Abstract
The epidermal characters of leaves and anatomical characters of petioles and young stems of some members of the genus Chrysophyllum, viz. C. albidum, C. perpulchrum, C. cainito, and C. delevoyi were analyzed to determine their diagnostic features. Paracytic stomata, crystal sand, prismatic crystals, secretory canals occurred in all the species. All the species are hypostomatic except C. perpulchrum. The midribs of all species have an open semi-circular vascular system except in C. cainito with a closed system. Midrib and petiole of C. albidum and C. cainito have non-glandular T-shaped trichomes. Accessory bundles are only seen in the petioles of C. delevoyi, and in the midribs of C. albidum and C. cainito. The midrib and petiole of C. delevoyi and C. albidum have a central bundle. Laticifers, prismatic and sand crystals occur mainly in the cortical cells, pith cells, xylem, phloem, and mesophyll. Lamina of all species studied showed uniseriate epidermis except C. cainito which has two layers of the adaxial epidermis. The stomatal index, the ratio of the spongy to palisade mesophyll thickness, the ratio of cortex thickness, outline, number, and arrangement of the vascular bundles in the midrib, petiole, and young stem differ and are valuable diagnostic features in Chrysophyllum.
 Bangladesh J. Plant Taxon. 28(1): 217-231, 2021 (June)
Highlights
Sapotaceae is one of the large families of flowering plant and comprises about 60 genera and 1300 species (Pennington, 1991; Govaerts et al, 2001), 60–70 species of which are native to tropical and subtropical regions of the world, especially America, West Africa, and Australia (Shailajan and Gurjar, 2014)
In Africa, there are approximately 51 species under 23 genera (Hutchinson and Dalziel, 1954). 13 species are reported from West Africa and seven species from Nigeria (Hutchinson and Dalziel, 1954; Keay, 1989)
The identification of Chrysophyllum is weak and problematic (Prasawang and Srinual, 2020), because the available identification keys are based on leaf and floral characteristics (Chayamarit, 2014)
Summary
Sapotaceae is one of the large families of flowering plant and comprises about 60 genera and 1300 species (Pennington, 1991; Govaerts et al, 2001), 60–70 species of which are native to tropical and subtropical regions of the world, especially America, West Africa, and Australia (Shailajan and Gurjar, 2014). Several authors have reported that the members of this family are mainly lowland species, have wide morphological variations, and provide essential resources to native fauna and humans (Prasawang and Srinual, 2020; Felippi et al, 2008; Gomes et al, 2008; Reis et al, 2013) Members of this genus have many health benefits including antidiabetes, anti-inflammation, anticancer, antioxidant, antimicrobial, and rheumatoid arthritis properties (Koffi et al, 2009; Mallikarjun et al, 2011; Meira et al, 2014; Li et al, 2015; Mao et al, 2015; Hegde et al, 2016; Ningsih et al, 2016; Doan et al, 2018; George et al, 2018), cultural, and ethnobotanical uses (Inyama et al, 2016; Parker et al, 2010; Das et al, 2010). Don and C. subnudum Baker have made some scholars to consider C. subnudum as a variety of C. albidum (Prasawang and Srinual, 2020)
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