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.     

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 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.     

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.     

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.     

Grindelia mendocina (Asteraceae, astereae), a new South American species

Taxonomic revision of South American species of Grindelia Willd. has revealed a new species from Argentina, with homogamous capitula and cushion-shaped habit. The taxon is here described and illustrated.     

A new species of machaeranthera section psilactis (Asteraceae: Astereae) from coastal Texas

Machaeranthera heterocarpa, a new species from southern Texas, is described and illustrated. It is closely related to M. tenuis of Trans-Pecos Texas, is described Mexico from which it differs most notably in stem pubescence, fruit morphology, and chromosome number. The adaptive significance of the heteromorphic achenes of this new species is discussed.     

胶菀属——中国菊科紫菀族的一个新归化属

报道中国东北辽宁省发现的菊科（Asteraceae）紫菀族（Astereae）一个新归化属胶菀属（Grindelia）。它在外形上接近于旋覆花属（1nula）,但区别在于胶菀属花药基部钝,花柱分枝顶端附属物呈披针形或三角形,冠毛鳞片状。依据在中国所采集的标本描述了该属在中国的唯一代表种胶菀（Grindelia squarrosa）的形态特征,并讨论了其自然分布和进入中国的可能途径。     

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.     

Two new species of Eupatorium (Asteraceae) from northeastern Mexico

Two closely related new species ofEupatorium,E. tamaulipanum from southeastern Tamaulipas andE. xalapanum from central Veracruz, are described herein. The latter is diploid with 2n=20. Their relationship appears to be with the genusEupatoriastrum (subtribe Critoniinae, sensu Robinson and King), but an equally good case might be made for inclusion in the generaChromolaena, Bartlettina, orTamaulipa of subtribes Praxelinae, Hebecliniinae, and Gyptidinae respectively, as circumscribed by King and Robinson. While their splintered treatment ofEupatorium, and the Eupatorieae generally, often provides unequivocal “generic” placement of known or newly described species, many others appear to be rather arbitrarily placed, including some whose possible generic positions might include three or more of their subtribal groupings.     

Two new species of Lessingianthus (Vernonieae, Asteraceae) from the Brazilian highlands

Two additional species of Lessingianthus , L. bakerianus and L. lanuginosus , from the campo cerrado vegetation of central Brazil, are described and illustrated. The first species is characterized by the presence of capitula arranged in groups, nine to 12 florets per head, leaves sessile, oblong to ovate leaf blades with the lower surface densely lanate, sparsely villous on the main veins. It has certain resemblance to L. syncephalus (Sch. Bip. ex Baker) H. Rob. and L. brevipetiolatus (Sch. Bip. ex Baker) H. Rob., which present petiolate leaves and leaf blades lanceolate, cuneate or attenuate at the base. L. lanuginosus is superficially similar to L. buddleiifolius (Mart. ex DC.) H. Rob., but differs in having smooth stems, woolly indumentum, smaller heads and the largest leaves disposed at the middle of the stem.  © 2006 The Linnean Society of London, Botanical Journal of the Linnean Society, 2006, 150 , 487–493.     

Two new species of Dicoma (Asteraceae) from Somalia and Ethiopia

Two new species of the genus Dicoma, D. popeana from Somalia and D. aethiopica from Ethiopia, both of the section Psilocoma , are described and illustrated. The two species are distinguished from D. anomala and other similar taxa by a morphologic diagnostic key.     

Two new species of Vernonia (Asteraceae: Vernonieae) from Panama

Two new species,Vernonia cocleana andV. chiriquiensis, are described from Panama. These endemic species are distinct from those in Central America and most closely resemble taxa in the West Indies and Argentina, respectively. These taxa are described and illustrated; a key is provided to the Panamanian species ofVernonia.     

Two new species of the genus Cousinia (Asteraceae) from Iran

Cousinia perspolitanus and C. khansaricus are described and illustrated. They are assigned to section Cynaroideae because of the appendiculate bracts and decurrent leaves. SEM of achene and pollen are presented.     

Two new species of Vernonia (Asteraceae: Vernonieae) from Peru

Two new species,Vernonia sagasteguii andV. paucartambensis, from Peru are described, illustrated, and their relationships discussed.     

Two new species of the genus Dicoma (Asteraceae) from Somalia

Two new species, Dicoma gillettii and Dicoma scoparia (Asteraceae), both from Somalia, are described and illustrated. The differences between the new species and related taxa are listed.     

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.     

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.