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Grant, Jason

Nom
Grant, Jason
Affiliation principale
Fonction
Professeur.e ordinaire
Email
jason.grant@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/30709
_
0000-0002-1197-1131

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  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS : IV: ELEVEN NEW SPECIES OF MACROCARPAEA (GENTIANACEAE: HELIEAE) FROM CENTRAL AND SOUTH AMERICA, AND THE FIRST REPORT OF THE PRESENCE OF STIPULES IN THE FAMILY
    Grant, Jason 
    ;
    Weaver, Richard E. Jr
    Progress toward a taxonomic revision of Macrocarpaea (Gentianaceae: Helieae) has revealed numerous novelties in this morphologically diverse and unexpectedly species-rich genus. Eleven new species are here described and illustrated from Central and South America: Colombia (M. nicotianifolia and M. schultesii), Costa Rica (M. auriculata), Ecuador (M. subsessilis), Peru (M. gracilis, M. maguirei, M. wurdackii, and M. zophoflora), and Venezuela (M. ewaniana, M. papillosa, and M. weaveri). Macrocarpaea zophoflora is notable for being the first species to be described of Gentianaceae that is known, or recognized, to have free deciduous interpetiolar stipules. The family was previously defined as exstipulate without exception.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS III: SIX NEW SPECIES OF MOON-GENTIANS (MACROCARPAEA, GENTIANACEAE: HELIEAE) FROM PARQUE NACIONAL PODOCARPUS, ECUADOR
    Grant, Jason 
    ;
    Struwe, Lena
    In preparation for the Flora Neotropica monograph of Macrocarpaea (Gentianaceae: Helieae) and recent fieldwork in Ecuador, six new species have been identified and are here described from Parque Nacional Podocarpus and its surrounding areas in Loja and Zamora-Chinchipe provinces. These are Macrocarpaea apparata, M. bubops, M. jensii, M. lenae, M. luna-gentiana, and M. noctiluca. For each new species, descriptions, illustrations, and ecological information are provided. The neotropical montane genus Macrocarpaea has among the highest biodiversity in Ecuador with over 30 species present. The name “moon-gentian” or “genciana de luna” is coined as the common name for the genus Macrocarpaea.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS I: AN INTRODUCTION TO THE GENUS MACROCARPAEA AND THREE NEW SPECIES FROM COLOMBIA, ECUADOR, AND GUYANA
    Grant, Jason 
    ;
    Struwe, Lena
    A monographic revision of the neotropical genus Macrocarpaea (Gentianaceae: Helieae) has been initiated. The taxonomic and nomenclatural background is provided as an introduction in this first of several papers. These gentians are typically montane shrubs with large, funnelform, night-blooming, bat-pollinated flowers and have a high rate of species endemicity. It is also an excellent group from which to study neotropical montane biogeography, since they occur in all major neotropical montane habitats. Three new species are described and illustrated: Macrocarpaea angelliae (Ecuador) in discussion with M. stenophylla where a neotype is selected, M. ayangannae (Guyana), and M. luteynii (Colombia). New synonymy is reported for one published species [Macrocarpaea guttifera = Ravenia biramosa (Rutaceae)] and six “nomen herbariorum”: “Axelsonia globiflora Dusén, ined.” = M. rubra, “M. buchtienii Gilg, ined.” = M. cinchoniifolia, “M. ekmanii Ewan, ined.” = M. pinetorum, “M. gilgiana Rusby, ined.” = M. cochabambensis, “M. peduncularis Rusby, ined.” = M. bangiana, and “M. tabacifolia Ewan, ined.” = M. cinchoniifolia.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS V: TWENTY-THREE NEW SPECIES LARGELY FROM PERU, AND TYPIFICATION OF ALL SPECIES IN THE GENUS
    Grant, Jason 
