scholarly journals ANATOMY OF ECHINODORUS (ALISMATACEAE) SCAPES FROM NORTHEASTERN BRAZIL AS APPLIED TO TAXONOMY

2008 ◽  
Vol 65 (1) ◽  
pp. 11-21 ◽  
Author(s):  
L. Q. Matias ◽  
A. Soares ◽  
V. L. Scatena
Keyword(s):  
Sympatric Species ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Vascular Bundles ◽  
Morphological Similarity ◽  
Taxonomic Importance ◽  
Anatomical Characters ◽  
Thin Walled

The anatomical characters of the scape of Echinodorus glandulosus, E. lanceolatus, E. palaefolius, E. paniculatus, E. pubescens and E. subalatus subsp. subalatus (Alismataceae) were examined. These six sympatric species occur in northeastern Brazil and demonstrate great morphological similarity. The aim of the present study was to identify anatomical characters of taxonomic importance. Scapes possess a uniseriate epidermis composed of thin-walled tabular cells. The scapes of most species have differentiated epidermis, cortex, and vascular cylinders. There are several layers of regular chlorenchyma cells immediately below the epidermis, intercalated with collateral vascular bundles, in all species. There are also laticiferous ducts throughout the scape, and aerenchyma in both the cortex and pith. The shape and outline of scapes, the presence and position of winged extensions, the absence of differentiated vascular cylinders or cortex, and the number of vascular bundles are important characters for differentiating species in Echinodorus. An identification key employing the features analysed is provided.

Generic Identification Key to Rattan Palms Based on Stem Anatomical Characters

IAWA Journal ◽  
1993 ◽  
Vol 14 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Gudrun Weiner ◽  
Walter Liese
Keyword(s):  
Identification Key ◽  
Vascular Bundles ◽  
Technological Properties ◽  
Special Significance ◽  
Generic Level ◽  
Dichotomous Key ◽  
Sieve Tubes ◽  
Anatomical Characters

The rattan palms consist of 13 genera which present distinct anatomical differences. Of special significance are the number of phloem fields and vessels per vascular bundie, type of ground parenchyma, occurrence of fibre rows in the cortex, 'yellow cap', raphide sacs, arrangement of sieve tubes and size of the fibre sheath of the outer vascular bundles. On the basis of these features a dichotomous key for the identification of the rattan genera has been developed. Since the technological properties of the c. 650 species differ considerably, this means of identification at least at the generic level is of practical value.

Reassessing species boundaries in the Syagrus glaucescens complex (Arecaceae) using leaf anatomy

Botany ◽  
2021 ◽  
pp. 379-387
Author(s):  
D.H.T. Firmo ◽  
S.A. Santos ◽  
M.E.M.P. Perez ◽  
P. Soffiatti ◽  
B.F. Sant’Anna-Santos
Keyword(s):  
Species Identification ◽  
Leaf Anatomy ◽  
Vascular System ◽  
Identification Key ◽  
Species Boundaries ◽  
Vascular Bundles ◽  
Geographical Isolation ◽  
Species Occurrence ◽  
Species Diagnosis ◽  
High Degree

The Syagrus glaucescens complex comprises three species: Syagrus glaucescens Glaz. ex Becc., Syagrus duartei Glassman, and Syagrus evansiana Noblick. Recently, a new population of S. evansiana that possesses a high degree of endemism was reported in the Serra do Cabral mountain. Here we intend to study the leaf anatomy of the S. glaucescens complex and confirm whether this newly found population (from now on called Syagrus aff. evansiana) belongs to S. evansiana or not. Specimens were collected to investigate their leaf anatomy, which showed distinct differences between S. aff. evansiana and S. evansiana. The midrib anatomy revealed novelties for the S. glauscecens complex, proving useful for species diagnosis. Features such as accessory vascular bundles around the vascular system of the midrib and the number of collateral bundles are diagnostic for species identification. In addition, morphological and anatomical analyses indicated a correlation with the species occurrence. We found greater similarity between S. glaucescens and S. duartei, while S. evansiana and S. aff. evansiana are more alike. Here, we propose a new identification key based only on the leaf anatomy. Despite their morphological similarities, S. aff. evansiana and S. evansiana presented differences in leaf anatomy, which — when associated with their geographical isolation — suggests a fourth taxon in the complex.

