scholarly journals Note on the seed morphology of Entada polyphylla (Leguminosae, Mimosoideae) and its taxonomic significance in E. sect. Entadopsis

2020 ◽  
Vol 9 (01) ◽  
pp. 08-11
Author(s):  
Rodrigo Rodrigues
Keyword(s):  
Seed Morphology ◽  
Taxonomic Significance

Nota sobre a morfologia da semente de Entada polyphylla (Leguminosae, Mimosoideae) e sua significância taxonômica em E. sect. Entadopsis. Entada sect. Entadopsis (Leguminosae, Mimosoideae) abrange três espécies neotropicais, E. polyphylla, E. polystachya e E. simplicata. Esta nota descreve e ilustra a morfologia da semente de Entada polyphylla, procurando avaliar sua relevância taxonômica em E. sect. Entadopsis. Os resultados demonstram que as sementes são variáveis na seção, fornecendo ca- racteres taxonômicos úteis em nível específico. As sementes de Entada polyphylla podem ser distintas daquelas de E. polystachya e E. simplicata especialmente pelos caracteres do embrião.  

scholarly journals THE HEDYOTIS–OLDENLANDIA–KOHAUTIA COMPLEX (RUBIACEAE) IN NEPAL: A STUDY OF FRUIT, SEED AND POLLEN CHARACTERS AND THEIR TAXONOMIC SIGNIFICANCE

2009 ◽  
Vol 66 (3) ◽  
pp. 371-390 ◽  
Author(s):  
S. Neupane ◽  
S. Dessein ◽  
T. J. Motley
Keyword(s):  
Pollen Grains ◽  
Seed Morphology ◽  
Marked Variation ◽  
Taxonomic Significance ◽  
Pollen Characters ◽  
Electron And Light Microscopy ◽  
Seed Characters ◽  
Fruit Dehiscence ◽  
Natural Groups ◽  
Scanning Electron

Pollen and seed characters of 12 Nepalese representatives of the Hedyotis–Oldenlandia–Kohautia complex (Spermacoceae s.l.; Rubiaceae) were investigated morphologically using scanning electron and light microscopy. The members of the complex were found to show remarkable variation in fruit, seed and pollen features. Pollen grains were all colporate with the aperture number varying from 3–4 to occasionally 5. The ectoaperture was a colpus, and the endoaperture was an endocingulum, a lalongate endocolpus or an endocolpus combined with an annulus around the mesoporus. Sexine ornamentation was variable, being perforate, reticulate or microreticulate. Three species were found to have a double reticulum. Supratectal elements were generally absent, but sometimes muri were beset with granules. Seeds were numerous per capsule, small and non-crateriform. Three types of seed were distinguished based on shape: (1) lenticular with a narrow wing-like margin, (2) trigonous, and (3) globose/subglobose. Trigonous seeds exhibited marked variation in colour, size and shape. On the basis of the pollen and seed characters, used in combination with the type of fruit dehiscence, five natural groups are identified for Nepalese taxa. The generic status of Hedyotis, Oldenlandia and Kohautia is maintained but some species are transferred from Hedyotis to Oldenlandia. Pollen and seed morphology, together with the type of fruit dehiscence, proved to be helpful in delimiting supra- and infrageneric groups within the Hedyotis–Oldenlandia–Kohautia complex.

scholarly journals The taxonomic significance of seed morphology in the Passiflora subgenus Astrophea (Passifloraceae)

2017 ◽  
Vol 31 (1) ◽  
pp. 68-83 ◽  
Author(s):  
Ana Carolina Mezzonato-Pires ◽  
Cláudia Barbieri Ferreira Mendonça ◽  
Michaele Alvim Milward-De-Azevedo ◽  
Vania Gonçalves-Esteves
Keyword(s):  
Seed Morphology ◽  
Taxonomic Significance

Seed morphology in the genus Fritillaria (Liliaceae) from Greece and its taxonomic significance

Phytotaxa ◽  
2019 ◽  
Vol 416 (4) ◽  
pp. 223-237
Author(s):  
SOFIA SAMAROPOULOU ◽  
PEPY BAREKA ◽  
DIMITRIS L. BOURANIS ◽  
GEORGIA KAMARI
Keyword(s):  
Multivariate Analysis ◽  
Seed Morphology ◽  
The Other ◽  
Morphological Parameters ◽  
Morphometric Data ◽  
Taxonomic Significance ◽  
First Report ◽  
Taxonomic Relationships ◽  
Other Hand ◽  
Taxonomic Importance

The genus Fritillaria is represented in Greece by 31 taxa, more than a half of which are endemic to the country. This is the first report studying the seed morphology of this genus in Greece, in an attempt to prove its taxonomic importance. Seeds from 59 Greek populations, representing 25 taxa have been studied concerning 11 morphological parameters. All examined taxa have numerous seeds per capsule that are flat and characterised by the presence of a peripheral wing. Their shape is ovate to widely ovate-triangular, with the exception of F. epirotica which is more hemispherical. The smallest seeds of all studied taxa belong to F. montana. The morphometric data, along with the multivariate analysis (PCA) and paired t-tests, can lead to interesting conclusions concerning the taxonomic relationships among several taxa. For example, taxa currently considered as synonyms, like F. sporadum within F. ehrhartii and F. theophrastii within F. pontica are found statistically different concerning seed morphology. On the other hand, taxonomically well distinct taxa, such as F. ionica subsp. thessala, F. graeca, and F. messanensis subsp. gracilis, share similar seed morphology. Finally, the two—very similar—subspecies of Fritillaria obliqua share the same seed features, rising again questions upon their taxonomic distinctiveness.

scholarly journals Morphological and anatomical features of seeds of Turkish Romulea taxa (Iridaceae) and their taxonomic significance

2015 ◽  
Vol 74 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Mehmet Cengiz Karaismailoğlu
Keyword(s):  
Morphological Characteristics ◽  
Principal Component ◽  
Seed Morphology ◽  
Taxonomic Significance ◽  
Anatomical Features ◽  
Taxonomic Importance ◽  
Anatomical Characters ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes ◽  
Scanning Electron

Abstract This paper reports on the assessment of morphological (macro and micro) and anatomical characters of seeds of Romulea taxa distributed in Turkey with the use of oneway analysis of variance, cluster analysis and principal component analysis. Morphological characteristics such as size, shape, color and surface of seeds were examined with the use of light and scanning electron microscopes. Thicknesses of testa and phytomelan layer, sizes of embryo in seeds were studied anatomically. The outcomes revealed that taxa were similar in some aspects such as color and shape of seeds. However, seed size, thickness of testa and phytomelan layer, shape of the epidermal cells in testa and sizes of embryo were different among taxa, and have taxonomic value in the distinction of these taxa from each other. In addition, the seed surfaces were more or less different for the examined taxa on an interspecific level. Consequently, seed morphology and anatomy with a few exceptions demonstrated diversity and they had taxonomic importance in terms of distinguishing among species.

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