Xylosma longifolia

Trunk and foliage Xylosma longifolia is an evergreen shrub or tree, typically reaching in height. Its gray-brown bark is scented, and the trunk may bear simple or branched spines, though they vary. Branchlets are glabrous, often armed with axillary spines, and exhibit sympodial growth. The leaves are simple, alternate, and stipule-absent, with a short petiole measuring and a leathery blade measuring by . Leaf shape varies from narrowly elliptic, oblong-elliptic, oblong-lanceolate, to narrowly obovate, but are typically lanceolate, featuring an acute, cuneate, or rarely obtuse base, serrate edges, and an acuminate tip with a acumen. Lateral veins number 6–11 pairs, prominently raised on both surfaces. Flowers Flowers are unisexual, hypogynous, bracteate, and greenish, measuring in diameter. They are borne in short racemes or reduced panicles, either singly or in condensed clusters within leaf axils. The rachis is long, glabrous or puberulous. Pedicels are slender, puberulous, and long. Bracts are ovate in staminate flowers and lanceolate in pistillate flowers, measure , and glabrous or sparsely puberulous. Sepals, numbering 4–5, are persistent, ovate or lanceolate, , glabrous or sparsely puberulous abaxially, entirely glabrous adaxially, with entire to erose margins. Petals are absent in both male and female flowers. Staminate flowers feature minute, , ellipsoid, dorsifixed anthers and a glandular disk with small, connate glands. Pistillate flowers possess an annular or few-lobed disk, an ovoid superior ovary, measuring roughly with 2–3 placentas, each bearing 2–3 ovules. Styles, numbering 2–3, are very short, measuring or less and may be partly or completely joined. Fruit The fruit is a globose, dry berry, in diameter, glabrous, and crustaceous, enclosed in a thin sheath without dark streaks. Initially red when ripe, it dries to black, with the persistent calyx, disk, and style remaining attached. Fruiting pedicels are slender, long. Seeds, numbering 4–5, are brown, measure roughly long, ovoid, and flattened on one or more sides due to mutual compression. Flowering occurs from April to May, with fruiting from June to October. ==Distribution==

It is native to the following regions as defined in the World Geographical Scheme for Recording Plant Distributions: • China: China South-Central, China Southeast • Eastern Asia: Hainan • Indian Subcontinent: Assam, East Himalaya, India, Nepal, Pakistan, West Himalaya • Indo-China: Laos, Myanmar, Thailand, Vietnam ==Ecology==

Xylosma longifolia is found in moist subtropical and mountain forests, typically at elevations ranging from , often thriving in ravines. It primarily relies on entomophily, though cleistogamy and allogamy also occur. Seed dispersal is facilitated through autochory, zoochory, and anthropochory. ==Taxonomy==

Xylosma longifolia was first described by Nathaniel Wallich in 1845 as Flacourtia ferox, although it used a different type specimen. The original taxon was superseded in 1857 by Dominique Clos with Xylosma longifolium. The collective number of synonyms across different sources is approximately 15. Etymology Due to its wide geographic distribution, Xylosma longifolia is known by numerous common names across different regions. In India alone, names vary by language and locale; notably known by chirundi, dandal, dieng-kani, godya, katari, kataponial, kandhara, mota-koli, nongleishang, katpatra, pansra, phalama, and sialu. In China, it is commonly called cháng yè zhà mù () or cháng yè zuò mù (), while in Pakistan it is known as batti. In English, the plant is referred to as long-leaved xylosma or longleaf logwood. The species epithet longifolia means "long-leaved", in reference to the length of the foliage of this species. ==Phytotherapy==

Xylosma longifolia is a significant ethnomedicinal plant widely used in northeastern India, particularly in Assam and Manipur. Both its leaves and stem bark are valued in traditional medicine for treating numerous ailments, including liver disorders, jaundice, piles, dysentery, gastritis, stomach pain, kidney stones, coughs, acne, scabies, ringworm, dizziness, restlessness, insomnia, anxiety, muscular sprains, and skin infections. It is also employed to eliminate lice and ticks, and even used by some communities in brewing beer. The plant exhibits notable pharmacological properties such as antispasmodic, antioxidant, antifungal, antidermatophytic, and antitubercular effects. Tribal communities prepare decoctions, extracts, or topical applications from boiled leaves and bark depending on the condition being treated. Phytochemical screening of methanol extracts has revealed a rich profile of bioactive compounds, including alkaloids, flavonoids, phenols, tannins, terpenoids, and saponins. Spectroscopic and chromatographic analyses confirmed the presence of multiple functional groups and a variety of major and minor compounds. These findings underscore the therapeutic potential of the plant and point to the need for further research to isolate and develop new drugs from its phytoconstituents. ==Conservation status==

Xylosma longifolia is broadly distributed with a stable and plentiful population. It currently faces no significant threats, and none are projected in the near future. Accordingly, it is listed as Least Concern by the IUCN Red List, though further research is needed to strengthen and expand upon this assessment. ==Notes==