Taxonomic revision and morphological delimitation of Oxalis sect. Ripariae (Oxalidaceae)

Phytotaxa ◽  
2021 ◽  
Vol 529 (1) ◽  
pp. 125-159
Author(s):  
ANELISE NUERNBERG-SILVA ◽  
PEDRO FIASCHI
Keyword(s):  
Conservation Status ◽  
Taxonomic Revision ◽  
Second Step ◽  
Morphological Description ◽  
South American ◽  
Southern Brazil ◽  
Distribution Map ◽  
Phylogenetic Studies ◽  
A New Species ◽  
Near Threatened

Phylogenetic studies indicate that several infrageneric taxa in Oxalis require taxonomic updates to attain monophyly. In this contribution, we update the morphological delimitation of the South American Oxalis sect. Ripariae and provide a taxonomic revision of the currently accepted species. The sectional delimitation was carried out by comparing micro- and macromorphological features of Oxalis sect. Ripariae, O. sect. Corniculatae, and O. sect. Myriophyllum. These sections share yellow flowers and aerial stems. Glandular hairs and larger seeds with the surface longitudinally crested and with projections are exclusive to Oxalis sect. Ripariae. We accept 11 species in the section, including three previously placed in Oxalis sect. Corniculatae (i.e., O. eriocarpa, O. niederleinii, and O. refracta), but excluding O. serpens and O. subvillosa, which are moved to O. sect. Corniculatae. We also describe a new species (Oxalis lourteiginana), propose a new name and status for O. bifrons subsp. littoralis (now O. pampeana), the synonymization of O. irreperta with O. riparia, six second-step lectotypifications, and one epitypification. For each accepted species we provide a morphological description, illustrations, ecological and taxonomic information, conservation status following IUCN, and a geographic distribution map. Most species occur in southern Brazil, but the section is widespread also in Argentina, Uruguay, and eastern Paraguay. Six species are categorized as threatened and further three as near threatened. Besides, we provide an identification key for the taxa of the section.

Novelties in Persicaria (Polygonaceae): description of a narrowly endemic new species from southern Brazil, and typification of the name Polygonum minus

Phytotaxa ◽  
2021 ◽  
Vol 490 (1) ◽  
pp. 60-70
Author(s):  
LUÍS A. FUNEZ ◽  
GUSTAVO HASSEMER
Keyword(s):  
New Species ◽  
Morphological Description ◽  
Southern Brazil ◽  
Distribution Map ◽  
Morphological Comparison ◽  
Polygonum Minus ◽  
Narrow Area ◽  
Eurasian Species ◽  
A New Species ◽  
Locus Classicus

A new species of Persicaria, P. humboldtiana, endemic to a narrow area of waterfalls in Corupá, southern Brazil, is described in the present paper. The locus classicus of the new species is well-known for plant endemisms. A complete morphological description, original pictures, a distribution map, and a morphological comparison with the similar Eurasian species P. minor (≡ Polygonum minus) are given. The name Polygonum minus is lecto- and epitypified on, respectively, a Morison’s illustration and a specimen preserved at BM.

Hysterionica chamomilloides (Asteraceae: Astereae) a new species from the grassland ecosystem of Río de La Plata

Phytotaxa ◽  
2021 ◽  
Vol 482 (1) ◽  
pp. 36-44
Author(s):  
LEONARDO PAZ DEBLE
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Morphological Description ◽  
Similar Species ◽  
South American ◽  
Review Of Literature ◽  
South American Species ◽  
Field Surveys ◽  
Mountainous Regions ◽  
A New Species

Hysterionica s.l. (including Neja) comprises ca. 15 species distributed mainly in the grasslands of southern Brazil, Uruguay, central and northern Argentina and Southern Paraguay. Based on field surveys, study of nomenclatural types and other specimens, and review of literature, a new species is proposed here, Hysterionica chamomilloides, endemic of mountainous regions of northern Uruguay, and southwestern Rio Grande do Sul state, Brazil. This work provides a detailed morphological description of the new species, information on its geographic distribution, habitat, phenology, conservation status, and discusses the main differences between H. chamomilloides and the morphologically most similar species. Illustrations, images and a key to the South American species of Hysterionica are also supplied.

