Results 1 to 10 of about 14,828 (226)

Ploidy levels and reproductive behaviour in invasive Hieracium pilosella in Patagonia [PDF]

open access: yesNeoBiota, 2011
Within a population of invasive Hieracium pilosella in Chilean Patagonia we found two ploidy levels, pentaploid and hexaploid. Each ploidy level was represented by one clone.
František Krahulec, Anna Krahulcova
doaj   +2 more sources

Simulated fire and plant-soil feedback effects on mycorrhizal fungi and invasive plants [PDF]

open access: yesiScience
Summary: Climate change intensifies fires, raising questions about their impacts on plant invasions via changes in soil biota and plant-soil feedback (plants alter soil conditions, changing plant growth and vice-versa).
Kendall E. Morman   +5 more
doaj   +2 more sources

The collection-based inventory and spatial analysis of Hieracium s.str. (Asteraceae) in Finland [PDF]

open access: yesBiodiversity Data Journal
Due to the lack of complete taxonomic inventories and revisions for nearly 120 years and a high number of chaotic and conflicting species descriptions in the times of the primary biodiversity exploration, the actual diversity of apomictic species of ...
Alexander Sennikov
doaj   +4 more sources

Preliminary Review of the Diploid Taxa in Hieracium s.s. [PDF]

open access: yesPlants
A review of the known diploid species in Hieracium L. s.s. (Asteraceae, Cichorieae) is presented. This article aims to summarize the current knowledge of the taxa with the basic ploidy level in the genus (2n = 2x = 18), as these entities are supposed to ...
Giacomo Baldesi   +2 more
doaj   +2 more sources

A Multigene Phylogeny of Native American Hawkweeds (Hieracium Subgen. Chionoracium, Cichorieae, Asteraceae): Origin, Speciation Patterns, and Migration Routes [PDF]

open access: yesPlants, 2022
Native American hawkweeds are mainly mountainous species that are distributed all over the New World. They are severely understudied with respect to their origin, colonization of the vast distribution area, and species relationships.
Judith Fehrer   +6 more
doaj   +2 more sources

Aportaciones al conocimiento del género Hieracium L. en España, XV [PDF]

open access: yesFlora Montiberica, 2012
RESUMEN: Se proponen varias novedades peninsulares en el género Hieracium L. (Compositae) así como una reestructuración de H. loscosianum Scheele y especies afines.SUMMARY: Several novelties on Spanish Hieracium L.
Gonzalo Mateo Sanz
doaj   +2 more sources

Hieracium micevskii (Asteraceae), a new species from North Macedonia [PDF]

open access: yesBotanica Serbica, 2022
Hieracium micevskii is described and illustrated as a species new to science from the western part of North Macedonia. Taking into consideration the morphological characteristics, its origin is assumed to be hybrid.
Aco Teofilovski
doaj   +1 more source

rDNA-FISH pattern in selected Hieracium species representing different ploidy levels

open access: yesActa Societatis Botanicorum Poloniae, 2023
Polyploid species of Hieracium s.str. are near-obligatory apomicts capable of producing non-reduced pollen grains and intrageneric crossing with sexual diploid species.
Aleksandra Grabowska-Joachimiak   +4 more
doaj   +1 more source

Chromosome numbers for the Italian flora: 11 [PDF]

open access: yesItalian Botanist, 2021
In this contribution, new chromosome data obtained on material collected in Italy are presented. It includes counts for Centaurea aegusae, Hieracium racemosum subsp. lucanum, H. australe subsp. australe, Lysimachia arvensis subsp.
Giovanni Astuti   +6 more
doaj   +3 more sources

A cryptic powdery mildew (Golovinomyces hieraciorum sp. nov.) on Hieracium and Pilosella (Compositae)

open access: yesPhytopathologia Mediterranea, 2022
The Golovinomyces cichoracearum complex is morphologically highly variable and causes powdery mildew on a wide range of Compositae, including Hieracium spp. and Lapsana communis.
Guan-Xiu Guan   +8 more
doaj   +1 more source

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