Two new species of Ctenitis (Dryopteridaceae) from South America and taxonomic notes on similar species

Phytotaxa ◽  
2015 ◽  
Vol 239 (1) ◽  
pp. 1 ◽  
Author(s):  
Raquel Stauffer Viveros ◽  
Alexandre Salino
Keyword(s):  
New Species ◽  
South America ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Southeastern Brazil ◽  
Similar Species ◽  
New Synonyms ◽  
Two New Species

Two new species of Ctenitis (Dryopteridaceae) from South America are described and illustrated: Ctenitis christensenii is endemic to southeastern Brazil and C. glandulosa occurs from southeastern to northeastern Brazil and in Guyana. An identification key and notes about the distribution, habitat and taxonomy of the new species, C. falciculata and allies are provided. Moreover, seven lectotypifications and two new synonyms are proposed.

scholarly journals Use of morphological and anatomical characters to delimit varieties of Paliurus spina-christi Mill. (Rhamnaceae)

2018 ◽  
Vol 6 (2) ◽  
pp. 1-14
Author(s):  
Saleem E. Shahbaz ◽  
Nazar M. Shareef
Keyword(s):  
Stomatal Density ◽  
Vascular Bundles ◽  
Epidermal Layer ◽  
Adaxial Side ◽  
Anatomical Features ◽  
Northern Iraq ◽  
Anatomical Characters ◽  
Palisade Cells ◽  
Different Parts ◽  
Fruit Diameter

Introduction: Paliurus spina-christi Mill is a species with two varieties namely Paliurus spina-christi L. var. spina-christi and Paliurus spina-christivar. macrocarpa Beck native to mountains of Kurdistan, rarely growing in the upper plains of northern Iraq. Materials and Methods: A total of 15 plants from different parts of Kurdistan region were sampled. 30measurements for each characters of Leaf, Inflorescence, Flowers, Fruit, seeds, and leaf anatomical characters were measured for comparison between the two varieties. Results and Discussion: Fruit diameter of var. macrocarpa is significantly larger than fruit diameter of var. spina-christi. Most mean flower parts especially the ovary, in addition to seed size is larger in var. macrocarpa. Upper epidermal layer is always thicker than the lower epidermal layer for the same blade. The isobilateral mesophyll includes 2 layers of long palisade cells adaxially and 2-3 layers of short cells abaxially. Many vascular bundles are seen equally spaced in the mesophyll tissue.With the exception of the presence of simple hairs on the petiole adaxial side of the var. spina-cristi and the absence of these hairs from the same site of var. macrocarpa, all other anatomical features are considered to be of no taxonomic application. Stomatal density of the adaxial leaf side is up to 19 stomata per mm² in var. spina-christi while it is up to 38 stomata per mm² in var. macrocarpa. Conclusions: Both fruit diameter and the stomatal density of the adaxial leaf side constitute diagnostic characters for separating between the two varieties of Paliurus spina-christi Mill

A new Hydrometra (Hemiptera: Heteroptera: Hydrometridae) from northeastern Brazil, with a key to the species recorded from the country

Zootaxa ◽  
2013 ◽  
Vol 3619 (1) ◽  
pp. 70-74 ◽  
Author(s):  
FELIPE FERRAZ FIGUEIREDO MOREIRA ◽  
JULIANNA FREIRES BARBOSA
Keyword(s):  
Identification Key ◽  
Northeastern Brazil ◽  
Similar Species

Hydrometra sapiranga sp. nov. is described, illustrated, and compared with similar species. An identification key to the species of Hydrometra recorded fromBrazil is also presented.

Bromeliaceae from Rio Grande do Norte State, Northeastern Brazil

Phytotaxa ◽  
2019 ◽  
Vol 422 (2) ◽  
pp. 113-143
Author(s):  
EDUARDO CALISTO TOMAZ ◽  
LEONARDO M. VERSIEUX
Keyword(s):  
Atlantic Forest ◽  
Morphological Variation ◽  
New Records ◽  
Rio Grande ◽  
The State ◽  
Additional Research ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Genus One

The Bromeliaceae Flora for the state of Rio Grande do Norte, Northeastern Brazil, is presented, based on extensive fieldwork, morphological analyses using herbarium and freshly collected material, and specialized literature. Twenty-six species of bromeliads were recorded in Rio Grande do Norte, distributed in ten genera and in three subfamilies. Bromelioideae was the richest subfamily (eight genera/14 species), followed by Tillandsioideae (one genus/12 species), and Pitcairnioideae (one genus/one species). Aechmea mertensii, Hohenbergia horrida and Tillandsia tenuifolia are new records for Rio Grande do Norte. Eight species (31%) are restricted to the Eastern portion of the state, in the Atlantic Forest. Caatinga dry woodlands harbor 18 species, with remarkable presence of Bromelia laciniosa, Encholirium spectabile, Tillandsia recurvata and T. streptocarpa, the four most widely distributed taxa. We discuss problems related to unclear taxonomic circumscriptions of species or diverging information between authors, more expressively in Hohenbergia, but also in Aechmea, Cryptanthus and Tillandsia. The data presented here might contribute to better understand the morphological variation of these taxa and suggest additional research on their taxonomy. Morphological descriptions, general comments, a map, photo plates and an identification key for all taxa are provided.

scholarly journals Anatomical Studies on Several Species of Heliotropium L. in Iran

2011 ◽  
Vol 3 (4) ◽  
pp. 35-43 ◽  
Author(s):  
Maryam ABBASI ◽  
Farideh ATTAR ◽  
Farrokh GHAHREMANI NEJAD
Keyword(s):  
Endemic Species ◽  
Arid Regions ◽  
Vascular Bundles ◽  
Anatomical Studies ◽  
Blade Number ◽  
Centre Of Origin ◽  
Adaptive Value ◽  
Anatomical Characters ◽  
Warm Temperate ◽  
Independent Species

Heliotropium spp. is distributed worldwide mainly in tropical and subtropical regions, with dry and warm temperate to semi-arid regions so that Southwest and center of Asia have considered as the main centre of origin and diversity of Heliotropium genus. Iran, with 32 species and 14 (sub) endemic species, has the highest diversity in the world followed by Pakistan and Turkey with 15 species and only one endemic species and the Arabian Peninsula with 15 species and three endemic species are in the next ranks. In order to anatomical studies on Heliotropium, twelve species of this genus were selected from different regions of Iran. The selected species included: H. bacciferum Forssk., H. ramossisimum BGE., H. brevilimb Boiss., H. transoxanum BGE., H. dasycarpum Ledeb, H. dyginum Forssk., H. aucheri Dc., H. carmanicum BGE. As perennial group and H. ellipticum Ledeb., H. lasiocarpum Fisch., H. suaveolens M.B. as annual group. In order to add more data to leaf anatomy characters, evaluating of systematic relevance and/or adaptive value of the morphological and anatomical diversity we have studied 24 anatomical characters in theses 12 species. For example shape and vascular bundles of main midrib, type of parenchyma cells located under lower epidermis of midrib, distance between vascular bundles and lower or upper epidermis, angle of between two parts of blade, number of cellular layers in lower or upper mesophylla, length of upper and lower mesophylla, type of cell wall in lower and upper mesophylla and thickness of lamina were investigated in this study. In order to this present obtained H. aucheri can be separated from H. carmanicum in H. aucheri subsp. carmanicum. It can be conclude that two species H. aucheri and H. carmanicum are independent species and can accept H. transoxanum as a sub group of H. dasycarpum.

