A new species of Chiliotrichiopsis (Asteraceae: Astereae) from Peru

Chiliotrichiopsis peruviana Nesom, H. Rob. & Granda, a new species from Dept. Ayacucho in southwestern Peru, is described and illustrated. It is the only rayless species of the genus, now expanded to four species, and the only one that occurs outside of Argentina.Chiliotrichiopsis is one of six shrubby South American genera of Astereae (subtribe Hinterhuberinae) with paleate receptacles. Observations on morphology and a key to these genera provide perspective for the generic placement of the new species.     

A new Haplopappus (Asteraceae: Astereae) from Nevada

A new species, Haplopappus graniticus, is described and illustrated. Its relationships seemingly lie with section Tonestus but its narrow heads and imbricated phyllaries are anomalous in that section.     

Two new species of Grindelia (Astereae,Asteraceae) from Uruguay

Taxonomic revision of South American species ofGrindelia Willd. has revealed two new species from Uruguay:G. rupestris, an erect subshurb with crowded obovate denticulate leaves, subsessile heads, and pappus composed of numerous awns, andG. linearifolia, a prostrate shrublet with small entire linear leaves. Both species are described and illustrated. A key for the UruguayanGrindelia species is provided.     

New species of llerasia (Asteraceae: Astereae) from Peru

Two new species from Peru,Llerasia pascoensis Sagást. & Dillon andLl. sanmartinensis Sagást. & Dillon are described and illustrated, and their relationships discussed. A key to the Peruvian species ofLlerasia is presented. Also, a notable range extension into northern Peru is reported forLl. lindenii Triana, a species previously known only from Colombia and Ecuador.     

Two new species of Haplopappus (Astereae, Asteraceae) from Mendoza, Argentina

A review of the Argentinean specimens ofHaplopappus Cass. has revealed two new species from Mendoza province, both of the sectionHaplopappus:H. boelkei, unique by its caespitose habit and long petiolate leaves, andH. mendocinus, related toH. macrocephalus (Less.) DC.,H. ochagavianus Phil. andH. tiltilensis Phil.     

A new species of Coreopsis section Pseudoagarista (Asteraceae) from Mexico

Coreopsis queretarensis, a new species from northeastern Mexico belonging to sectionPseudoagarista, is described and illustrated. It is closely related toC. mevaughii of Nueva Galicia but is readily distinguished by leaf shape, involucral bracts, and details of corolla.     

Erigeron astranthioides (Asteraceae: Astereae), a new epappose species from western Mexico

A new species,Erigeron astranthioides, apparently endemic to the Sierra Madre of central Durango, is described and illustrated. It is contrasted withE. forreri (Greene) Greene andAstranthium, both of which are similar, though apparently through convergence. The new species is part of a lineage that includes six other primarily epapposeErigeron species mostly from the western Sierra Madre; within this group its closest relative appears to beE. mimus (S. F. Blake) Nesom, with which it is compared.     

A new species of Ionactis (Asteraceae: Astereae) from Southern Nevada and an overview of the genus

Ionactis caelestis Leary & Nesom is a new species known from a single population that occurs on the Aztec Sandstone near Bridge Mountain in the Spring Mountains of Clark County, Nevada. It is placed in the genus Ionactis (=Aster subg. Ianthe) on the basis of its crowded, multicipital crown, lack of persistent basal leaves and presence of densely arranged cauline ones, strongly carinate phyllaries, blue rays, disc style branches with linear-lanceolate appendages, asymmetric carpopodia, double pappus, and chromosome number of 2n = 9 II. A key to the four species of the genus emphasizes the distinction of the new species in its taproot, the abundant, large, glandular trichomes on its stems and leaves, and disc flowers with sterile ovaries. Ionactis is more similar to the goldenaster (Heterotheca) lineage than to Aster, with which it has been allied formerly. The core of the goldenaster genera differ from Ionactis primarily in their yellow-rayed heads, the crystal complement within cells of their disc corollas, and their primarily multinerved achenes.     

