Epidermal Properties of Aloe vacillans Forsskal Leaf and Its Taxonomical Significance in Classifying its Two Forms

Author's: Hassan M. Ibrahim1*, Atheer Radman Alshaibani1, Abdul Nasser A. Al-Gifri2
Authors' Affiliations
1Biology Department, Faculty of Science, Sana'a University, P.O. Box 12231, Sana'a, Yemen.2Biology Department, Faculty of Education, Aden University, P.O. Box 6312, Khor Makssar, Aden,  Yemen.*CorrespondenceHassan M. IbrahimEmail:ibrahimflora@gmail.com
Article Type: Research Article     Published: Jul. 04, 2021 Pages: 76-83
DOI:        Views 626       Downloads 0


About 14 leaf epidermal characters (6 epidermal cell properties and 8 stomatal properties) of two forms (red-flowered and yellow-flowered forms) of Aloe vacillans Forsskal (Endemic Species to South West of Arabian Peninsula) were investigated. Only two epidermal cell properties and three stomatal properties show high significance in distinguishing between the two forms of A. vacillans. Moreover; 12 epidermal quantitative characters were subjected to numerical analysis (UPGMA), and the resulted dendrogram segregated the two examined forms at a relatively high similarity level (93.53%). This confirms that the two forms (red form and yellow form) of A. vacillans are two different infra-specific taxa under A. vacillans, which were described as A. audhalica Lavranos and Hardy and A. dhalensis Lavranos.


Aloe vacillans,

A. audhalica,

A. dhalensis,

Epidermal characters, Taxonomy.

Authors’ Contribution

HMI and ANAA designed the study. HMI and ARA performed the experiments. HMI analyzed data, wrote and revised the paper.

How to cite

Ibrahim, H.M., Alshaibani, A.R., Al-Gifri, A.N.A., 2021. Epidermal Properties of Aloe vacillans Forsskål Leaf and Its Taxonomical Significance in Classifying its Two Forms. PSM Biol. Res., 6(3): 76-83.