Anatomy ofAcanthospermum hispidum DC
Acanthospermum hispidum DC. exhibits several anatomical characters commonly met with in the family Asteraceae,e.g., (i) variety of trichomes, (ii) a ring of discrete vascular bundles, heterogenecus pericycle and resin ducts in the stem, and (iii) anomocytic stomata and absence of hypoderm in the leaf. These with some others can serve as a diagnostic combination of characters for the species. Among the latter, mention may be made of (i) absence of root-pith, (ii) trichome complement made up of glandular and non-glandular uniseriate hairs, (iii) resin ducts present in root, stem and leaf, (iv) collenchymatous stem hypodermis interrupted by chlorenchyma below the stomata, (v) trilacunar node, (vi) foliar supply disposed as a crescentic arc of three discrete vascular bundles, (vii) dorsiventral mesophyll, (viii) absence of hypoderm in the leaf, and (ix) superficial origin of cork cambium in root and stem.
KeywordsVascular Bundle Resin Canal Anatomical Character Resin Duct Pith Cell
Unable to display preview. Download preview PDF.