichallea.

The genera Mitchella and Damnacanthus. Evidence for their close alliance; comments on the campylotropy in the Rubiaceae and the circumscription of the Morindeae

The investigated characters overwhelmingly support the close alliance between Mitchella and Damnacanthus, and the Morindeae appear to be a heterogeneous tribe, and at least a group of genera allied to Prismatomeris is probably to be removed.

The Phyllotaxy of Costus (Costaceae)

A morphological and developmental study of three species of Costus revealed a number of facts about this unusual phyllotactic pattern, including that in all three species, the cataphylls and foliage leaves have tubular sheaths, while the inflorescence bracts are nonsheathing and spiromonostichy is only loosely correlated with closed leaf sheaths.

The delimitation of the tribe Anthospermeae and its affinities to the Paederieae (Rubiaceae)

A critical comparison of many characters suggests that the Rubiaceae tribe Anthospermeae is closely allied to the tribe Paederieae, and the genus Neogaillonia Linchevskii belongs to this tribe.

The distribution and systematic relevance of the androecial character polymery

Polymery is consistent with other floral characters, such as the nature of perianth, vasculature (axial and cortical systems) and merosity, and must be regarded as gradual variations of each character state.

Phylogeny ofRubiaceae-Rubieae inferred from the sequence of a cpDNA intergene region

A phylogenetic analysis of 25 species, representing eight genera of theRubieae tribe (Rubiaceae), has been made using the DNA sequence of the chloroplastatp B-rbc L intergene region, finding five groups are clearly separated and described as informal clades.

An Updated Phylogenetic Classification of the Flowering Plants

This update of the classification of the flowering plants, or Angiospermae, is based upon about 800 pertinent books, monographs, and other botanical papers published since my last synopsis appeared in the Nordic Journal of Science in 1983, and attempts to indicate relationships among the superorders, orders, and suborders.


The non-Loganiaceae taxa Cinchona (Rubiaceae), Nerium (Apocynaceae), and Exacum (Gentianaceae) were all found to have their closest relatives within the Loganiaceae indicating that the loganiaceae are paraphyletic and ought to be reclassified.