Taxonomy of Sisyrinchium sect. Cephalanthum (Iridaceae: Iridoideae) in Southern Brazil

Phytotaxa ◽  
2020 ◽  
Vol 475 (3) ◽  
pp. 125-177
Author(s):  
CAMILA DELLANHESE INÁCIO ◽  
LILIAN EGGERS
Keyword(s):  
Geographical Distribution ◽  
Taxonomic Revision ◽  
South American ◽  
Southern Brazil ◽  
Morphological Similarity ◽  
Distribution Maps ◽  
Molecular Features ◽  
Phylogenetic Studies ◽  
New Synonym ◽  
Botanical Illustrations

Here we present a first contribution to the taxonomic revision of Sisyrinchium (Iridaceae: Iridoideae) for Southern Brazil. Sisyrinchium sect. Cephalanthum is one of the six sections in which the Brazilian species of the genus are classified, and the second largest in number of taxa. This monograph presents the taxonomic treatment of 22 taxa characterized by a unique set of morphological and molecular features, assigned to the section by phylogenetic studies, as well as the unplaced S. elegantulum, which is included here due to morphological similarity. A new status and a new synonym are proposed, and nine lectotypes and one neotype are designated. An identification key is provided, and species are described, accompanied by botanical illustrations, pictures, and distribution maps. In addition, geographical distribution, habitat, phenology, notes, and examined specimens are presented. Species of the section are mainly distributed in the South American biogeographic dominions of Chacoan and Parana.

Hornschuchia mellosilvae (Annonaceae) a new species endemic to the Brazilian Atlantic Forest

Phytotaxa ◽  
2021 ◽  
Vol 520 (3) ◽  
pp. 273-278
Author(s):  
JENIFER DE CARVALHO LOPES ◽  
LUCAS VILELA ◽  
DAVID M. JOHNSON
Keyword(s):  
Atlantic Forest ◽  
Conservation Status ◽  
Biodiversity Hotspot ◽  
Morphological Description ◽  
Distribution Map ◽  
Moist Forest ◽  
Different Types ◽  
Endemic Genera ◽  
Semideciduous Seasonal Forest ◽  
A New Species

The Atlantic Forest is a biodiversity hotspot that includes different types of phytophysiognomies, mainly forests. Hornschuchia, Annonaceae, is one of its endemic genera. Eight Hornschuchia species are found in the tropical moist forest, three of them both occurring in tropical moist forest and tabuleiro forest, a semideciduous seasonal forest, one occurs in the coastal semideciduous seasonal forest and two inhabit the semideciduous seasonal forest and deciduous seasonal forest far from the coast in Bahia. Here we describe the twelfth species of Hornschuchia, which occurs in the Bahian semideciduous seasonal forest, and present a morphological description, illustration, distribution map and assessment of its conservation status.

Myrcia suberosa: a new species of Myrcia sect. Eugeniopsis (Myrciinae, Myrteae, Myrtaceae) endemic to the Atlantic Forest

Phytotaxa ◽  
2020 ◽  
Vol 450 (1) ◽  
pp. 95-101
Author(s):  
MATHEUS FORTES SANTOS ◽  
THIAGO FERNANDES
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Conservation Status ◽  
Taxonomic Revision ◽  
Morphological Description ◽  
Sexual System ◽  
Real Distribution ◽  
Southern Bahia ◽  
Cork Thickness ◽  
A New Species

A new species, Myrcia suberosa, is here proposed based in an ongoing taxonomic revision of Myrcia sect. Eugeniopsis, a group nearly endemic to the Atlantic Forest. Myrcia suberosa occurs in Brazil from Southern Bahia to Southern Rio de Janeiro states, but only three collections are known and the real distribution of the species is barely known. The new species is morphologically related to Myrcia pseudomarlierea and Myrcia teuscheriana, differing by sexual system, cork thickness, indument, and leaf and flower morphologies. Morphological description, images and conservation status are provided, as well as discussion about distribution, habitat, phenology and taxonomy.

