Two new wild cassava species (Manihot, Euphorbiaceae) from the Brazilian Cerrado

Phytotaxa ◽  
2015 ◽  
Vol 213 (2) ◽  
pp. 131 ◽  
Author(s):  
Marcos José Silva

Manihot luxurians and M. confertiflora are herein described and illustrated. Both species were collected in the Chapada dos Veadeiros region during a taxonomic study of the genus Manihot in the Cerrado Biome. The morphological affinities, habitat, distribution, conservation status of both species are also provided.

2020 ◽  
Vol 12 ◽  
pp. 1-11 ◽  
Author(s):  
Fernanda Laurinda Valadares Ferreira ◽  
Francielle de Cássia Coelho Vieira ◽  
Izabelle de Paula Sousa ◽  
Flávio Pimenta Figueiredo ◽  
Leidivan Almeida Frazão

A lack of planning characterize the most demographic occupation process in Brazil, occurring in a disorderly manner and with inappropriate occupations, resulting in damage to natural resources. This process is recurrent in the Cerrado Biome, currently the agricultural frontier of the country. Thus, the objective of this work was to identify anthropic activities and classify the conservation status in the headsprings (water sources) and surroundings areas of a watershed inserted in the Cerrado biome, besides proposing measures to prevent and control the different degradation processes. From February to July 2016, visits were made to 37 headsprings and their surroundings, located in the watershed of Santa Fé de Minas River. Impacts of anthropic actions are identified directly or indirectly, classifying the areas according to the state of conservation: preserved, anthropized and degraded. All visited places presented some type of negative interference from human activities. The most frequent activities were unpaved roads, monoculture of eucalyptus and cattle farming. According to the classification, only 6% of the areas are on preserved condition, while 70% are anthropized and 24% degraded. The main types of found degradation were erosions in different stages, compaction and silting. In addition, no conservationist practices are present in the areas. Therefore, to reduce or prevent future degradation in the watershed, it proposed some mitigating actions, such as the isolation of headsprings and their surroundings, adaptation of roads and eucalyptus plantation areas, and maintenance of preservation areas.


Phytotaxa ◽  
2018 ◽  
Vol 360 (2) ◽  
pp. 91
Author(s):  
ANTONIO CAMPOS-ROCHA ◽  
ALAN WILLIAM MEEROW ◽  
JULIE HENRIETTE ANTOINETTE DUTILH

Monographic work on the genus Hippeastrum in Brazil has revealed two new species endemic to the Cerrado biome, here described and illustrated. Hippeastrum lunaris is a species restricted to the region of Chapada dos Veadeiros; H. mauroi is so far found only in Chapada dos Guimarães. Detailed descriptions, illustrations and taxonomic comments on the conservation status of these species are provided, in addition to comparisons with morphologically similar species. An identification key to the species of Hippeastrum occurring in the Brazilian Cerrado is presented, accompanied by photographs of these species in their natural habitats.


Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
LS Espindola ◽  
RG Dusi ◽  
KR Gustafson ◽  
J McMahon ◽  
JA Beutler

2019 ◽  
Vol 17 (3) ◽  
pp. 237-256
Author(s):  
Eldrin De Los Reyes ARGUELLES

In spite of the fact that epiphytic algae are considered an important component of freshwater ecosystems, our knowledge of their diversity and distribution is still rather poor. Taxonomic study on the composition of epiphytic algae living on submerged leaf and root tissues of macrophyte Nymphaea pubescens Willd, found at Laguna de Bay (Philippines), was conducted. In total, 21 algal taxa were identified: 10 Cyanophyceae, 6 Trebouxiophyceae, and 5 Bacillariophyceae. The taxa described in this study represent 13 orders, 16 families, 18 genera, and 21 species based on the recent combined taxonomical approach. Of these taxa, the occurrence of a rare cyanobacteria, Chroococcus schizodermaticus West, is reported for the first time in the Philippines. One species is also reported here for the first time in the Philippines, based on current taxonomic nomenclature, and this is Cyanothece aeruginosa (Nägeli) Komárek, which is based on the former name of Synechococcus aeruginosus Nägeli. These taxonomic records are considered important basal information in enriching the knowledge about the diversity and habitat distribution of cyanobacteria and microalgae in macrophytes found in freshwater habitats in the Philippines.


Author(s):  
Daniel Althoff ◽  
Lineu Neiva Rodrigues ◽  
Demetrius David da Silva

Phytotaxa ◽  
2014 ◽  
Vol 156 (4) ◽  
pp. 235 ◽  
Author(s):  
Pedro Lage Viana ◽  
Tarciso S. Filgueiras

Three new Brazilian species of Aulonemia, a Neotropical woody bamboo genus, are described and illustrated: Aulonemia cincta, with its distinctive corky girdles; Aulonemia prolifera, characterized, among other Brazilian congeners, by its fimbriate leaf sheaths; and Aulonemia soderstromii, with its conspicuous cluster of spreading fimbriae. These new species all propagate by amphipodial rhizomes, an unusual feature shared with the Brazilian species A. aristulata, with which they are morphologically compared. Comments about habitat, distribution, phenology, and conservation status for each species are provided, as well as photographs taken in the wild.


Zootaxa ◽  
2013 ◽  
Vol 3736 (2) ◽  
pp. 128 ◽  
Author(s):  
FELIPE FRANCISCO BARBOSA ◽  
ANDRÉ SILVA FERNANDES ◽  
LEANDRO GONÇALVES OLIVEIRA

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