A new species of Grindelia (Asteraceae, Astereae) from the Meseta del Somuncura (Patagonia), Argentina

Grindelia coronensis, a new species from the Meseta del Somuncura, Prov. Río Negro, Argentina, is described and illustrated. It is similar toG. chiloensis (Cornel.) Cabrera but it is readily distinguished by its leaves which are conspicuosly differentiated into a obovate blade and a long petiole.     

A new species of erigeron (Compositae: Astereae) from Chile

Erigeron campanensis, sect.Erigeron, is described as new from Central Chile (Cerro Campana, near Valparaiso). It is most similar toE. fasciculatus, from which it differs in leaf shape, leaf arrangement, pubescence of leaves, stems, and phyllaries, and stigmatic branches, of disc florets.     

Two new species of Senecio section Palmatinervii (Asteraceae) from northeastern Mexico

Two new species ofSenecio,S. sundbergii andS. neogibsonii, belonging to the sectionPalmatinervii are described, illustrated, and compared to their nearest relatives,S. aschenbornianus andS. lanicaulis.     

Two new species of Senecio section Palmatinervii (Asteraceae) from eastern Mexico

Two closely related new species,Senecio grimesii andS. marquezii, belonging to the sectionPalmatinervii are described, illustrated, and compared to their nearest relative,S. heterogamus. An erratum to this article is available at .     

Two new species of Verbesina section Ochractinia (Asteraceae) from South America

Two new species ofVerbesina sectionOchractinia are described:V. quetamensis from Colombia, a member of theV. synethes species group andV. carangolensis from Brazil, most closely allied withV. acuminata.     

Chrysothamnus eremobius (Asteraceae): A new species from Nevada

Chrysothamnus eremobius, endemic to mountains of southern Nevada, is formally described and illustrated. Morphological and anatomical comparisons are made to related taxa. The new species has many features likePetradoria discoidea (=C. gramineus). Although it bears some similarity toC. depressus andC. vaseyi of sectionPulchelli, C. eremobius is better placed in sectionChrysothamnus nearC. viscidiflorus.     

A new hexaploid species of Centaurea section Acrolophus (Asteraceae) from Evvia Island,Greece

Centaurea carystea Trigas & Constantin., a new yellow‐flowered species of Centaurea from Mt. Ochi on Evvia Island (Greece), is described and illustrated. It is a member of the polymorphic C. section Acrolophus and allied to taxa of the C. attica aggregate, C. pelia and C. mantoudii. The new species appears to be a local and threatened endemic, with the total number of individuals known being less than 500. A karyological examination revealed that it is hexaploid, with 2n = 6x = 54, an unusual number in Centaurea, which may indicate a hybrid origin. To further clarify the taxonomic position of C. carystea , we used random amplification of polymorphic DNA markers of 25 plants belonging to nine species, subspecies and varieties morphologically related to the new species, together with two reference taxa. Clustering using the unweighted pair group method with arithmetic mean indicated a discrete position for C. carystea , close to but distinct from the yellow‐flowered C. mantoudii. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008, 158 , 762–774.     

A new species of Pleiotaxis (Asteraceae) from Angola

A new species from Angola, Pleiotaxis angolensis (tribe Mutisieae, Asteraceae), is described. We detail the principal differences from the most similar taxon, Pleiotaxis subscaposa .     

A new species of Kleinia (Asteraceae) from Somalia

The new species Kleinia caespitosa, from crevices in limestone rocks at 1850–1900 m in northern Somalia, is described and illustrated. It is compared to the widespread and sympatric K. grantii, as well as to K. saginata in Oman.     

A new species of Centaurea (Asteraceae) from Sicily

A new species of Centaurea, Centaurea sicana , endemic to Sicily, is described. This new taxon is close to Centaurea parlatoris and Centaurea giardinae (Sect. Dissectae), the former occurring at Palermo and in the Madonie Mountains, while the latter occurs on the Etna volcano. The new species has so far been found only on the Sicani Mountains, a limestone mountain range in western Sicily, while the related species occur in the surrounding mountains. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society, 2008, 157 , 785–788.     

A new species of Viguiera (Asteraceae: Heliantheae) from Mexico

AlthoughViguiera hidalgoana, a new species from Hidalgo, Mexico, bears a superficial resemblance toV. dentata, it is clearly related to certain woody species of seriesGrammatoglossae.