Dendrobium williamsonii

{{Short description|Species of orchid}}

{{Italic title}}

{{Speciesbox

| name = Williamson's dendrobium

| image = Dendrobium williamsonii.jpg

|image_caption=1903 illustrationM. S. del. ( = Matilda Smith, 1854-1926), J. N. Fitch lith. ( = John Nugent Fitch, 1840–1927) Description by William Botting Hemsley (1843–1924) - Curtis's botanical magazine v 130

| taxon = Dendrobium williamsonii

| authority = Day & Rchb.f.

| synonyms_ref =

| synonyms =

• Callista williamsonii (Day & Rchb.f.) Kuntze (1891)

}}

Dendrobium williamsonii is a species of orchid, commonly known as Williamson's dendrobium. It is native to southern China (Guangxi, Hainan, Yunnan), Assam, and Indochina (Thailand, Myanmar, Vietnam).{{Cite web |title=World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew |url=https://wcsp.science.kew.org/namedetail.do?name_id=59503 |access-date= |website=wcsp.science.kew.org}}{{Cite web |title=Dendrobium williamsonii in Flora of China @ efloras.org |url=http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200028651 |access-date=2022-06-28 |website=www.efloras.org}} It is an epiphyte and grows on tree trunks in forests.