Pollen morphological survey of Pentas (Rubiaceae-Rubioideae) and its closest allies.

  title={Pollen morphological survey of Pentas (Rubiaceae-Rubioideae) and its closest allies.},
  author={Dessein and Scheltens and Huysmans and Robbrecht and Smets},
  journal={Review of palaeobotany and palynology},
  volume={112 4},
  • Dessein, Scheltens, +2 authors Smets
  • Published 1 November 2000
  • Biology, Medicine
  • Review of palaeobotany and palynology
Pollen descriptions, based on LM and SEM observations, are provided for the Pentas complex, an African alliance within the Hedyotideae-Spermacoceae alliance, which includes the genera Pentas, Otomeria, Batopedina, Parapentas, and Chamaepentas. The close relationship among these genera is confirmed by pollen morphological data. The observed variation in pollen character states agrees well with the existing genera and subgenera. The combination of small spheroidal pollen grains with narrow, acute… 
Pollen morphology of NW European representatives confirms monophyly of Rubieae (Rubiaceae)
The predictive value of pollen morphology is extremely high at the tribal level and supports the monophyly of Rubieae, the second rubiaceous tribe entirely without orbicules.
Palynological characters and their systematic significance in Naucleeae (Cinchonoideae, Rubiaceae)
Pollen morphology is of little value in distinguishing the subtribes and genera of the Naucleeae, but Ancestral state reconstruction using MacClade is unambiguous in showing that the possession of an H-shaped endoaperture and protruding onci form morphological synapomorphies of the clade Hymenodictyon+ NaucleEae.
The systematics of Knoxieae (Rubiaceae)—molecular data and their taxonomic consequences
A molecular phylogeny of the Knoxieae group is presented and the morphological support for the resulting groups and the taxonomic consequences of the phylogeny are discussed.
Pollen of African Spermacoce species (Rubiaceae) Morphology and evolutionary aspects
Pollen morphology of 43 African species of the genus Spermacoce has been investigated by scanning electron and light microscopy, and nine pollen types are recognized mainly on the basis of pollen size, aperture morphology and tectum peculiarities.
Gomphocalyx and Phylohydrax (Rubiaceae): sister taxa excluded from Spermacoceae s.s., featuring a remarkable case of convergent evolution
The genera Gomphocalyx and Phylohydrax (Rubiaceae) have been invariably placed in the tribe Spermacoceae s.s. based on the uni-ovulate ovary locules and pluri-aperturate pollen grains. Sequence data
A palynological study of Galium L. (Rubiaceae) in Egypt and its systematic implication
Pollen shape, size, exine ornamentation, number of apertures present powerful characters for distinguishing between species, and the ornamentation was found useful to distinguish among closely related species such as Galium aparine and G. spurium.
Palynological characters and their phylogenetic signal in Rubiaceae
The systematic usefulness of pollen morphology in Rubiaceae is discussed at the (sub)family, tribal, generic, and infraspecific levels, using up-to-date evolutionary hypotheses for the different lineages in the family.
Pollen morphology of Rubiaceae Juss. species occurring in an area of caatinga (dryland) vegetation in Bahia State, Brazil
The palynology of the following 16 species of Rubiaceae, from Brejinho das Amestistas, was investigated and palynological data can be used to distinguish these species.
Phylogeny of the Herbaceous Tribe Spermacoceae (Rubiaceae) Based on Plastid DNA Data1
This study is the first to address phylogenetic relationships within Spermacoceae from a tribal perspective and provides a phylogenetic hypothesis with broad sampling across the major lineages of Spermcoceae that can be used to guide future species-level and generic studies.
Systematics, taxonomy and floristics of Brazilian Rubiaceae: an overview about the current status and future challenges
The present work is to offer an overall view of the most recent family classification with emphasis on the genera of Rubiaceae occurring in Brazil, and to indicate particular taxa that are still in need of phylogenetic and taxonomic studies.


A collapsed tribe revisited: pollen morphology of the Isertieae (Cinchonoideae–Rubiaceae)
The tribes Mussaendeae and Isertieae (relatively large pollen, endexine reduced to granular `islands', endocolpi with thickened lateral margins) in their new circumscription are supported palynologically.
Notes on Tropical African Rubiaceae: III
The genus Tapinopentas was published by Bremekamp in 1952 and he carefully compared it with Chamaepentas, Parapentas and Pentas, but not with Otomeria, although it seems to me to take an intermediate
  • B. Bremer
  • Medicine, Biology
    Cladistics : the international journal of the Willi Hennig Society
  • 1987
Abstract— The sister group of the monophyletic tribe Argostemmateae, including Argostemma and Neurocalyx, is not the tribe Hedyotideae, or a part of it, as earlier assumed, but the monophyletic tribe
The biology of heterostyly
Abstract Heterostyly is a genetically controlled floral polymorphism that is known to occur in 24 families of flowering plants. The floral morphs differ reciprocally in stamen and style lengths. They
Remarks on the position, the delimitation and the subdivision of the Rubiaceae
Some of the characters by the aid of which in the Rubiaceae very suitable keys to the genera have been constructed, but which when they were used for the elaboration of a classification, led to entirely unsatisfactory results are discussed.
Studies in tropical African Rubiaceae (7-12)
Keywords. - Tricalysia bridsoniana sp. nov. (var bridsoniana, Kenya; var. pandensis var. nov., Tanzania); Batopedina pulvinellata subsp. glabrifolia subsp. nov. (Zaire); Tricalysia ovalifolia
Prodromus systematis naturalis regni vegetabilis
Prodromus systematis naturalis regni vegetabilis , Prodromus systematis naturalis regni vegetabilis , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی