scholarly journals A small-flowered natural Odontoglossum hybrid (Orchidaceae: Oncidiinae) from Ecuador

Lankesteriana ◽  
2019 ◽  
Author(s):  
Stig Dalström ◽  
Wesley E. Higgins
Keyword(s):  
Key Words ◽  
Line Drawing ◽  
Taxonomic Status ◽  
Parent Species ◽  
Natural Hybrid

A new small-flowered natural Odontoglossum hybrid from northwestern Ecuador is described and illustrated with a line drawing and a photograph. The novelty is compared with its sympatric parent species, Odontoglossum armatum and O. mirandum. The flower of the new natural hybrid has shorter erect lateral lip-lobes compared to those for O. mirandum, but distinctly longer erect lateral lip-lobes compared to those for O. armatum, which are basically lacking altogether. The taxonomic status of the variable O. mirandum is briefly discussed. Key words: Ecuador, new hybrid, Odontoglossum, Orchidaceae, Oncidiinae

Catasetum × sheyllae (Orchidaceae: Catasetinae), a new natural hybrid from Brazilian Amazon

Phytotaxa ◽  
2021 ◽  
Vol 527 (4) ◽  
pp. 257-265
Author(s):  
PATRICK DE CASTRO CANTUÁRIA ◽  
DAYSE RAIANE PASSOS KRAHL ◽  
AMAURI HERBERT KRAHL ◽  
GUY CHIRON ◽  
João Batista Fernandes Da Silva ◽  
...  
Keyword(s):  
Field Study ◽  
Brazilian Amazon ◽  
Morphological Features ◽  
Natural Hybridization ◽  
Parent Species ◽  
Natural Hybrid ◽  
Putative Parent

Natural hybridization has often been recorded within certain genera of orchids, one of them is Catasetum. During a field study in a forest de igapó in Brazilian Amazon, a new natural hybrid was found, it is here described as Catasetum × sheyllae. Its morphological features, mainly the structures of the lip, are intermediate between those of its putative parent species, C. boyi and C. garnettianum, both observed in sympatry.

scholarly journals Taxonomy of the genus Commelina Plum. ex L. (Commelinaceae) in Nepal

2010 ◽  
Vol 6 ◽  
pp. 25-31 ◽  
Author(s):  
Jyoti P Gajurel ◽  
Krishna K Shrestha
Keyword(s):  
Key Words ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Species Level ◽  
Morphological Data ◽  
Plant Science ◽  
The World ◽  
Voucher Specimens ◽  
Key Words Anatomy ◽  
Anatomical Characters

About 170 species of Commelina are known from tropical and subtropical regions of the world. Nepal contributes 6 species of Commelina to the world flora. In the present work, taxonomy of all the six species of Commelina reported from Nepal (C. benghalensis, C. caroliniana, C. diffusa, C. maculata, C. paludosa and C. suffruticosa) was studied. Voucher specimens were collected from Central and Eastern Nepal, covering 14 districts. Morphological characters were studied from these collections. Palynological and anatomical characters were also used to see if they are taxonomically important to delimit the taxa within Commelina. Morphological characters seemed promising to delimit the taxa within Commelina. The key identifying characters at species level are modification in root, form of spathe, structure of leaves and seeds, shape of stomata and pollen. Palynological and anatomical characters were also useful, to some extent, in separating some species, but were not significant as compared to morphological data. Some specimens, close to C. benghalensis and C. caroliniana, showed very different characters. Thus further study is needed to confirm their taxonomic status. Key-words: anatomy; flora; morphological characters; palynology; voucher specimens.DOI: 10.3126/botor.v6i0.2907 Botanica Orientalis - Journal of Plant Science (2009) 6: 25-31

Extraction of Junctions, Lines and Regions of Irregular Line Drawing: The Chain Code Processing Algorithm

2012 ◽  
Author(s):  
Habibollah Haron ◽  
Dzulkifli Mohamed ◽  
Siti Mariyam Hj. Shamsuddin
Keyword(s):  
Feature Extraction ◽  
Key Words ◽  
Line Drawing ◽  
Engineering Product ◽  
Chain Code ◽  
Thinning Algorithm ◽  
Test Input ◽  
Code Algorithm ◽  
Regular Line ◽  
Thinning Process

Peringkat konsepsualisasi dalam kitar hayat reka bentuk produk kejuruteraan merupakan proses menterjemahkan idea jurutera ke atas sehelai kertas. Menggunakan sebatang pensil dan sehelai kertas, bentuk produk yang diinginkan akan dilakar. Lakaran seterusnya akan dikemaskinikan dengan menambah dimensi yang lebih tepat beserta pandangan-pandangan tambahan bagi menunjukkan kawasan terlindung. Kertas kerja ini membincangkan proses-proses yang terlibat dalam menterjemahkan lakaran berupa lukisan garisan tak sekata kepada lukisan sekata yang kemas. Proses ini juga turut menghasilkan tiga entiti penting iaitu simpang, garisan dan kawasan. Algoritma kod rantaian digunakan bagi mendapatkan entiti ini. Kertas kerja ini juga menerangkan proses penipisan yang terlibat sebelum algoritma kod rantaian dilaksanakan. Andaian-andaian, beberapa definisi penting dan kaedah memindahturun fail imej juga dipersembahkan. Kertas kerja ini diakhiri dengan beberapa lakaran input, kesimpulan dan cadangan pembaikan. Kata kunci: Terjemahan lukisan garisan; kod rantaian; pengestrakkan ciri; algoritma penipisan Conceptualization stage in designing engineering product is a process of translating engineer´s idea onto a sheet of paper. The product is always sketched on a sheet of paper using pencil. The sketch is tidied up by adding accurate dimension, and complete view of hidden part. This paper discusses part of the process involved in translating the sketch or irregular line drawing into a tidy or regular line drawing, that yield three important entities namely junction, line and region. The chain code algorithm is used to find these entities. The paper also explains explicit thinning process involved before the chain code methodology. Assumptions, important definitions and method of loading image file are also presented. The paper is concluded with several test input sketches, conclusion and future works. Key words: Line drawing; interpretation; chain code; feature extraction; thinning algorithm

scholarly journals Karyotype analysis with orcein and CMA in two species of Alocasia (Schott) G. Don (Araceae)

1970 ◽  
Vol 40 (1) ◽  
pp. 53-56 ◽  
Author(s):  
Syeda Sharmeen Sultana ◽  
Hosne Ara ◽  
Sheikh Shamimul Alam
Keyword(s):  
Chromosome Number ◽  
Key Words ◽  
Karyotype Analysis ◽  
Chromosome Complement ◽  
Taxonomic Status ◽  
The Other ◽  
First Report ◽  
Total Length ◽  
Internet Information ◽  
Chromosomal Length

Alocasia fallax Schott and A. odora (Roxb.) Koch (Araceae) were investigated cytogenetically to confirm their taxonomic status. There is no report of 2n chromosome number for A. fallax in the available literature and internet information. Therefore the 2n chromosome number (2n = 28) found in this study is probably the first report for A. fallax. Alocasia odora showed exactly double 2n chromosome number (2n = 56) from A. fallax. In addition to chromosome number, the other karyotypic features of A. odora were exactly double for that of A. fallax. The centromeric formulae of A. fallax was 24 m + 4 sm whereas it is just double in A. odora. Total length of 2n chromosome complement of A. odora (62.58 μm) was almost double to A. fallax. The range of chromosomal length of the two species was almost same. Moreover, A. odora plant is much taller than A. fallax. All of these data suggests that A. odora might be an autotetraploid of A. fallax which in course of evolution had undergone some changes in GC-rich repeats. Key words: Alocasia; CMA; Karyotype analysis DOI: http://dx.doi.org/10.3329/bjb.v40i1.7998 Bangladesh J. Bot. 40(1): 53-56, 2011 (June)

scholarly journals A new small-flowered Cyrtochilum species (Orchidaceae: Oncidiinae) from the Condor mountains in Ecuador

Lankesteriana ◽  
2020 ◽  
Author(s):  
Stig Dalström ◽  
Wesley Higgins
Keyword(s):  
New Species ◽  
Key Words ◽  
Line Drawing ◽  
Morphological Features

A new small-flowered species of Cyrtochilum  from  the  isolated  range  of  the  Condor  mountains   in   Ecuador   is   described   and   illustrated   with   a   line   drawing   and   a   photograph   of   the   holotype.   It   shares   morphological  features  with  several  different-­looking  groups  of  Cyrtochilum,  such  as  the  two  generitypes  of   the  genus:  C.  undulatum  and C. flexuosum,  as  well  as  with  plants  in  the  C.  myanthum  complex.  These  groups   are   treated   as   three   separate   genera   by   some   (Cyrtochilum,   Trigonochilum   and  Dasyglossum, respectively),   but  the  combination  of  morphological  features  seen  in  our  new  species  brings  the  groups  together  into  one   polymorphic  but  genetically  monophyletic  genus. Key words:  Condor,  Cyrtochilum,  new  species,  Oncidiinae

Sorting out the muddle: taxonomy and nomenclature of Thymus ×porcii (Lamiaceae) and related nothotaxa, with comments on parent species delimitation

Phytotaxa ◽  
2021 ◽  
Vol 501 (1) ◽  
pp. 119-139
Author(s):  
VIKTOR O. NACHYCHKO ◽  
YEVHEN V. SOSNOVSKY
Keyword(s):  
Species Delimitation ◽  
Parental Species ◽  
Molecular Data ◽  
Forest Steppe ◽  
Original Material ◽  
Parent Species ◽  
Natural Hybrid ◽  
Separate Species ◽  
Diagnostic Traits

Thymus ×porcii is a natural hybrid between T. pannonicus and T. pulegioides, occurring within the co-occurrence range of its parental species in the forest and forest-steppe zones of Europe. Taxonomy and nomenclature of this hybrid present a longstanding puzzle due to the lack of critical evaluations of the original material as well as conflicting taxonomic interpretations of the parent taxa both at specific and intraspecific levels. The present paper attempts to clarify these issues, arguing against the synonymic treatment and/or consolidation of T. pannonicus and T. pulegioides, which is accepted in modern taxonomies apparently as a result of nomenclatural confusion related to T. pannonicus typification. Based on morphology and reported molecular data, it is proposed to treat T. pannonicus and T. pulegioides as separate species, each containing two varieties being well-distinguished by the presence or absence of leaf indumentum: T. pannonicus var. latifolius (glabrous leaves) and T. pannonicus var. pannonicus (pubescent leaves), and T. pulegioides var. pulegioides (glabrous leaves) and T. pulegioides var. vestitus (pubescent leaves). In view of such treatment, T. ×porcii is divided into three nothovarieties, representing natural crosses between different varieties of the parent species. Namely, in addition to the typical T. ×porcii nothovar. porcii [T. pannonicus var. latifolius × T. pulegioides var. pulegioides] (with T. ×pilisiensis and T. ×goginae as the taxonomic synonyms), we describe a new nothovariety T. ×porcii nothovar. calvariensis [T. pannonicus var. pannonicus × T. pulegioides var. pulegioides], and propose a new nomenclatural combination T. ×porcii nothovar. opizii [T. pannonicus × T. pulegioides var. vestitus] based on the previously published name T. ×opizii. On the basis of original material examination, two collections from BP are designated here as the lectotypes of T. ×porcii (≡ T. ×porcii nothovar. porcii) and T. ×pilisiensis respectively, and one specimen from PR is designated as the lectotype of T. ×opizii (≡ T. ×porcii nothovar. opizii). Main diagnostic traits of T. ×porcii nothovarieties and their parental taxa are compared and discussed.

scholarly journals In-depth investigation of the species problem and taxonomic status of marbled crayfish, the first asexual decapod crustacean

2018 ◽  
Author(s):  
Günter Vogt ◽  
Nathan J. Dorn ◽  
Michael Pfeiffer ◽  
Chris Lukhaup ◽  
Bronwyn W. Williams ◽  
...  
Keyword(s):  
Meta Analysis ◽  
Decapod Crustacean ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Published Data ◽  
Parent Species ◽  
Natural Habitats ◽  
Separate Species ◽  
Procambarus Fallax ◽  
Marbled Crayfish

ABSTRACTThe marbled crayfish is the only obligately parthenogenetic decapod crustacean and a novel research model and invasive animal on three continents. It is regarded either as a parthenogenetic form of slough crayfish Procambarus fallax or as a separate species named Procambarus virginalis. In order to investigate the species question of this unusual crayfish in detail we have identified the similarities and differences in morphology, life history, genetics, behaviour, ecology and biogeography between marbled crayfish and its most likely parent species P. fallax. We have investigated specimens from natural habitats, laboratory colonies and museum collections and performed a meta-analysis of our data and published data. Our COI based molecular tree with 27 Cambaridae confirms closest relationship of marbled crayfish with P. fallax. Marbled crayfish and P. fallax are similar with respect to morphological characters, coloration and body proportions, but differ considerably with respect to body size, fertility and longevity. The mitochondrial genes of both crayfish are similar, but ploidy level and haploid genome size are markedly different. Both crayfish are eurytopic and have two major annual recruitment periods, but marbled crayfish show different population structure and higher invasiveness. Marbled crayfish occur in tropical to cold temperate habitats of the old world, but P. fallax is confined to subtropical and warm-temperate habitats of the southeastern USA. Cross-breeding experiments with both crayfish revealed reproductive isolation. The application of the Evolutionary Genetic Species Concept for asexuals to all available data supports raising marbled crayfish from “forma” to species rank. A determination key is provided to discriminate Procambarus virginalis, the first asexual decapod species, from its parent species P. fallax.

scholarly journals A new yellow-flowered Chiloschista (Orchidaceae: Aeridinae) from Thailand

Lankesteriana ◽  
2020 ◽  
pp. 241-248
Author(s):  
Stig Dalström ◽  
Marta Kolanowska
Keyword(s):  
New Species ◽  
Key Words ◽  
Line Drawing ◽  
Distinguishing Features ◽  
A New Species

A new species of Chiloschista Lindl. from western Thailand is described and illustrated with a line drawing and photographs. It is compared with the sympatric C. parishii Seidenf., from which it differs in having larger flowers, which are 11–12 mm across versus 8–10 mm across for C. parishii. The new species also distinctly differs in having widely spreading rostellum lobes and a viscidium that is as broad as the length of the stipe, as opposed to downward directed rostellum lobes and a viscidium that is distinctly narrower than the length of the stipe for C. parishii. The same distinguishing features separate the new species from the similarly colored C. trudelii Seidenf., which has inward-directed rostellum lobes and a viscidium that is distinctly narrower than the length of the stipe. Key words: Epidendroideae, new Chiloschista, Thailand orchid flora, Vandeae

scholarly journals LEAF ANATOMICAL COMPARISON BETWEEN NATURAL HYBRID NEPENTHES AMPULLARIA JACK × NEPENTHES MIRABILIS (LOUR.) DRUCE WITH THE PARENTAL SPECIES IN KERINCI, JAMBI

Floribunda ◽  
2020 ◽  
Vol 6 (4) ◽  
Author(s):  
Dee Dee Al Farishy ◽  
Nisyawati ◽  
Destario Metusala
Keyword(s):  
Principal Component Analysis ◽  
Parental Species ◽  
Principal Component ◽  
Component Analysis ◽  
Observation Data ◽  
Parent Species ◽  
Natural Hybrid ◽  
Parametric Test ◽  
Organ Sample ◽  
Two Hybrid

Dee Dee Al Farishy, Nisyawati, Destario Metusala. 2020. Perbandingan Anatomi Hibrid Alam Daun Nepenthes ampullaria Jack x Nepenthes mirabilis (Lour.) Druce dengan Spesies Induk di Kerinci, Jambi. Floribunda 6(4): 141–153. — Nepenthes merupakan tanaman berumah dua yang dapat memproduksi persilangan alami, termasuk N. ampullaria  dan  N. mirabilis. Persilangan tersebut kurang lebih berbagi karakter atau peralihan antara kedua spesies parental. Objektif penelitian adalah untuk menganalisis ke-samaan karakter taksa persilangan tersebut berdasarkan organ daun dasar. Sampel dikoleksi dari Danau Lingkat, Kerinci, Jambi. Data observasi diukur secara kualitatif, kuantitatif menggunakan SPSS 22 dengan tes parametrik, dan non-parametrik, serta Analisis Komponen Utama (AKU) dari 27 karakter. Secara kualitas, terdapat dua karakter persilangan yang berupa peralihan. Secara kuantitas, terdapat pula 14 karakter yang tidak berbeda signifkan, 1 karakter serupa N. ampullaria, 4 karakter serupa N. mirabilis, 1 karakter peralihan, dan 3 karakter berbeda dengan kedua parental. Dee Dee Al Farishy, Nisyawati, Destario Metusala. 2020. Leaf Anatomical Comparison Between Natural Hybrid Nepenthes ampullaria Jack × Nepenthes mirabilis (Lour.) Druce with the Parental Species in Kerinci, Jambi. Floribunda 6(4): 141–153. — Nepenthes are dioceous plant that could produce natural hybrid, including N. ampullaria and N. mirabilis. The hybrid more or less have intermediate or sharing character between two parent species. The objective of the research were to analyze character similarity acccording to basic leaves organ. Sample collected from Lingkat Lake, Kerinci, Jambi. Observation data were measured qualitatively, quantitatively using SPSS 22 with parametric test, non-parametric test, and Principal Component Analysis (PCA) from 27 characters. Qualitatively, there are two hybrid characters that inter-mediate. Quantitatively, there are 14 characters are not significantly different, 1 character similar to N. ampullaria, 4 characters similar to N. mirabilis, 1 character intermediate, and 3 characters are different with two parent.  

scholarly journals A NEW GOLDEN YELLOW SMALL-FLOWERED CYRTOCHILUM SPECIES (ORCHIDACEAE: ONCIDIINAE) FROM PERU

Lankesteriana ◽  
2020 ◽  
Author(s):  
Stig Dalström ◽  
Delsy Trujillo
Keyword(s):  
New Species ◽  
Key Words ◽  
Line Drawing ◽  
Similar Species ◽  
Yellow Color ◽  
Golden Yellow

A new golden yellow small-flowered species of Cyrtochilum is described and illustrated with a line drawing and photographs. It is compared with superficially similar species in the C. aureum complex, in which the new species differs by the lack of lacerate column wings typical for that group. It is distinguished from all other known small-flowered Cyrtochilum species by the golden yellow color in combination with the distinctly pandurate lip lamina where the front lobe is wider than the basal lobes combined. Key Words: Ancash, Cyrtochilum, new species, Oncidiinae, Peru

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