    In preparation for a monograph of Macrocarpaea (Gentianaceae: Helieae), 23 new species are here described and illustrated: 1 from Colombia (M. biremis), 3 from Ecuador (M. elix, M. gattaca, and M. pringleana), and 19 from Peru (M. canoëfolia, M. dillonii, M. ericii, M. fortisiana, M. innarrabilis, M. jalca, M. kayakifolia, M. kuelap, M. kuepferiana, M. luya, M. normae, M. obnubilata, M. ostentans, M. pajonalis, M. robin-fosteri, M. tabula-fluctivagifolia, M. tahuantinsuyuana, M. wallnoeferi, and M. weigendiorum). A list of all names originally described in, or transferred to, Macrocarpaea as of year 2002 is presented. Lectotypes are selected for 12 taxa as follows: Lisianthus obtusifolius var. constrictus Griseb., Macrocarpaea bangiana Gilg, M. bogotana Gilg, M. calophylla Gilg, M. chlorantha Gilg, M. cochabambensis Gilg-Ben., M. glaziovii Gilg, M. hartii Krug & Urb., M. micrantha Gilg, M. pachyphylla Gilg, M. polyantha Gilg, and M. rubra Malme. A neotype is selected for M. duquei Gilg-Ben., and M. weberbaueri Gilg is excluded from use.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS X: A SYNOPSIS OF THE GENUS IN MONTANE ATLANTIC FORESTS OF BRAZIL
    Grant, Jason 
    ;
    Trunz, Vincent
    Outside of the principal distribution and major diversification of Macrocarpaea in the Andes, smaller groups of species are found in the Greater Antilles of the Caribbean, Mesoamerica, the Guayana Highlands, and montane Atlantic forests of Brazil. Here, a complete revision of the genus in the latter region is presented recognizing eight species that correspond to the entirety of Macrocarpaea sect. Tabacifoliae: M atlantica J.R. Grant & V. Trunz, sp. nov., M. dolichophylla J.R. Grant & V. Trunz, sp. nov., M. glaziovii Gilg, M. illecebrosa J.R. Grant, M. inesiae J.R. Grant & V. Trunz, sp. nov., M. obtusifolia (Griseb.) Gilg, M. orbiculata J.R. Grant & V. Trunz, sp. nov., and M. rubra Malme. These species occur primarily in humid coastal montane rainforests (Mata Atlântica), and two species also occur in campos rupestre montane savannas.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS XI: FIVE NEW SPECIES FROM THE ANDES OF ECUADOR AND COLOMBIA
    Grant, Jason 
    Five new species are described from Andean regions of Colombia and Ecuador including M. catherineae, M. cortinae, M. illuminata, M. pacifica, and M. umbellata. Macrocarpaea stenophylla is reported as a range extension from Peru to Ecuador.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS IX: A SYNOPSIS OF THE GENUS IN BOLIVIA
    Grant, Jason 
    A synopsis of the genus Macrocarpaea in Bolivia is presented. Four species are recognized including M. bangiana Gilg, M. cinchonifolia (Gilg) Weaver, M. cochabambensis Gilg-Ben., and M. fuentesii J.R. Grant, sp. nov. These are the four southernmost species of Macrocarpaea in the Andes.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS VIII: FOUR NEW SPECIES FROM ECUADOR
    Grant, Jason 
    Two new species, Macrocarpaea claireae and M. quizhpei (Gentianaceae: Helieae), are described from the Huancabamba region of southern Ecuador. Macrocarpaea claireae occurs around Valladolid, adjacent to P. N. Podocarpus, and M. quizhpei occurs in the Nangaritza watershed. M. claireae is closely related to M. pringleana and M. sodiroana, yet differs notably in its glaucous-green, campanulate-urceolate calyx. Macrocarpaea quizhpei has affinities to M. dies-viridis, but differs in having a large, diffusely branched, open thyrse to 1.3 m high.
  • Publication
    Accès libre
    DE MACROCARPAEAE GRISEBACH (EX GENTIANACEIS) SPECIEBUS NOVIS XII: THREE NEW SPECIES FROM THE ANDES OF PERU
    Grant, Jason 
    ;
    Vieu, Julien 
    Three new species from Peru, Macrocarpaea abiseo, M. felicitata, and M. huamantanga, are described and illustrated.
  • Publication
    Accès libre
    Cytotaxonomic notes on the tribe Helieae (Gentianaceae)
    Trunz, Vincent
    ;
    Zeltner, Louis
    ;
    Küpfer, Philippe 
    ;
    Grant, Jason 
    A survey of all known chromosome counts of gentian tribe Helieae are presented including new reports for ten species. Amongst the novelties are four genera of the Gentianaceae that are reported for the first time, Calolisianthus and Helia (both Helieae), and Schultesia and Zygostigma (both Chironieae). In the Helieae, our results reinforce the hypothesis of Weaver 1969 that two ploidy series occur in the tribe, one polyploid based on n = 20 and one dysploid based on n = 21. The basal chromosome number for the Helieae remains to be determined.