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1.
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.  相似文献   

2.
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.  相似文献   

3.
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.  相似文献   

4.
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.  相似文献   

5.
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.  相似文献   

6.
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.  相似文献   

7.
Two new species,Vernonia sagasteguii andV. paucartambensis, from Peru are described, illustrated, and their relationships discussed.  相似文献   

8.
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.  相似文献   

9.
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.  相似文献   

10.
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.  相似文献   

11.
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.  相似文献   

12.
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 .  相似文献   

13.
John Olsen 《Brittonia》1982,34(3):282-284
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.  相似文献   

14.
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.  相似文献   

15.
We describe two new species of the nemesiid spider genus Chaco from Rocha Province, Uruguay. These new species are diagnosed based on genital morphology, male tibial apophysis spination, and burrow entrance. We test cospecificity of one species, Chaco costai,via laboratory mating experiments. The new species are diagnosed and illustrated and habitat characteristics, and capture behavior are described. We conduct a cladistic analysis based on a previously published morphological character matrix that now includes the newly described species.  相似文献   

16.
Scorzonera joharchii sp. nov. is described from the Khorasan, east of Birjand, Iran. It is similar to S. tuberosa from which it mainly differs in its tomentose indumentum, longer pappus and villous and longer achenes.  相似文献   

17.
A new species from Angola, Pleiotaxis angolensis (tribe Mutisieae, Asteraceae), is described. We detail the principal differences from the most similar taxon, Pleiotaxis subscaposa .  相似文献   

18.
T. M. Barkley 《Brittonia》1978,30(1):69-75
Senecio moranii, Senecio martirensis, andSenecio semperamatae, all from Mexico, are described as new.  相似文献   

19.
Herbertia crosae (Iridaceae) is described from the stony grasslands of northwestern Uruguay. The new species resemblesHerbertia lahue but can be easily distinguished by the narrower leaves, slender habit, the smaller pale lilac flowers, the presence of yellow spots at the base of the tepals, the red, adpressed hairs along the filament column, the presence of filaments free at the apex, the channeled style arm, the recurved secondary divisions of the style arm, and the smaller fruits. A key to the species of the genus is provided in which five species are now recognized.  相似文献   

20.
Eupatorium leonardii, presently known only from Mt. Mingan in the border region between Aurora and Nueva Ecija Provinces in Luzon, Philippines, is described and illustrated. The new species is remarkable because it is the only woody representative of the genus with a peculiar spiral phyllotaxy. Previously, Eupatorium s. str. consisted of herbs with opposite or verticillate phyllotaxy.  相似文献   

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