Revisiting the taxonomy and nomenclature of Eriocaulon modestum (Eriocaulaceae)

Phytotaxa ◽  
2020 ◽  
Vol 461 (4) ◽  
pp. 275-285
Author(s):  
EARL CELESTINO DE OLIVEIRA CHAGAS ◽  
JAMES LUCAS DA COSTA-LIMA
Keyword(s):  
Species Level ◽  
Complete List ◽  
Infraspecific Taxa

The taxonomy of Eriocaulon modestum and its infraspecific taxa is revised. Eriocaulon modestum var. brevifolium and E. modestum f. viviparum are accepted as distinct taxa and raised to the species level under the names E. candango E.C.O.Chagas and E. ibeji E.C.O.Chagas, respectively. We present a complete list of synonyms and examined specimens of E. modestum and a comparative morphological table for the three species. In addition, we designate lectotypes for the names E. modestum and its synonyms E. burchellii, E. glaziovii, E. melanolepis, and E. proximum.

Plastome and Nuclear Phylogenies of Dwarf Mistletoes (Arceuthobium: Viscaceae)

2021 ◽  
Vol 46 (2) ◽  
pp. 389-402
Author(s):  
Adam C. Schneider ◽  
Kate M. Sanders ◽  
Jacob H. Idec ◽  
Yun Jee Lee ◽  
Shawn C. Kenaley ◽  
...  
Keyword(s):  
New World ◽  
Sequence Data ◽  
Strong Support ◽  
Species Level ◽  
Species Relationships ◽  
Plastome Evolution ◽  
Subspecies Level ◽  
Infraspecific Taxa ◽  
Ribosomal Cistron ◽  
Number Of Individuals

Abstract— Dwarf mistletoes are a lineage of morphologically-reduced stem parasites inhabiting Pinaceae and Cupressaceae throughout the northern hemisphere and equatorial East Africa. Though diagnosable by a suite of morphological traits, phylogenetic knowledge of species relationships has been limited to studies employing either comprehensive taxonomic sampling of one or two genes, or more sequence data from a limited number of individuals. We used data from genome skimming to assemble 3kb of the nuclear ribosomal cistron and up to 45kb of the plastome to clarify the phylogenetic root of the genus, monophyly of species, and relationships among infraspecific taxa. Genomic differentiation among terminal taxa was variable; however, we found strong support for reciprocally monophyletic New World and Old World lineages, congruent nrDNA and plastome topologies at the species level and below, and monophyly of most taxonomic sections and species. Plastome gene content was stable across the genus with minimal pseudogenization or loss, as in other hemiparasites, with the notable exception of cemA. These findings form the basis of our re-evaluation of historical biogeographical hypotheses, species- and subspecies-level taxonomy, and plastome evolution in Arceuthobium. More broadly, this work provides a foundation for future clade-focused comparative and biosystematics studies of Arceuthobium.

scholarly journals The Hintons’ legacy to the knowledge of the flora of Mexico

2019 ◽  
Vol 97 (3) ◽  
pp. 447
Author(s):  
George S. Hinton ◽  
José Luis Villaseñor ◽  
Enrique Ortiz
Keyword(s):  
Vascular Plants ◽  
Species Level ◽  
Complete List ◽  
Flora Of Mexico ◽  
Three Generations ◽  
Source Of Information ◽  
Species Study

<p><em>Background</em>: The Hinton family comprises three generations of plant collectors that have made an important contribution to the knowledge of the flora of Mexico. They have collected in 13 Mexican states and have provided material for the description of 8 genera and about 555 species new to science.</p><p><em>Question</em>: What is the contribution of the collections of the Hintons to our knowledge of the flora of Mexico? Where was their main collecting effort and how many species have been recorded?</p><p><em>Species study</em>: Vascular plants</p><p><em>Study site</em>: Mexico</p><p><em>Method</em>: Different national and foreign databases were consulted and a list of species collected by the Hintons was obtained. The records were reviewed to eliminate synonymy and a complete list of species and their distribution by states was compiled.</p><p><em>Results</em>: A total of 28,947 records were obtained and 25,717 of them were identified to species level. In addition to the family's collection, the herbaria with the largest number of records are LL-TEX, K, IEB, and MEXU. The records come from about 2,752 different collecting localities throughout Mexico and account for 5,730 species, 1,573 genera, and 233 families.</p><p><em>Conclusions</em>: Many of the specimens collected by the Hintons come from areas that are still  underexplored today. The contribution of the Hinton family to the knowledge of the flora of Mexico represents an important legacy and their collections constitute an enduring source of information for people interested in the flora of Mexico<em>.</em></p>

