Botanical Characteristics, Phytochemistry and Pharmacological Profile of Digera muricata (L.) Mart.: A Critical Narrative Review

Abstract

Digera muricata (L.) Mart. (Amaranthaceae), commonly known as false amaranth or tartara, is an annual wild edible herb distributed through parts of Africa, the Arabian Peninsula and South Asia. It occupies an unusual position at the interface of weed ecology, traditional food use and ethnomedicine. This critical narrative review integrates botanical, ethnobotanical, nutritional, phytochemical and pharmacological evidence available up to 26 June 2026. Live searches were undertaken across PubMed, PubMed Central, DOAJ, Semantic Scholar, Google Scholar, AGRIS and relevant regional scholarly sources, supplemented by backward and forward citation searching. Particular emphasis was placed on authenticated plant identity, analytical quality, model relevance, reproducibility and the distinction between biochemical activity and clinically meaningful efficacy. The botanical literature supports a stable placement of D. muricata within Amaranthaceae and documents diagnostic vegetative, floral and pollen characters, although older pharmacognostic descriptions are uneven in voucher reporting. Phytochemical studies consistently indicate phenolic, flavonoid, sterol, terpenoid and related constituents, with quercetin, β-caryophyllene and phytosterol-rich fractions receiving the strongest direct analytical support. Newer mass-spectrometric work expands the candidate metabolite space but remains predominantly qualitative. Pharmacological evidence is concentrated in antioxidant assays, toxin-induced rodent organ-injury models, antimicrobial screening, macrophage experiments and limited cancer cell-line work. Renal, hepatic and testicular protection in chemically injured rodents is internally coherent with antioxidant mechanisms, but the evidence derives from small preclinical studies using incompletely standardised extracts. Likewise, antimicrobial, anti-inflammatory, anti-atherogenic and anticancer findings remain exploratory because extract composition, positive controls, exposure metrics and replication vary substantially. No robust clinical evidence was identified. The most defensible interpretation is therefore that D. muricata is a nutritionally and chemically interesting wild edible species with multiple experimentally supported bioactivities, but not yet a clinically validated medicinal agent. Future work should prioritise taxonomically authenticated material, quantitative metabolomics, extract standardisation, pharmacokinetics, dose-response toxicology, mechanistic replication and appropriately powered translational studies.