A New Species of Araeococcus (Bromeliaceae) from Bahia, Brazil and a Comparative Morphological and Anatomical Analysis

2019 ◽  
Vol 44 (4) ◽  
pp. 790-797
Author(s):  
Ricardo A. S. de Pontes ◽  
Sandra Santa-Rosa ◽  
Adriana Pinheiro Martinelli ◽  
Leonardo M. Versieux
Keyword(s):  
New Species ◽  
Conservation Status ◽  
Seed Morphology ◽  
Northeastern Brazil ◽  
Anatomical Analysis ◽  
Type Population ◽  
Anatomical Characters ◽  
Floral Bracts ◽  
Unprotected Area ◽  
A New Species

Abstract—Araeococcus lageniformis is a new species described and illustrated here based on collections from the Atlantic Forest from the south of Bahia State, northeastern Brazil, and on morphological and anatomical characters. It is distinguished from A. nigropurpureus by the diameter of the tank, the morphology of the leaf, floral bracts, and sepals, by its sessile to nearly sessile flowers, its seed morphology, and by the presence of trichomes on both sides of the leaves. So far, the species is only known from Apuarema and Ibirapitanga municipalities. The type population was found in an unprotected area, fragmented by tracks and roads, where illegal logging takes place. Here we preliminarily assessed its conservation status as critically endangered.

Description of Pseudosteineria longisetis sp. n. from northeastern Brazil with a review of the genus Pseudosteineria Wieser, 1956 (Nematoda: Xyalidae)

Zootaxa ◽  
2020 ◽  
Vol 4763 (3) ◽  
pp. 354-370
Author(s):  
GABRIEL CIDREIRA ◽  
VIRÁG VENEKEY ◽  
ORANE F. DE SOUZA ALVES ◽  
FRANCISCO KELMO
Keyword(s):  
The Body ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Marine Nematode ◽  
Free Living ◽  
The Family ◽  
Emended Diagnosis

A new free-living marine nematode of the family Xyalidae is described from Armação Beach, northeastern Brazil, and the genus Pseudosteineria is reviewed. Pseudosteineria longisetis sp. n. is characterized by having six groups of long subcephalic setae, amphids situated slightly anterior to the groups of subcephalic setae or at the level of the first subcephalic setae, long somatic setae located posteriorly to subcephalic setae and distributed along the body, one papiliform precloacal supplement, and gubernaculum with dorso-caudal apophysis. An emended diagnosis of the genus, an updated list of species and dichotomous identification key, and a pictorial key are given. A comparative table including the main characters of all Pseudosteineria species is also provided. 

Evaluation of morphological and anatomical characters for discrimination and verification of some Medicago sativa (L.) Cultivars

2016 ◽  
Vol 50 (2) ◽  
Author(s):  
Mohamed M. Moawed
Keyword(s):  
Medicago Sativa ◽  
Seed Coat ◽  
Anatomical Variation ◽  
Morphological Characters ◽  
Vascular Bundles ◽  
Surface Patterns ◽  
Anatomical Characters ◽  
Periclinal Walls ◽  
Seed Coat Morphology ◽  
Morphological And Anatomical Variation

<italic>Medicago sativa</italic> L. (alfalfa) is one of the most important legume forages in the world. The objective of this study was to characterize and discriminate among 15 alfalfa cultivars with a different geographical origin. Macro-morphological and anatomical characters as well as seed coat sculpture were investigated. Twenty five morphological characters were extracted directly from the fresh specimens. Transverse section in the main stem were carried out; stained and seventeen anatomical characters were examined by light microscope. Seed coat surface was investigated using Scanning Electron Microscope (SEM). Data obtained were coded and analysed using NTsys-Pc software (Version 2.02) and the resulted dendrogram is discussed. The results showed morphological and anatomical variation between the studied taxa. Vascular bundles ranged from 16 to 23. The Egyptian cultivar Nubaria has the lowest number of vessels (16) while the American Super supreme has the larger number (23). The seed coat ornamentation revealed five main surface patterns and suggests the presence of variations in anticlinal boundaries and periclinal walls that provide stable diagnostic characters for morphologically closely related taxa. The dendrogram showed that the Egyptian cultivar Nubaria was the most distant and clustered separately from all the other alfalfa cultivars which were grouped into two main clusters. Seed coat morphology and combination of other plant morphological and anatomical characters permitted identification and discrimination between the examined cultivars. Results obtained in this work could be considered for further breeding strategies and studies.

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