
Taxus umbraculifera (Umbrelliform yew)
Spjut R. W. (2010)
The World Botanical Associates, reformatted June 2010 – http://www.worldbotanical.com/Taxus_umbraculifera.htm

Spjut R. W. (2010)
The World Botanical Associates, reformatted June 2010 – http://www.worldbotanical.com/Taxus_umbraculifera.htm
Kim K., Whang S. S., Sun B.-Y. (1995)
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J. Plant Biol. 38(2): 181-193 –
https://www.koreascience.or.kr/article/JAKO199511920117719.pdf
Garcia Alvarez S., Garcia-Amorena I., Rubiales J. M., Morla C. (2009)
SALVIA GARCÍA ÁLVAREZ, IGNACIO GARCÍA-AMORENA, JUAN M. RUBIALES, CARLOS MORLA
Unidad Docente de Botánica, Escuela Técnica Superior de Ingenieros de Montes, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Botanical Journal of the Linnean Society 161: 436–448 –
https://oa.upm.es/5073/2/INVE_MEM_2009_64103.pdf –
This study reports the value of leaf cuticle characteristics in the identification and classification of Iberian Mediterranean species of the genus Pinus (P. nigra subsp. salzmannii, P. pinaster, P. pinea and P. halepensis), with the aim of using these characters to identify isolated cuticles and stomata in palynology slides.
Preparations were made of the cuticles of pine needles belonging to one natural Iberian population of each of the above species. A number of epidermal morphological characteristics were then recorded with the aim of distinguishing these species from one another.
The structure of the stomatal complex (the shape and arrangement of the subsidiary cells) was different in each species. The aperture of the epistomatal chamber was significantly smaller in P. pinea than in the other species examined, and the variables recorded for the thickening of the guard cells provided relationships that clearly distinguished all four taxa.
The width and length of the stomata and the upper woody lamellae, the central distance between the external limits of the medial lamellae borders and the length of the stem were the most useful variables in this respect.
The present results contribute to the ongoing discussion regarding the taxonomic classification of the members of Pinus, and provide valuable clues for the identification of Iberian Mediterranean pine species from small pine needle fragments or isolated stomata.
After validation of the present results for multiple populations, these results could also be used to help identify fossil leaf macroremains and the scattered/isolated stomata commonly observed in palaeopalynological samples.
Chiba S., Watanabe M. (xxxx) –
Shigeru CHIBA, Misao WATANABE,
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https://www.ffpri.affrc.go.jp/pubs/bulletin/051/documents/57-9.pdf
Ghimire B., Lee C., Yang J., Heo K. (2015)
Balkrishna Ghimire
Department of Applied Plant Science, Kangwon National University, Chuncheon 200-701, KoreaDivision of Plant Conservation, Korea National Arboretum, Pocheon 487-829, Korea
Chunghee Lee
Korea National Arboretum, Pocheon 487-829, Korea
Jongcheol Yang
Korea National Arboretum, Pocheon 487-829, Korea
Kweon Heo
Department of Applied Plant Science, Kangwon National University, Chuncheon 200-701, Korea
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Acta Bot. Bras. 29(3): – https://doi.org/10.1590/0102-33062014abb0009 –
https://www.scielo.br/j/abb/a/MjNwf9Bw3VW3jbzJxKVFgJt/?lang=en
ABSTRACT
A number of conifer species are still lacking anatomical data, which is significant because morphological and anatomical data are essential for systematic study.
Leaf anatomy was studied in selected species of Abies and Picea using light and scanning electron microscopy. Both genera were found to have typical coniferous and highly xerophytic leaves with sunken stomata and an epidermis covered by a thick cuticle.
In the genus Abies, species can be differentiated by the nature of the lignified hypodermis and the number and position of resin ducts. Abies firma and A. holophylla have a continuous hypodermis whereas in A. koreana and A. nephrolepis the hypodermis is discontinuous and represented by isolated cells or groups of four or five cells.
On the other hand, in Picea leaf shape, stomata arrangement, and number, position, and nature of resin ducts are the key features for species differentiation. Picea jezoensis has a flattened leaf with stomata distributed on the adaxial surface whereas P. abies and P. koraiensis have a rectangular leaf with stomata found on surfaces.
Ma Q.-W., Li C.-S. (2002)
Qing-Wen Ma, Cheng-Sen Li,
Taiwania 47(3): 194-202 –
https://taiwania.ntu.edu.tw/pdf/tai.2002.47.194.pdf
Finsinger W., Tinner W. (2020)
Walter Finsinger1, Willy Tinner2,
1 ISEM, Univ Montpellier, CNRS, EPHE, IRD, 34095 Montpellier, France
2 Oeschger Centre for Climate Change Research and Institute of Plant Sciences, University of Bern, Bern, Switzerland
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Vegetation History and Archaeobotany, Springer Verlag 29: 393-406 – 10.1007/s00334-019-00754-1 –
hal-02319673
https://hal.archives-ouvertes.fr/hal-02319673/document
Calamassi R. 1, Puglisi S. R. 2, Vendramin G. G. 2, (1988) – – Silvae Genetica 37: 5-6 –
https://www.thuenen.de/media/institute/fg/PDF/Silvae_Genetica/1988/Vol._37_Heft_5-6/37_5-6_199.pdf
Zobel D. B., Lin T.-P., Liu V. T. (1978)
Donald B. Zobel, Tsan-Piao Lin, Valiant T. Liu,
Taiwania 23: 1-6 – DOI: 10.6165/tai.1978.23.1 –
https://taiwania.ntu.edu.tw/pdf/tai.1978.23.1.pdf –
https://taiwania.ntu.edu.tw/abstract.php?type=abstract&id=594
Coiro M., Lumaga B., Rosaria M., Rudall P. J. (2021 )
Coiro Mario, Barone Lumaga, Maria Rosaria, Rudall Paula J.,
Annals of Botany XX: 1–12 – https://doi.org/10.1093/aob/mcab095 –
https://www.zora.uzh.ch/id/eprint/205151/13/mcab095%281%29.pdf
Abstract: (Sent by Submission form by Mario COIRO)
Background and Aims
The gymnosperm order Cycadales is pivotal to our understanding of seed-plant phylogeny because of its phylogenetic placement close to the root node of extant spermatophytes and its combination of both derived and plesiomorphic character states. Although widely considered a ‘living fossil’ group, extant cycads display a high degree of morphological and anatomical variation. We investigate stomatal development in Zamiaceae to evaluate variation within the order and homologies between cycads and other seed plants.
Methods
Leaflets of seven species across five genera representing all major clades of Zamiaceae were examined at various stages of development using light microscopy and confocal microscopy.
Key Results
All genera examined have lateral subsidiary cells of perigenous origin that differ from other pavement cells in mature leaflets and could have a role in stomatal physiology. Early epidermal patterning in a ‘quartet’ arrangement occurs in Ceratozamia, Zamia and Stangeria. Distal encircling cells, which are sclerified at maturity, are present in all genera except Bowenia, which shows relatively rapid elongation and differentiation of the pavement cells during leaflet development.
Conclusions
Stomatal structure and development in Zamiaceae highlights some traits that are plesiomorphic in seed plants, including the presence of perigenous encircling subsidiary cells, and reveals a clear difference between the developmental trajectories of cycads and Bennettitales. Our study also shows an unexpected degree of variation among subclades in the family, potentially linked to differences in leaflet development and suggesting convergent evolution in cycads.
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