Stomata in Tradescantia zebrina (Commelinaceae)

Photo Google Wikimedia Commons
Tradescantia zebrina leaf viewed under microscope, the red epidermis contrasts with the underlying green tissue and allows for easy location and identification of the stomata.

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Author: Aiofthe Storm

19 March 2014 –1,280 × 1,024 (1.63 MB)


Stomata in Rhoeo discolor (Commelinaceae)

Photo credit: Google

Photo Google Wikimedia Commons – Rhoeo discolor is used in Mexico as a medicinal plant.
Rhoeodiscolor100x1.jpg –

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Source :

12 November 2014 –1,024 × 768 (166 KB)
Photo Google Wikimedia Commons –  –
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Soiurce :

Stomata in Tulipa (Liliaceae)

Phoro Google Wikimedia Commons – This image comes from the archive of Josef Reischig and is part of the 384 pictures kindly donated by the authorship heirs under CC BY SA 3.0 license as a part of Wikimedia Czech Republic‘s GLAM initiative. – Tulip leaf epidermis. – 3,749 × 2,399 (2.54 MB)

Optical microscopy technique:Differential interference contrast (Nomarski)

Magnification: 600x (for picture width 26 cm ~ A4 format).

11 March 2014 –3,751 × 2,401 (1.42 MB) – VicuñaUploader 1.20
Josef Reischig

Stomata in Lilium (Liliaceae)

Photo Google Wikimedia Commons – Photomicrograph of a Lilium leaf with stoma. A=Guard cell, B=Nucleus. Scale=0.1mm. – Source : Jon Houseman and Matthew Ford – 29 September 2014 – Author : Jon Houseman –Original file ‎(1,200 × 886 pixels, file size: 208 KB, MIME type: image/jpeg) – 1,200 × 886 (208 KB)

Stomata in Paspalum (Poaceae)

Paspalum sp. (Photo Wikipedia)

Dumbbell-shaped stomata on a leaf of Paspalum sp. Imagem obtained with the help of optical microscopy and dyes. – 21 April 2015 – Author: Karl Az. (Estomatos.jpg ‎(637 × 224 pixels, file size: 109 KB, MIME type: image/jpeg)) – This image was uploaded as part of Wiki Science Competition 2017.

Dumbbell-shaped stomata on a leaf of Paspalum sp. Imagem obtained with the help of optical microscopy and dyes. – 21 April 2015 – Author: Karl Az. 

Português: Estômato em formato de halteres em uma folha de Paspalum sp. Imagem obtida com a ajuda de microscopia óptica e corantes. – 21 April 2015 – Author: Karl Az. 

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Stomata in Allium (Amaryllidaceae)

Screen Shot 2018-10-16 at 09.39.11
Figs. 1-16. Characteristics of adaxial epidermal cells in Allium. Scale bar = 40 μm. 1. A. tuberosum, 2. A. ramosum, 3. A. oreoprasum, 4. A. lineare, 5. A. strictum, 6. A. flavidum, 7. A. przewalskianum, 8. A. tekesicola, 9. A. mongolicum, 10. A. caespitosum, 11. A. polyrhizum, 12. A. Bidentatum, 13. A. anisopodium, 14. A. weschniakowii, 15. A. senescens, 16. A. nutans


The taxonomic significance of leaf epidermal micromorphological characters in distinguishing 43 species of Allium L. (Amaryllidaceae) from central Asia

by Lin C.-Y., Tan D.-Y. (2015)

Chen-Yi LIN, 1,2 AND Dun-Yan TAN, 1*

1 Key Laboratory of Western Arid Region Grassland Resources and Ecology, Ministry of Education, China; Xinjiang Key Laboratory of Grassland Resources and Ecology; College of Pratacultural and Environmental Science, Xinjiang Agricultural University, Ürümqi 830052, China
2 College of Forestry and Horticulture, Xinjiang Agricultural University, Ürümqi 830052, China



in Pak. J. Bot. 47(5): 1979-1988 –


The genus Allium is comprised of more than 800 species, and although previous studies have been useful in identifying the species, there is a paucity of easy-to-observe morphological characters with which to distinguish them. Thus, we determined the micromorphological characteristics of the leaf epidermis of 43 species of Allium from Central Asia using light microscopy and evaluated their taxonomic significance.

Our study examined variability in epidermal cell shape and size and the stomatal apparatus.

The stomatal apparatus is ellipsoid, anomocytic and amphistomatic. The shape (rectangular or rhomboid) of epidermal cells, pattern (straight or arched) of anticlinal walls, and stomatal index are stable within a species, while there are differences among species that allow for species delimitation. Based on the shape and pattern of anticlinal walls of leaf epidermal cells, the 43 sampled species could be divided into three distinct types of epidermal cells: type 1, rhomboid cell shape and straight anticlinal walls; type 2, rhomboid cell shape and arched anticlinal walls; and type 3, rectangular cell shape and straight anticlinal walls.

These leaf epidermal micromorphological characters prove to be the taxonomic significance in distinguishing and delimitating species in Allium.