Schinus pampeana (Anacardiaceae): a new endangered species from Rio Grande do Sul, Brazil

Phytotaxa ◽  
2020 ◽  
Vol 452 (4) ◽  
pp. 278-287
Author(s):  
SÉRGIO AUGUSTO DE LORETO BORDIGNON ◽  
CLEUSA VOGEL ELY
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Rio Grande ◽  
Morphological Description ◽  
Similar Species ◽  
Rio Grande Do Sul ◽  
Distribution Map ◽  
Ecological Data ◽  
Status Assessment ◽  
A New Species

Schinus pampeana is a new species from Brazilian Pampa. The new species was tentatively included in Schinus sect. Terebinthifolia, and is morphologically most similar to Schinus lentiscifolia and S. weinmanniifolia. We present here a detailed morphological description, a geographical distribution map, IUCN conservation status assessment, ecological data, photographs, and a table of diagnostic characters of S. pampeana and the most similar species. Schinus pampeana increases the total number of Schinus to about 49 species, of which eleven are recorded in Brazil.

scholarly journals Taxonomic revision of Mcvaughia W.R.Anderson (Malpighiaceae): notes on vegetative and reproductive anatomy and the description of a new species

PhytoKeys ◽  
2019 ◽  
Vol 117 ◽  
pp. 45-72 ◽  
Author(s):  
Rafael F. Almeida ◽  
Isabel R. Guesdon ◽  
Marcelo R. Pace ◽  
Renata M.S. Meira
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Taxonomic Revision ◽  
The State ◽  
Distribution Map ◽  
Secondary Phloem ◽  
Reproductive Anatomy ◽  
A New Species

A taxonomic revision ofMcvaughiais presented, including the description of a new species from the state of Piauí, Brazil, and notes on wood, secondary phloem, leaf, and floral morpho-anatomy. We present a key to the species, full morphological descriptions, a distribution map, and notes on distribution, ecology, etymology, and conservation status for each species.

Rhamnidium riograndense (Rhamnaceae), a new species from southern Brazil

Phytotaxa ◽  
2021 ◽  
Vol 510 (1) ◽  
Author(s):  
MAURÍCIO FIGUEIRA ◽  
BIANCA SCHINDLER
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Rio Grande ◽  
South American ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
South American Species ◽  
Present Information ◽  
Rocky Habitats ◽  
A New Species

A new species, Rhamnidium riograndense, from southern Brazil, is here described and illustrated. We present information about its distribution, habitat, phenology, conservation status and a key for all the South American species of the genus is provided. The new species is endemic to the central part of the state of Rio Grande do Sul, in the transition between Paraná and Pampean provinces in rocky habitats, mostly mountain slopes, where only four populations are currently known.

Monteiroa rubra (Malvaceae: Malvoideae), a New Species Endemic to the Southern Brazilian Grasslands

2019 ◽  
Vol 44 (4) ◽  
pp. 851-856
Author(s):  
Martin Grings ◽  
Sérgio Augusto de Loreto Bordignon ◽  
Ilsi Iob Boldrini
Keyword(s):  
New Species ◽  
Rio Grande ◽  
The Other ◽  
Morphological Description ◽  
Similar Species ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Distribution Map ◽  
A New Species ◽  
Iucn Criteria

Abstract—Monteiroa rubra is described as a remarkable new species from Rio Grande do Sul, Brazil. It is notably distinct from the other ten species of Monteiroa. The new species is morphologically most similar to the four species of the genus with unlobed leaves that also lack cordate leaf bases. Monteiroa rubra apparently is an endemic species known from three localities in wetlands associated with grasslands in Augusto Pestana and Fontoura Xavier municipalities in southern Brazil. A morphological description, distribution map, photographs, ecological notes, and a key to morphologically most similar species are presented. According to IUCN criteria, if a formal assessment were performed, the new species would probably be considered Endangered.

Baccharis rectialata (Compositae: Astereae): a new species of carqueja from Uruguay

Phytotaxa ◽  
2021 ◽  
Vol 478 (2) ◽  
pp. 253-260
Author(s):  
MARÍA VICTORIA VALTIERRA ◽  
EDUARDO MARCHESI ◽  
GUSTAVO HEIDEN ◽  
JOSÉ M. BONIFACINO
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Morphological Description ◽  
Similar Species ◽  
Distribution Map ◽  
A New Species ◽  
Straight Wing

Baccharis rectialata (Compositae: Astereae), a new species of B. sect. Caulopterae from the grasslands in northeastern Uruguay is described. The new species is morphologically similar to B. crispa and can be differentiated by its straight wing margins, shorter involucres and pappus in staminate capitula. We provide a detailed morphological description, and information on the distribution, habitat, phenology, and conservation status. Additionally, we discuss the main differences between B. rectialata and other closely related and morphologically similar species, and provide a key for identification of subshrubs belonging to B. sect. Caulopterae occurring in Uruguay, as well as illustrations, images, and a distribution map of the new species.

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