Anatomy of Goniocaulon indicum (J. G. Klein ex Willd.) C. B. Clarke: A Promising Wild Leafy Vegetable from Family Asteraceae

Abstract

Goniocaulon indicum (J. G. Klein ex Willd.) C. B. Clarke, a prominent wild leafy vegetable of the family
Asteraceae, is traditionally utilized as a food resource in parts of Nanded District. The present study was
undertaken to characterize the anatomy of the root, stem and leaf to establish diagnostic features useful for
botanical identification and pharmacognostic standardization. The root exhibited prominent secondary
growth, with a distinct outer protective region, narrow parenchymatous cortex, secondary phloem, vascular
cambium and extensive secondary xylem containing numerous circular to oval vessel lumina, xylem fibers
and parenchyma. The centrally positioned primary xylem was comparatively inconspicuous and exhibited an
exarch arrangement. The stem showed a single-layered epidermis, broad parenchymatous cortex, numerous
collateral, conjoint and open vascular bundles arranged predominantly in a ring, prominent secondary xylem,
medullary rays and a broad parenchymatous pith. The leaf possessed single-layered epidermis, distinctly
differentiated palisade and spongy mesophyll and collateral, closed vascular bundles comprising a prominent
central bundle and smaller lateral bundles. The central leaf bundle exhibited adaxial xylem and abaxial
phloem. The findings provide baseline information for quality assessment and standardization and may serve
as a reference for future taxonomic and multidisciplinary investigations of this underexplored wild leafy
vegetable.