A revised check-list of the seaweeds of Britain

2015 ◽  
Vol 96 (5) ◽  
pp. 1005-1029 ◽  
Author(s):  
Juliet Brodie ◽  
Joanna Wilbraham ◽  
Jane Pottas ◽  
Michael D. Guiry
Keyword(s):  
Native Species ◽  
Species Level ◽  
Molecular Techniques ◽  
Check List ◽  
Infraspecific Taxa ◽  
Depth Study ◽  
The Impact

A revision of the check-list of the red (Rhodophyta), green (Chlorophyta) and brown (Ochrophyta, Phaeophyceae) seaweeds of Britain has been compiled and revealed 644 taxa, mostly at species level but including infraspecific taxa: 348 reds, 110 greens and 186 browns. There were 30 additions to the list, notably five newly described species and five new non-native additions. In addition to the check-list, an updated list of non-native species was compiled based on a stringent review of the available evidence. We have listed 31 non-native species (~5% of the flora), although the numbers may be considerably higher and probably include species that are effectively naturalized and perceived to be part of the indigenous flora. The check-list is discussed in relation to the impact of molecular techniques on the identification, taxonomy and phylogeny of species, and points to the need for a comprehensive, in-depth study on the identity and relationships of the seaweeds of Britain.

scholarly journals Taxonomic notes on Acanthopsis Harv. (Acanthaceae, tribe Acantheae): the group with trifid bracts

Phytotaxa ◽  
2017 ◽  
Vol 295 (3) ◽  
pp. 201 ◽  
Author(s):  
HESTER M. STEYN ◽  
ABRAHAM E. VAN WYK
Keyword(s):  
South Africa ◽  
New Species ◽  
Conservation Status ◽  
Species Level ◽  
New Subspecies ◽  
Identification Keys ◽  
Infraspecific Taxa ◽  
Northern Cape ◽  
One New Species ◽  
African Genus

In the southern African genus Acanthopsis, the morphology of the bracts is taxonomically useful at the species level. This contribution focuses on the taxonomy and conservation status of those members of the genus characterized by inflorescences with trifid bracts, all of which are confined to arid parts of the Northern Cape Province, South Africa. Three species (A. dregeana, A. glauca and A. tetragona) and four subspecies are recognised in this group. One new species (A. tetragona) with two subspecies (A. tetragona subsp. tetragona and A. tetragona subsp. pedunculata) and one new subspecies (A. dregeana subsp. longispina) are described. Identification keys to the species and infraspecific taxa of the group with trifid bracts are provided.

Analysis of the size and composition of the southern African flora

Bothalia ◽  
1984 ◽  
Vol 15 (3/4) ◽  
pp. 613-629 ◽  
Author(s):  
G. E. Gibbs Russell
Keyword(s):  
Species Richness ◽  
Southern Africa ◽  
Species Level ◽  
African Flora ◽  
The World ◽  
Infraspecific Taxa ◽  
African Plants ◽  
First Time

The southern African flora has been surveyed for the first time at species level in the List of Species of Southern African Plants (Gibbs Russell e tal., 1984). The numbers of taxa recorded for southern Africa are compared to the numbers reported from other parts of Africa, and the largest families in each area are listed and compared The species richness of southern Africa is compared to that of other parts of the world. The numbers of genera, species and infraspecific taxa are given for each familv in the souihern African flora, and compared to previous counts bv Dyer (1975. 1976) and Goldblatt (I97H).

Viburnum cotinifolium D. Don and two new infraspecific taxa

1986 ◽  
Vol 97 (3-4) ◽  
pp. 129-133
Author(s):  
T. R. Dudley
Keyword(s):  
Infraspecific Taxa

ERRORS ASSOCIATED WITH HERBAGE DISSECTION ANALYSES 2. Problems of species identification

1976 ◽  
pp. 213-225
Author(s):  
I.M. Ritchie ◽  
C.C. Boswell ◽  
A.M. Badland
Keyword(s):  
New Zealand ◽  
Dry Weight ◽  
Analytical Tool ◽  
Species Level ◽  
Weight Basis ◽  
Plant Identification ◽  
Leaf Fragment ◽  
Research Division ◽  
Or Groups ◽  
Botanical Analysis

HERBACE DISSECTION is the process in which samples of herbage cut from trials are separated by hand into component species. Heavy reliance is placed on herbage dissection as an analytical tool ,in New Zealand, and in the four botanical analysis laboratories in the Research Division of the Ministry of Agriculture and Fisheries about 20 000 samples are analysed each year. In the laboratory a representative subsample is taken by a rigorous quartering procedure until approximately 400 pieces of herbage remain. Each leaf fragment is then identified to species level or groups of these as appropriate. The fractions are then dried and the composition calculated on a percentage dry weight basis. The accuracy of the analyses of these laboratories has been monitored by a system of interchanging herbage dissection samples between them. From this, the need to separate subsampling errors from problems of plant identification was, appreciated and some of this work is described here.

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